Answer:
generation 1
Explanation:
The allele frequency is a term that represents the frequency that an allele can appear in a given population. This term can help to develop conclusions about the genetic diversity that a region presents in relation to the individuals that compose it.
In relation to the question above, generation 1 had the highest frequency of having one of each allele. This is because this generation presents the maximum frequency of the dominant and recessive alleles in a coherent way, 0.60 and 0.40. However, the other generations showed a steady and progressive decrease in the recessive allele.
Answer:
Gen 1 or A
Explanation:
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Which type of cell can duplicate indefinitely?
Answer:
Embryonic stem cells
Explanation:
Answer:b
Explanation:
What is the difference between class and clade? Group and genus?
Answer:
is that genus is a rank in the classification of organisms, below family and above species; a taxon at that rank while clade is a group of animals or other organisms derived from a common ancestor species. a
AND
The main difference between species and genus is the taxonomic rankings that are used for biological classifications of organisms. Genus belongs to a ranking lower than family and above species, whereas species are organisms with similar characteristics that come below the Genus classification ranking.
Which of these is an example of a haploid cell?
Answer:
Gametes
Explanation:
Gametes are an example of a haploid cell and are produced as a result of meiosis.
Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory?
Answer:
Peyers patches
Explanation:
Peyers patches are group of lymphoid follicles found in the ileum of the small intestine.
This part of lymphatic system form part of immune system that help to control bacteria population in the small intestine and prevent the growth of pathogenic bacteria in the small intestines. It plays an important role in immune surveillance where it recognises pathogenic bacteria and destroy the bacteria.
It is a lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory because it form the part of the immune system which help to fight infection or foreign substances in the body, also by generating lymphocytes which is a white blood cells of the immune system which generate long term memory of foreign pathogens and destroying it.
Summarize the process of PCR in a diagram. Include all the steps, labeled and in the right order.
Answer:
Denaturation, Annealing and Extension are the steps of PCR.
Explanation:
There are three steps of PCR process.
1) Denaturation
2) Annealing
3) Extension
In the first step, the DNA denatures when they are allow to heat. In Annealing, the process of polymerization occurs. Polymerase chain reaction (PCR) is a method which is used to formed or produce billions of copies of a particular DNA sample. In this process, monomers attached to one another to form polymers and the process is known as polymerization. In the extension, new strands of DNA are formed by using the old DNA strands as a template.
Do you agree or disagree with the argument that humans are fundamentally incapable, as a species, of living sustainably?
Answer:
I disagree because there are examples that contradict this assertion
Explanation:
In the last years, sustainable human development has been one of the most important challenges in order to avoid Earth's collapse. In accordance with this aim, many people around the world are learning to responsibility use natural resources and live in communion with ecosystems capable of providing the primary matter required for economic progress. Examples of human groups that learned to use the available resources in a sustainable way include isolated societies living in forest areas, which live independently from the external globalization phenomenon. Moreover, in many countries, the percentage of energy obtained from clean sources is progressively increasing year by year, thereby supporting the fact that human societies can live sustainably.
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Answer:
[tex]\boxed{Option \ 2}[/tex]
Explanation:
=> In the first graph, we come to know that winters are colder and summers are hotter.
=> In the second graph, winters have more precipitation than summer.
=> On the whole, Winters have lower temperature and more precipitation than summers. ← [Option 2]
=> Summers have high temperatures and less precipitation.
Answer:
[tex]\boxed{\sf Option \ 2}[/tex]
Explanation:
We can see in the first graph that the winter months have a lower temperature compared to the summer months. The summer months have higher temperatures.
In the second graph, the winter months have much higher average precipitation compared to the summer months. The summer months have lower average precipitation.
Winters have lower temperatures and more precipitation than summers.
After the centromeres separate during mitosis, the sister chromatids, now called _______, move toward opposite poles of the spindle.
Answer:
(E) daughter chromosomes
Explanation:
A phosphodiester bond is used to: A. join two glucose molecules. B. join two nucleotides into a polynucleotide. C. join glycerol to fatty acids. D. join two amino acids into a polypeptide.
To join two nucleotide in a polynucleotide, phosphodiester bond is used. The correct option is B.
What is phosphodiester bond?A bond formed by a sugar group and a phosphate group; these bonds make up the sugar-phosphate-sugar backbone of DNA and RNA.
A diester bond connects two different nucleotides to form the nucleotide polymers DNA and RNA.
Thus, the correct option is B.
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Reptiles are closely related to birds. Which of the following characteristics do birds and reptiles share?
