Answer:
Urethra
Explanation:
I'm pretty sure it would be the urethra but if it's not let me know.
The urethra is a small thin-walled tube which leads from the floor of the urinary bladder to the outside of the body.
What is the excretory system?Human excretory system includes organs that facilitate the removal of nitrogenous wastes out from the body. The main excretory organs in the human body include kidney, ureter, urinary bladder and urethra. Kidneys are the organs which filter blood and urine is the filtrate obtained that is excreted out of the body.
The urethra is the small thin-walled tube that lets urine leave from bladder and the body. In the males, urethra passes through the prostate gland. In the females, the urethra is much shorter. It runs from the bladder to open in front of the vagina.
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Respond to the following based on your reading
1. are chemical messengers secreted by glands.
2. Exocrine glands, such as sweat glands, secrete fluids through ducts.
glands secrete hormones directly into the bloodstream
3. The gland plays an important role in puberty and growth
4 Epinephrine, triggering the "fight or flight response, is produced by the
glands, which sit on top of the kidneys.
5. Most glands that secrete hormones operate using feedback mechanisms.
When hormone concentrations are high, the gland will produce
of
the hormone
6. Many cells produce chemicals called hormone-Eke substances that
impact inflammation and reproduction
7. The gland that helps regulate growth, body temperature, and the level of
calcium in the blood is called the
8. Describe the function and compare steroidal and nonsteroidal hormones. How
does each type of hormone interact with the cell? What other molecules are
required for or involved in their function?
Answer:
1. hormones
2. endocrine glands
3. pituitary
4. adrenal glands
5. fewer amounts of the hormone
6. parathyroid hormone-like hormone (PTHLH)
7. the thyroid and parathyroid glands
8. Steroid hormones are produced from cholesterol, while nonsteroid hormones are produced from amino acids.
Explanation:
Hormones are signaling molecules secreted by the body to control cellular activities The endocrine glands are glands that don't have ducts to carry their secreted products (hormones) to the surface. Endocrine glands include the hypothalamus, ovaries, testes, pancreas, adrenal glands, parathyroid glands, pituitary gland, pineal gland, thymus and thyroid glands. The pituitary gland is an endocrine gland that secretes many hormones into the bloodstream, which are capable of controlling the functioning of other organs and glands. During the puberty stage, this gland secretes LH and FSH gonadotropin hormones that affect male and female gonads in order to activate the production of sex hormones. The adrenal glands secrete cortisol, which is known as the stress hormone. These glands also produce adrenaline which regulates visceral functions such as, for example, respiration. The parathyroid hormone-like hormone (PTHLH) is generated by epithelial cells and plays important roles in fetal and adult tissues, (i.e., cell proliferation, differentiation and morphogenesis). The thyroid gland regulates body temperature, while parathyroid glands control the calcium level in the blood by secreting the parathyroid hormone (PTH). Steroid hormones are lipidic hormones known to bind steroid receptors and they can easily cross the cell membrane, while non-steroid hormones cannot diffuse across the cell membranes and they are secreted by the endocrine system.
What is the morphology of Homo erectus, brain size, body size, and cranial shape?
Answer:
Explanation:
Homo erectus existed about 200 million yeas ago as one of the early man to occupy the old world. Homo erectus are said to be the direct ancestors of other homos. The brain size of homo is population dependent and it ranges from 546–1, 251 cc (33.3–76.3 cu in). The maximum size of the brain was achieved early in their life to
this is similar to childhood in modern human.
Body size ranged widely from 146–185 cm which is about 4 feet 9 inches –6 feet 1 inch in height and 40–68 kg in weight.
Homo erectus have a flat skull that is low. The face is also flat compare to modern humans with brow ridge.
Which of the following are roles carbohydrates play in biological systems? Group of answer choices the basis of most of the organic matter on our planet (cellulose, chitin, etc.)
Answer: Here are the completed options
fuels
components of DNA and RNA
signalling
forming barriers between organelles
digesting enzymes
breaking up lipids for digestion
providing structure
The correct options are
most of the organic matter on our planet (cellulose, chitin, etc.)
