Answer:
a mouthpart that can pierce fruits and seeds
Explanation:
An adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms. That being said the most likely morphological change that would trigger this would be a mouthpart that can pierce fruits and seeds. This new change would allow the beetles to consume most of the different resources that the island has to offer such as the different types of plants and fruits which were previously inaccessible to the beetles.
What are striations, and how do they form?
Answer:
Striations or striae are scratches or small elongated grooves in bedrock or on clasts that are the product of abrasion . Clasts protruding out of basal sliding ice are dragged along bedrock surfaces producing the marks. The rate of abrasion depends on the effective force with which individual clast fragments are pressed against the bed, the flux of fragments over the bed, and the relative hardness of rocks in the ice and of the bed (Hallet, 1979). Hallet (1979) also noted that where geothermal heat flow or frictional heating are high, or where the ice is extending, the rate of abrasion should be higher. He also noted that glacier thickness has no affect on abrasion, and hence on the nature of striation morphology.
Explanation:The presence of striations is a reflection of the spatial and temporal variations in the stresses exerted by rock fragments entrained in basal ice, as well as a representation of glacier sliding (e.g., Boulton, 1974; Kamb et al., 1976; Hallet, 1979, 1981; Shoemaker, 1988; Iverson, 1991). The greater the stresses exerted, the greater the promotion of crack growth and brittle failure, and the deeper and wider the striae tend to be (Drewry, 1986).
Eukaryotic cells are substantially larger than bacterial cells and average over 20 times more volume-per-surface-area than bacterial cells. How can the eukaryotic cell membrane provide this higher rate of exchange of materials
Answer:
it maintains this because of more exchange points on the cell with more surface area comes more ports of entry and exit for materials rather a simple concept
Explanation:
The 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.
What kingdom contains organisms that are multicellular, heterotrophic, eukaryotic, and lack cell
walls?
Answer:
Kingdom Animalia contains organisms that are multicellular , heterotrophic, eukaryotic and lacks the cell wall.
Explanation:
The reason for above answer is:
kingdom animalia are multicellular organism aa they are composed of various cells.they don't prepare food by themselves which makes them heterotrophic in nature.they have enclosed nucleus in cell which makes them eukaryotic in nature.their cell lacks the cell wall.Hope it helps...
Answer: Kingdom Animalia
Explanation:
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.
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.
Nancy is a new dental assistant in your office, and she just finished manually processing some dental radiographs. When you look at the films, you notice that they are very light. You exposed the films, so you are certain that the exposure factors were correct. What could have gone wrong?
Answer:
Nancy put them in developer for a short time, that is to say that the image was very clear and even though I later washed them and ran them through the fixing solution they no longer had a solution
Explanation:
The development of dental radiographs has three stages:
The first is to place the radiograph in developer, the second to wash it in water and the third to fix the image and define it with fixative.
The developer is in charge of giving the contrast to the radiographic image and the radiopaque-radiolucent colors, if the radiographic plate lasts less time or the developer is altered due to misuse / maintenance, it will not look correctly and will have a dim image appearance.
Identify compounds that are required for the electron transport chain and compounds that are produced by the electron transport chain.
a. ATP
b. NADH
c. O2
d.NAD+
e. H2O
f. ADP
g. FAD
h. FADH2
Answer:
Compounds needed for electron Transport chain are;
NADH
FADH2
NAD+
FAD
O2
H2o
Compounds that are produced are
ADP
ATP
Explanation:
Electron transport chain is a biological process that produced ATP in the body cells which entails building proton motive force that produce ATP.
The main electron transport chain electron donors are succinate and nicotinamide adenine dinucleotide hydrate (NADH).
nicotinamide adenine dinucleotide (NAD+) fuse with a proton to form NADH at the mitochondrial matrix.
flavin adenine dinucleotide (FADH2) plays a similar role as an electron donor.
Molecules such as pyruvate and succinate release energy when they are burned in the oxygen. This oxygen is later reduced to water.
The precursors of ATP, adenosine diphosphate (ADP) and inorganic phosphate (Pi) are transported nto the mitochondrial matrix which later bond to form ATP.
Compounds required for the electron transport chain are NADH, oxygen, and FADH2. Compounds produced by the electron transport chain are ATP, water, [tex]NAD^+[/tex], and ADP.
NADH, oxygen, and FADH2 are substances needed for the electron transport chain (ETC). High-energy electrons are provided to the ETC by the electron carriers NADH and FADH2.
Then, a sequence of protein complexes enmeshed in the inner mitochondrial membrane transfer these electrons. Oxygen serves as the last electron acceptor, resulting in the formation of water.
A proton gradient is produced by the pumping of protons ([tex]H^+[/tex]) across the membrane as the electrons pass through the ETC and release energy in the process.