What can a person do to limit exposure to X-rays?
wear sunblock
avoid cigarette smoke
wear a protective vest avoid chemicals
X-rays are a form of indirectly ionizing radiation, and it can be really nocive to the humans health, so limiting the exposure is always a priority.
Here the correct option is wearing a protective vest.
-------------------------------------
X-rays are a form of radiation that is indirectly ionizing. Remember that ionization is what causes damage to our cells, so is better to avoid exposures to these types of radiation.
Now, X-rays are strong enough that they can penetrate a lot of common materials (like wood, plastic, etc.) And once it enters in your body, the chain of reactions that starts can't be stoped by external means.
So what you need to do is limit the exposure as much as you can. Ideally, you shouldn't be near a source of X-rays, but if there is no other option, you should use protection against radiation.
It comes in different forms depending on what the application is, for example, there are led screens that you can use to put between you and the source, and these will reduce drastically the fluence (flux of photons) that gets to you.
Similarly, there are protective vests also made in part of led or other high atomic number materials, that absorb the photons and protect you.
So here the correct option is to wear a protective vest, from the given options, is the only one that will protect you from the X-rays.
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Match the organelle to its function.
A) turgor pressure
B) ribosome production
C) support and flexibility
D) synthesis of complex polysaccharides
E) photosynthesis
F) synthesis of secretory proteins
G) detoxification of hydrogen peroxide
H) contains pigments in flowers
I) storage of hydrolase
J) boundary of the cell
K) protein synthesis
L) oxidation of sugars
M) cell shape and movement of organelles
N) information center
O) steroid synthesis
1) nucleus
2) mitochondrion
3) chloroplast
4) nucleolus
5) rough endoplasmic reticulum
6) smooth endoplasmic reticulum
7) extracellular matrix
8) cytoskeleton
9) chromoplast
10) Golgi complex
11) lysosome
12) peroxisome
13) central vacuole
14) ribosome
15) plasma membrane
Answer:
Explanation:
This involves organic present in plant cell and the functions of all these various organelles.
A) turgor pressure - Central vacuole
B) ribosome production - nucleolus
C) support and flexibility - cytoskeleton
D) synthesis of complex polysaccharides - Golgi complex
E) photosynthesis - chloroplast
F) synthesis of secretory proteins - rough endoplasmic reticulum
G) detoxification of hydrogen peroxide - Peroxisomes
H) contains pigments in flowers - chromoplasts
I) storage of hydrolase - lysosomes
J) boundary of the cell - plasma memebrane
K) protein synthesis - ribosome
L) oxidation of sugars - Mitochondrion
M) cell shape and movement of organelles - cytoskeleton
N) information center - nucleus
O) steroid synthesis - Smooth endoplasmic reticulum
Many farm animals used for meat are given antibiotics to promote their growth. What effect would this have on antibiotic resistance through time?
Answer:
It can lead to increased incidence of drug resistant bacteria.
Explanation:
Many farm animals used for meat are given antibiotics to promote their growth. They are also given these antibiotics to treat certain diseases caused by pathogenic microbes such as bacteria.
The continual use of antibiotics will however lead to increased incidence of drug resistant bacteria present in the world at large due to the exposure of the bacteria to these drugs resulting in the formation of resistant species of the bacteria with time .
Which feature separates humans from other primates? smaller brain size bipedalism use of tools complex social skills
Answer:
Bipedalism.
Explanation:
Bipedalism is a human's ability in which they can use their two hind legs to run or walk without the help of their front limbs, unlike other primates.
Answer:
Bipedalism
Explanation:
i took the test and failed
17- Microorganisms which require 0-5.5 pH for the growth are:
A. Neutrophils
B) Acidophiles
C. Alkaliphiles
D. All of the above
E. None of the above
Acidophiles is the correct
Which of the following areas indicates the occipital lobe on the diagram below? Region A is the anterior (front) section. Region B is the medial (middle) superior (up) section. Region C is the posterior (back) section. Region D is the medial (middle) inferior (down) section. Region D Region B Region C Region A
Answer:
Region C is the posterior (back) section.
Explanation:
The occipital lobe is found at the back of the head.
Hope it helps.
Answer:
C the green highlighted part
Explanation:
Took the test
Which of the following phenotypic classes reflect offspring that were generated as a result of a recombination event?
a. vestigial wings, red eyes
b. vestigial wings, purple eyes
c. full wings, red eyes
d. full wings, purple eyes
Answer:
The correct options are: A " vestigial wings, red eyes" and D "full wings, purple eyes"
Explanation:
female parent: vg+pr+/vg pr
(phenotype - full winged and red eyes)
male parent: vgpr/vgpr
(phenotype - vestigial winged and purple eyes)
Of these traits, vestigial wings and purple eyes are recessive traits. Hence, when a recombination event occurs, the offspring can potentially have a wild type trait paired with a recessive trait.