Carbohydrates act as Body fuels
providing structure
Explanation:
Carbohydrates are biological molecules and are constituents of starches, sugars, glucose e.t.c and are made up of carbon, hydrogen and oxygen which are the major constituents elements of the most organic matter on the planet.
Carbohydrates is a body fuel that act as the major energy source in the body. It gives and provide energy in the body needed for biological activities.
In plants, carbohydrates make up part of the cellulose, giving plants strength and structure. carbohydrates is to form a structure called the glycocalyx.
The cross AB/ab X ab/ab produces the following progeny: AB/ab 391, ab/ab 401, aB/ab 406, Ab/ab 386. From these data, one can conclude that the A and B loci assort independently.
A. True
B. False
Answer:
B
Explanation:
The two loci did not assort independently.
In order to check for independent assortment or otherwise of the result from the cross, Chi-square is used to see if the result conforms with that of Mendelian standard of 9:3:3:1.
Phenotype Observed f Expected f [tex]X^2[/tex] = [tex]\frac{(O - E)^2}{E}[/tex]
AB/ab 391 9/16 x 1584 = 891 [tex]\frac{(391-891)^2}{891}[/tex] = 280.58
ab/ab 401 3/16 x 1584 = 297 [tex]\frac{(401-297)^2}{297}[/tex] = 36.42
aB/ab 406 3/16 x 1584 = 297 [tex]\frac{(406-297)^2}{297}[/tex] = 40.00
Ab/ab 386 1/16 x 1584 = 99 [tex]\frac{(386-99)^2}{99}[/tex] = 832.01
Total [tex]X^2[/tex] = 280.58 + 36.42 + 40.00 + 832.01 = 1,189.01
Degree of freedom = 4 - 1 = 3
Tabulated [tex]X^2[/tex] at degree 3 freedom and 95% level = 7.815
The calculated [tex]X^2[/tex] value is more than the tabulated value. Therefore, we conclude that the outcome of the cross is not in agreement with Mendelian standard and hence, the A and B loci did not assort independently.
The correct option is B.
How can you guarantee a high expression of your protein in any expression vector?
Answer:
protein expression refers to the way in which protein are synthesized, modified and regulated in living organisms.
Explanation:
In the protein research,the term can apply either the object of study or the laboratory techniques required to manufacture proteins.
Which of the following is a human-related release of greenhouse gases?
O A. Wild animal respiration
OB. Volcanic eruptions
O C. Intensive agriculture
O D. Solar cycles
It’s A
Answer:
C
Explanation:
I'm pretty sure it's actually C and not A. It's asking for human-related release from greenhouse gases. Humans don't cause volcanic eruptions and aren't in control of wildlife's respirations. The solar cycles has to do with the magnetic flux that rises to the surface of the sun and lasts 11 years. Intensive agriculture increases pollution which harms the environment.
New mutations can also occur randomly, so there’s a chance that children of parents who didn’t inherit the gene for Huntington’s can develop a mutation in the gene that causes Huntington’s disease explain how protein synthesis contributes to the symptoms of the disease
Answer:
It depends on the mutation rate
Explanation:
Mutations are genetic changes that occur naturally by errors during DNA replication which are not repaired by the DNA repair mechanisms. When a mutation occurs in the germline line, it may pass to the next generations and thus perpetuate itself. Huntington's disorder is an autosomal dominant disorder associated with a trinucleotide repeat mutation in the huntingtin (HTT) gene localized on chromosome 4, which encodes the Huntingtin protein. It has been shown that the high levels of Huntingtin are linked to Huntington's disorder, thereby it is believed that this mutation might be associated with a higher expression of the HTT gene.
WILL MARK BRAINLIEST!Which effect is most likely from a hurricane?
A. damaged homes due to flooding
B. forest fires due to lightning strikes
C. cars sucked in due to a low-pressure center
D. damaged personal property due to hail
Answer:
A. damaged homes due to flooding
Explanation:
A hurricane is a storm that produces heavy rains and winds. When it rains heavy, water levels rise which leads to flooding and damages homes.
Also, choice B is the effect of lightning striking trees, choice C is the effect of a tornado, and choice D is the effect of a hail storm.