Which behavior is an instinct?
A.pigeon begins visiting a local park to look for dropped crumbs.
B. A pet dog sits and waits for a treat after its daily walk.
C. A deer gets used to hikers walking by and stops running away.
D. A newborn piglet drinks its mother's milk.
An instinct is: D. A newborn piglet drinks its mother's milk
Answer:
D. A newborn piglet sticks it's mother's milk.
Explanation:
Because that is natural and all the others adapted to the other stuff, a piglet drinking it's mother's milk is natural.
I need help as soon is possible pls!!!! A physicist is studying light absorbance in the ocean. He graphs his data as shown below. What color of light would most likely be present at 200 meters below sea level, and why? Justify your answer by using the provided data.
Answer:
blue
Explanation:
if you look at the graph, it's asking which color would most likely be present 200 meters below sea level. The only color/bar that comes close, or in this case surpasses 200m, is the color blue.
The blue color of light would most likely be present at 200 meters below sea level because the wavelength of the blue light falls under the visible light spectrum.
What is Absorbance?Absorbance may be defined as a quantity that can significantly be measured by the ability of a substance to absorb light of a specified wavelength. It is remarkably equal to the logarithm of the reciprocal of the transmittance.
According to the question and graph carefully, one can easily find out the light which has penetrated deep into the ocean is blue. Apart from this, blue light significantly has the shortest wavelength which means the highest energy.
Therefore, the color of light that has most likely been present at 200 meters below sea level is blue.
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Which mode of genetic recombination is matched correctly with its description? transduction—virus transfers genes from one bacteria to another conjugation—involves splitting of one cell and results in two identical cells binary fission—requires direct cell-to-cell contact of bacteria transformation—uses a pilus to transmit genetic information between bacteria
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
Transduction is a mechanism of recombination where DNA fragments are inserted into bacteria by a viral vector. The mechanism of transduction is commonly used by molecular biology laboratories to insert gene fragments into both bacterial and mammalian cells.
Conjugation is the genetic mechanism in which bacteria transfer genetic information among them by direct contact.
Binary fission is the most common type of asexual reproduction in bacteria. In binary fission, the DNA molecule is replicated and, subsequently, the bacterial cell is divided into two daughter cells with identical genetic material.
Finally, the transformation is the mechanism of horizontal gene transfer in which one bacterium takes up genetic information into the surrounding environment and incorporates it into its genome.
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
edge
Which feature separates humans from other primates? smaller brain size bipedalism use of tools complex social skills
Answer:
Complex social skills
Explanation:
Answer:
Complex social skills.
Explanation:
Humans actually have larger brains than other primates, so smaller brain size is incorrect.
Other primates, such as chimpanzees, orangutans, and gorillas, all have the ability to use tools, so that is incorrect.
Some primates, such as chimps and baboons, do stand on their hind legs at times, so bipedalism does not separate humans from other primates.
So, complex social skills separate humans from primates.
Hope this helps!
In untreated type 1 diabetes, the hepatocyte's citric acid cycle becomes overwhelmed with acetyl‑CoA from excessive fatty acid oxidation. Although the excess acetyl‑CoA is not toxic, it must be diverted into the formation of ketone bodies: acetone, acetoacetate, and D‑β‑hydroxybutyrate.
What problem would arise if the excess acetyl-CoA were not converted to ketone bodies?
a. Fatty acid oxidation would stop when all the COA is bound as acetyl-CoA.
b. While acetyl-CoA is not toxic, it inhibits D-β- ohydroxyacyI-CoA dehydrogenase.
c. While acetyl-CoA is not toxic, it prevents transfer of fatty acids into the mitochondria by forming acetyl carnitine.
d. Formation of acetyl-CoA requires uptake of a proton, and the increased pH inhibits further oxidation.
If the excess acetyl-CoA were not converted to ketone bodies, Fatty acid oxidation would stop when all the CoA is bound to acetyl-CoA. Thus, the correct option is (A).
What is Acetyl-CoA ?
Acetyl-CoA is the component of cellular respiration which adds acetyl groups to the biochemical reactions and these reactions are used in the metabolism of proteins, carbohydrates and lipids which provide energy in the form of ATP (Adenosine Triphosphate), lactic acid and Ketone bodies.