Hope that helps.
Answer:
I think its A
Explanation:
DNA and RNA are structurally similar in some ways, but different in others. Identify whether each of the following statements applies to DNA, RNA, both or neither.
1. It can contain the pyrimidine cytosine.
2. It can contain the pyrimidine uracil.
3. This contains the sugar 2'-deoxyribose.
4. In terms of base composition, the %A = %C.
5. This contains the sugar ribose.
6. The bases are attached to sugars in a beta-N-glycosidic linkage.
7. It contains equal amounts of guanine and cytosine.
8. Sugars are connected with a 3'-5' phosphodiether link.
Answer:
Explanation:
1. It can contain the pyrimidine cytosine - Both
2. It can contain the pyrimidine uracil - RNA
3. This contains the sugar 2'-deoxyribose - DNA
4. In terms of base composition, the %A = %C - Neither: %A = %T
5. This contains the sugar ribose - RNA
6. The bases are attached to sugars in a beta-N-glycosidic linkage - Both
7. It contains equal amounts of guanine and cytosine - Both
8. Sugars are connected with a 3'-5' phosphodiether link - Neither: they are connected by a 3'-5' phosphodiester link
Which of the following best describes the flow of energy in the Everglades food web shown below? (4 points) Diagram for an everglades food web. The food web contains the following organisms: American alligator, egret, raccoon, carp, Key deer, insects, Southern leopard frog, mangrove, and sawgrass. Mangrove is at the bottom of the food web, with arrows pointing to Key deer and insects. Sawgrass is also at the bottom of the web, with an arrow pointing to insects. Key deer, insects and Southern leopard frog are on the next level up. The Key deer has an arrow pointing to American alligator. The insects point to egret, carp, and Southern leopard frog. The Southern leopard frog points to the American alligator and the raccoon. The egret, carp and raccoon all points upward toward the American alligator. The carp also points to the egret. The American alligator is at the top of the food web. Mangrove → insects → carp → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level. Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level. American alligator → carp → insects → mangrove; about 10 percent of the energy in one trophic level is transferred to the next trophic level. Egret → insects → mangrove → key deer → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level.
Answer:
Although there is no diagrammatic representation of the food web but the question can be answered based on the provided information. The answer is:
Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Explanation:
Food web is an interconnected food chain i.e. a series of food chains clustered together. A food web represents the various ways one organism can feed on another in a cycle. Since a food web consists of many food chains, energy is transferred when one organism feeds on another (flow of energy).
Just like a food chain, a food web begins with a PRODUCER, which is an organism capable of producing its own food via photosynthesis. This is the case of mangrove and sawgrass in this depicted food web as they are both producers and hence, must start the food web i.e. be at the bottom of the food web. Organisms called CONSUMERS feed on producers and one another to obtain energy. Consumers can be primary, secondary or tertiary depending on the organism they feed on. Primary consumers feed directly on producers, secondary consumer on primary and tertiary consumers on secondary, in that order.
This accounts for why the American Alligator is at the top of the food web because it is a tertiary consumer.
However, as organisms feed on one another, only about 10% of the available energy is transferred because most of the energy (about 90%) has been used for metabolic processes and hence, lost as heat.
Therefore, the best description for the flow of energy in the Everglades food web is:
Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Sawgrass is the producer and must begin the energy flow, followed by a primary consumer (insect). Feeding continues in that order until the tertiary consumer (American alligator) is reached.
Answer:
b) Mangrove → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Explanation:
took test on FLVS
In a sample population of people, 36% have the recessive trait of "free" earlobes (q2). What is the frequency of the dominant allele for attached earlobes, p?
a. 0.40
b. 0.64
c. 0.10
d. 0.24
Answer:
Explanation
Given that 36% are recessive in traits
100-36 = 64% for dominant traits considering a whole population to be 100%
P=dominant allele
q= recessive allele
P2= dominant genotype
q2= recessive genotype
according to hardyweinberg principle, p+q=1
64/100= 0.64 frequency for dominant traits or genotype, therefore
p2=0.64
then
P=√0.64
p= 0.8
Therefore, dominant allele frequency (p) for the population is 0.8
Option B is correct. The frequency of the dominant allele for attached earlobes, p is 0.64
Let the recessive trait of "free" earlobes be q2Let the dominant allele for attached earlobes be "p2"Hence p + q2 = 1 according to hardyweinberg principle
Given the following parameters:
population of those with recessive traits = 36% = 0.36
p = 1 - q2
p = 1- 0.36
p = 0.64
Hence the frequency of the dominant allele is 0.64
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Consider only the experiment you conducted with 500 mg. of lactose.
a. What is the independent variable?
b. What is the dependent variable?
Answer:
a. time (on the x axis)
b. the product formed - molecules/minute (on the y axis)
Explanation:
The independent variable is the one you control while carrying out the experiment, you can adjust for it as needed and how much ever needed. The dependent variable is the one which you cannot control or vary at you own will during the experiment, it is essentially the data you collect from running the experiment.
DNA polymerase is an enzyme required in DNA replication. Its role is to
DNA, adding individual nucleotides to each strand of newly synthesized
the help of other enzymes such als primase and ligase. There are several
DNA polymerase in both prokaryotes and eukaryotes, but through diffe
portions of DNA polymerase are highly conserved. What do you think is
evolutionary significance of DNA polymerase? What do you think would
there was a genetic mutation on the genes encoding for DNA polymeras
A sample answer would look like this: The DNA polymerase has evolutio
significance because it is required for DNA to be transmitted across gene
genetic mutation in a gene encoding for DNA polymerase could lead to s
flaws in DNA replication, which could lead to major flaws in the DNA rep
cell division. This could lead to large-scale errors and result in the death
organism.
Answer:
Explanation:
DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, which are the building blocks of DNA. The enzymes play an essential role in DNA replication, usually working in pairs to produce two matching DNA stranges from a single DNA molecule.
One of the key molecules in DNA replication is the enzyme DNA polymerase. DNA polymerases are responsible for synthesizing DNA: they add nucleotides one by one to the growing DNA chain, incorporating only those that are complementary to the template.
Answer:
DNA polymerase has evolutionary significance because it is required for DNA to be transmitted across generations. A genetic mutation in a gene encoding for DNA polymerase could lead to significant flaws in DNA replication, leading to major flaws in the DNA replicated for cell division. This could lead to large-scale errors and result in the organism's death.
Explanation:
Penn foster
20. Geneticists creating the "glow in the dark" or fluorescent rabbit, inserted the GFP gene
from a jellyfish that makes it glow. The geneticist studied these rabbits to learn how....
(1 point)
A) to create a new energy source
B) to create interesting looking pets.
C) the florescent cells can help track the movement of cells.
D) to create light in a dark laboratory.
The answer is C) The fluorescent cells can help track the movement of cells.
Explanation:
Fluorescent animals such as rabbits have been created by using the GFP gene that is the Green Fluorescent Protein, which occurs naturally in the Aequorea Victoria jellyfish. In this way, the protein was extracted from jellyfish and used in mammals, including rabbits. This particular use of genetics does not only make animals glow in the dark but also helps geneticists to study cells as it makes visible how cells move, develop or change. Thus, the correct answer is C.
Properties of water Classify each statement as an example of adhesion, cohesion, or surface tension. Match each statement to the appropriate category.
a. A sewing needle floats when it is placed gently on top of water in a bucket.
b. Water molecules ding to plant cell walls. A water strider runs across a pond without breaking the surface.
c. A drop of water spilled on a table forms a drop on the table, rather than spreading out over the surface.
d. Water molecules cling to the side of a beaker. Water molecules are attracted to each other.
Answer:
c
Explanation:
What Are Blood vessels
Answer:
[tex]\boxed{\mathrm{see \: below}}[/tex]
Explanation:
Blood vessels are vessels that carry blood through organs and tissues. The five types of blood vessels are: arteries, veins, arterioles, capillaries, and venules. The main function of blood vessels is to carry blood throughout the body.