It also play an important regulatory role in intercellular mechanism which is essential for energy production when fasting or starving. It formed inside or outside the cell mitochondria where it must be freely available as a metabolite and can be produce by breakdown of carbohydrates (glucose) and lipids (fatty acid).
It's main function is to transfer the carbon atom in acetyl to other molecules. Acetyl Co-A consist of acetyl and CoA . Acetyl is [tex]CH_{3}CO[/tex] which is produced by the breaking down of pyruvate, a derivative of carbohydrate.
When this pyruvate is breakdown, it produces small bonded carbon molecules these react with Co-A it forms Acetyl Co-A.
So, the excess acetyl-CoA were not converted to ketone bodies, Fatty acid oxidation would stop when all the CoA is bound to acetyl-CoA. Thus, the correct option is (A).
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characters of a fertile soil
Answer:
There are so many characteristics of fertile soil like: It is rich in nutrients necessary for plant nourish ment. It includes nitrogen , phosphorus and potassium. It consists adequate minerals such as boron, chlorine, cobalt, iron, magnese, sulphur etc.Explanation:
Hope it helps you.Write the sequence of the RNA strand that would be complementary to the DNA
sequence shown below.
TACCGATGG
Answer:
AUGGCUACC
Explanation:
RNA has three nucleotides in common with DNA: A (Adenine), C (Cytosine), and G (Guanine). However, T (Thymine) in DNA is replaced with U (Uracil) in RNA. A pairs with U, T pairs with A, and C pairs with G and vice versa.
So, the sequence will go like this:
TACCGATGG (DNA)
AUGGCUACC (RNA)
Hope this helps.
What are the erosional and depositional features of a glacier?
Answer:
Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, arêtes, and horns. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.
Explanation:
Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, arêtes, and horns. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.
Through which vascular tissue do water and nutrients get transported to reach the leaves during transpiration? cuticle parenchyma xylem phloem
Answer:
Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
Explanation:
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Answer:
C. xylemExplanation:
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Part of a forest area was cleared to build a road. What’s one possible consequence of this clearing?
A.
The rate of the growth of trees will increase.
B.
The population of herbivorous animals will increase.
C.
Animals will migrate to other places because they have less food and shelter.
D.
The frequency of forest fires will increase.
Answer:
Option C
Explanation:
Animals will migrate to other places because they have less food and shelter. Since the forest have been cleared, their habitat (where they lived) is no more and they have to move to another place in order to survive because there would be no more food for them here.
Answer:
The answer is option C.
Animals will migrate to other places because they have less food and shelter.
Hope this helps you
The papillae located mainly on the tip and sides of the tongue that contain only a few taste buds each are the _______ papillae
Answer:
Fungiform
Explanation:
The papillae located mainly on the tip and sides of the tongue that contain only a few taste buds each are the Fungiform papillae.
The fungiform papillae are broad flat structures that house taste buds in the central portion of the dorsum (back) of the tongue. These papillae were thought to resemble a fungus: a little mushroom. The literal meaning of Fungiform is mushroom-shaped.
Answer the following True or False: A hypothesis test was conducted to see if a new HIV vaccination reduces the risk of contracting the HIV virus. The implication of a Type II error from the clinical trial is that the vaccination will not be approved when it indeed does reduce the risk of contracting the HIV virus.
Answer:
The correct answer is - true.
Explanation:
Type I error occurs when the alternate hypothesis is accepted though it is false. A type II error is the failure to reject a false null hypothesis or an alternative hypothesis is rejected even though it is true.
For instance of type II errors: a blood test designed to detect the disease failing to detect the disease in a patient who really has the disease. In the given case vaccination not approved even though reduce the risk of contracting the HIV virus.
Thus, the correct answer is - true.
Jacob calls his friend Mark to tell him the news, and to Jacob's surprise, Mark has heard of MSUD. In fact, Mark says that his wife is a carrier so he got tested to see if he was a carrier as well. After getting tested, Mark and his wife decided to have children because there was no increased risk of their child getting MSUD. Based on this information, Mark and his wife must have the genotype: g
Answer:
Explanation:
Since Mark's wife was a carrier, it means that she is heterozygous for the trait. And after Mark got tested, they decided to have children due to no increased risk if they do have children, it means the condition is not an autosomal dominant condition but a recessive condition because if the condition is dominant, only one copy of the affected allele is needed to increase risk.
Thus, with a no increased risk, it means Mark is normal i.e. carries no copy of the recessive allele.