Answer:The blood vessels are the components of the circulatory system that transport blood throughout the human body.[1] These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues. Blood vessels are needed to sustain life, because all of the body's tissues rely on their functionality.[2]
There are five types of blood vessels: the arteries, which carry the blood away from the heart; the arterioles; the capillaries, where the exchange of water and chemicals between the blood and the tissues occurs; the venules; and the veins, which carry blood from the capillaries back towards the heart.
The word vascular, meaning relating to the blood vessels, is derived from the Latin vas, meaning vessel. Some structures – such as cartilage, the epithelium, and the lens and cornea of the eye – do not contain blood vessels and are labeled avascular.
Carbon dioxide molecules diffuse through cell membranes, but many other
substances cannot. A membrane that allows some, but not all, materials to
pass through it is called
Answer:
Semi-permeable membrane
Explanation:
In semi-permeable membranes, only some substances can pass through. Sometimes, some can also pass through the channel protein molecules or transport proteins on the cell membrane.
ne ol Ealin. Tutorial
30 of 44
B Save & E
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the
end of the activity, write a brief evaluation of your work.
Activity
A student drew this model to show the flow of convection currents on Earth.
90° desending dry, cold air
66.5°
2
ascending warm,
moist air
ascending warm,
moist air
equator
2
66.5°
90° desending dry, cold air
Part A
Answer:
72 5 degree
Explanation:
you will have to add 90 and 66.5 and will give you the answer which is 72.5 degree
what kingdom is penicillum belongs to?
Answer:
penicillium belong to kindom fungi. It occurs by asexual reproduction.Explanation:
Hope it helps you.When observing muscle tissue under the microscope, what distinguishing feature can be found in cardiac muscle, but NOT skeletal muscle?
Answer:
Cardiac muscle is only found in heart and skeletal muscle is found attached to bones.
When observing muscle tissue under microscope, different features found in cardiac muscle, but not in skeletal muscle are as follows:
Skeletal muscles has long multinucleate fibers while cardiac muscles are mononucleate, with only one nucleus per fiber.The ends of cardiac muscle fibers have intercalated discs that are darker regions and they are absent in skeletal muscles.How is an actual greenhouse similar to the natural greenhouse effect?
Explanation:
That's because the glass walls of the greenhouse trap the Sun's heat. The greenhouse effect works much the same way on Earth. Gases in the atmosphere, such as carbon dioxide, trap heat just like the glass roof of a greenhouse.
5. Analyzing a family's traits
Cindy is a beautiful teenager who becomes very upset when her hair begins to fall out in
big patches. Her sister Lynn is not experiencing hair loss, but their mother, Judy, states
that she has been losing her hair for years. The girls' maternal grandmother also lost hair,
although the maternal grandfather (mother's side), and the two paternal grandparents
(father's side) all have full heads of hair. This condition of hair loss is called alopecia
areata and is inherited as an autosomal dominant trait.
Construct a pedigree to represent the expression of alopecia areata throughout three
generations in Cindy's family. Under each symbol, write the person's name. Next to
each symbol, write the letters representing that person's known genotype (AA, Aa, aa,
or A
If Cindy marries a man with no evidence of alopecia in his family, what is the prob-
ability that their first child will have alopecia areata?
Cindy
Probability?
Answer and Explanation:
The pedigree is in the attached file named Pedigree. And due to technical issues, the answer and explanation are also attached in the file named Cindy´s family
The endosymbiosis or endosymbiont theory is meant to explain the origin of two specific organelles found in eukaryotic cells.
1. Name the two organelles.
2. Provide two pieces of evidence that support this theory.
Evidences that supports this theory
70s Ribosomal RNAnon membrane bound DNAThe acidification of the stomach juices is important for the digestion of proteins because: Group of answer choices Proteins are basic, and need to be neutralized.
Answer:
See the answer below
Explanation:
The acidification of stomach juices is important for the digestion of proteins partly because the enzyme responsible for protein digestion work in an acidic medium and the acid also facilitates the unfolding of the proteins.
Hydrochloric acid and the enzyme responsible for the initiation of protein digestion, pepsin is secreted as gastric juice by the stomach, and the latter works by breaking down protein chains into smaller fragments.
In which step of the water cycle does most of Earth's water enter the atmosphere?
A.
Transpiration
B.
Precipitation
C.
Evaporation
D.
Percolation
Answer: Evaporation
Explanation:
Answer:
A
Explanation:
Transpiration
46:11
The diagram shows an animal cell.
Which letter marks the location where carbon dioxide
is produced during respiration?
W
Х
Y
Z
Classify the following organisms into their respective kingdoms
1)Yeast
2)Penicillium
3)Rhizobium
4)mushroom
5)Amoeba
6)fish
Answer:
Yeast - Fungi Penicillium - Fungi Rhizobium - Monera mushroom - Fungi Amoeba - Protozoan fish - AnimaliaExplanation:
The Fungi Kingdom is a kingdom composed, as the name says, of fungi, which are organisms represented by many species, among them: yeasts, mushrooms, molds, Penicillium and others. As you already know, fungi are eukaryotic and multicellular organisms (with the exception of yeasts).
The monera kingdom is the kingdom formed by bacteria and also has several species as members. Among these species we can mention the Lactobacilli, Escherichia coli, Rhizobium (nitrogen-nodulating bacteria, very important for the natural fixation of nitrogen in legumes), among others.
The kingdom of protozoa is very diverse and even has an organism that does not have any type of genetic, structural and morphological similarity, but in most cases, the members of this kingdom are heterotrophs, eukaryotic and unicellular organisms. An example of this is amoebas.
The animal kingdom is made up of all animals, the most diverse and populous kingdom. All animals belong to that kingdom, including fish.
One of the procedures for cloning foreign DNA segments takes advantage of restriction endonucleases such as HindIII that produce complementary single strand ends (sticky ends). These enzymes produce identical sticky ends on cleaved foreign DNA and on the vector DNA into which you insert your DNA. Assume you have inserted your favorite gene into the HindIII site of the Bluescript cloning vector with ligase, you amplified it in E.coli, and isolated a large quantity of the plasmid with the insert. How do you excise your favorite gene from the plasmid?
Answer:
Restriction endonucleases are utilized to cut the deoxyribonucleic acid at a specific Restriction site. HindIII is an example of Restriction endonuclease. The Restriction site of HindIII is as per the following:
5'A*AGCTT3'
3'TTCGA*A5' (* represents restriction site)
The Restriction endonuclease cuts the particular gene from the foreign DNA and produces numerous fragments with the sticky ends. The part of the outside DNA which contains the gene of intrigue or a particular gene is ligated with the plasmid.
On the off chance that foreign DNA and plasmid DNA are separated by the same Restriction endonuclease, they will create sticky ends integral to one another. In this way, the segment of foreign DNA can be ligated to the plasmid DNA by the assistance of DNA ligase at the integral sticky end to shape a recombinant DNA.
Additionally, by the assistance of the same Restriction endonuclease for example HindIII for this situation, the recombinant plasmid can be treated with a similar Restriction endonuclease to extract the ideal gene or gene of intrigue.
A cline:
a. is continuous variation that follows a geographic continuum.
b. is variation that falls into discrete categories.
c. was used to describe human variation as early as the Renaissance.
d. describes the pattern of occurrence of trisomy 18.
Answer:
The correct answer is - option A is continuous variation that follows a geographic continuum.
Explanation:
A cline is a slow change in the physical and genetic traits of a population or species across a geographical difference or gradient. If a species present in a very large area, there would be some members live on different environmental condition in comparison to others.
By this gradient members of species show continuous variation that follows a geographic continuum. For, example, In a species of warm-blooded animals have large body size in cooler area than in warmer area.
Thus, the correct answer is - option A is continuous variation that follows a geographic continuum.
Explain why Inuit Eskimos, despite living in polar regions with little sunlight, remain
dark-skinned like their equatorial ancestors.
Answer:
Due to genetics.
Explanation:
Inuit Eskimos, remain dark-skinned like their equatorial ancestors despite living in polar regions with little sunlight because this black color transfer from generation to generation through genetics. These Inuit Eskimos are descendants of black people that were lived in the equatorial regions of the earth so these Inuit Eskimos also has black skinned like their ancestor.