The ATP synthase enzyme is propelled by this gradient to produce ATP from ADP and inorganic phosphate (Pi).
Thus, the ETC creates the molecules ATP, water, NAD+, and ADP, all of which are crucial for cellular energy production and preserving the electron balance during cellular respiration.
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name the disease caused by a species clostridium?
Answer:
The disease is tetanus and the species that causes it is Clostridium tetani
Explanation:
Clostridium is a gram negative bacteria found in different types of environment including our surroundings and in the digestive tract of organisms such as animals and man.
Clostridium however has different species which are causative organisms of a range of diseases such as tetanus and botulism.
Tetanus is an example of a disease caused by the species called Clostridium tetani
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.
Groups of genes coding for related proteins in _ are arranged in operons Bacteria Plants Protests None of the above
Answer:
Bacteria
Explanation:
Operons are the genetic regulatory system that is found in bacteria. Operons are group of genes coding for related proteins in bacteria.
Operon are consists of structural genes and regulating elements that includes operator and promoter. This feature of operons in bacteria allows protein synthesis according to the need of cell.
Hence, the correct answer is bacteria.
What would happen to a bacterial cell if its protective covering was destroyed? It would be better protected from the outside environment. It would be able to take in materials more easily. It would be harmed by chemicals in the environment. It would reproduce more slowly.
Answer:
it would be harmed by chemicals in the environmenti
If a bacterial cell's protective covering was destroyed - It would be harmed by chemicals in the environment.
The cell wall of bacteriaThe cell wall is a outer layer that surrounds the cell membrane and protects bacteria. It is serve as a protective barrier between inner membrane and external environment.
It is essential for maintenance of cell shape and structure as well as the prevent it from harmfull chemicals present in the environement.
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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
What process occurs as a zygote becomes a blastocyst?
Answer:
The Answer is B.
Explanation:
The process by which a zygote becomes a blastocyst is cleavage division.Thus, option "B" is correct.
What is fertilization and example?A method of reproduction that entagled the union of male and female germ cell (each with a single, haploid set of chromosomes) to create a diploid cell called zygote.
Thus, option "B" is correct, A group of blastomeres produced by cleavage divisions is known as pre-embryo.
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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.
which structure is most necessary for a mitochondrion to produce new molecules
Answer:
The Nucleus.Explanation:
The structure most necessary for a mitochondria to produce new cells is the nucleus.
The nucleus is a very specialized structure that occurs in most cells including the mitochondria.
It is a membrane bound organelle that contains genetic materials which is the DNA of all eukaryotic organisms(multicellular organisms)
It plays important functions such as:
1. Primarily an information center of the cell
2.Metabolism roles
3. Growth and production of new molecules in the mitochondria(mitochondrial bio-genesis).
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.
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.
If each NADH generates "3 ATP" molecules and each FADH2 generates 2 ATP molecules, calculate the number of ATP molecules generated from one saturated 18 ‑carbon fatty acid.
Answer:
90 ATP
Explanation:
Every acetyl-CoA yields 3 NADH and 1 FADH2
18 carbon fatty acid is known to have 9 Acetyl CoA.
1 acetyl CoA produces a total of 10ATP.
Since the 18 carbon fatty acid has a total of 9 Acetyl CoA then the total number of ATP produced is 9* 10 which results in 90 ATP being formed when it passes through the various reaction mechanisms.
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:
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.
Knowing the epidemiology and causative agent of Legionaries disease what questions would you ask of the victims or of their surviving relatives?
Answer:
Answered below
Explanation:
Legionnaires disease is a type of lung inflammatory disease or pneumonia, which is caused by infection from the bacteria Legionella bacterium.
Legionella bacterium can be spread by inhalation from water or soil. People with weakened immune systems are most susceptible as are smokers. Untreated legionnaires disease can progress to a fatality.
Some of the questions to ask of a victim or of surviving relatives include;
1) Any visits to swimming pools?
2) Source of drinking water?
3)Any visits to fountains?
4) Contacts with victims and their personal belongings?
5)Is any relative or victim immunocompromised? Do they have diseases that might lower their immune response?
6) Are they smokers?
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 DNAwhich term describes a female arctic fox
Answer:
organism
Explanation:
Answer:
organism
Explanation:
fkljfakl;sdjflkncmie;alkd
The volume of a right circular cylinder can be approximated as follows:
Volume = πr2h;
where r is the radius of the cylinder and h is the height of the cylinder;
π is a constant that is roughly equal to 3.
Using the simple approximation above, calculate the volume of a right circular cylinder with a radius of 2 meters and a height of 9 meters.
A.
2,916 m3
B.
14 m3
C.
108 m3
D.
324 m3
The correct answer is A.2,916 m3.
What is circular cylinder?A circular cylinder is a three-dimensional geometric shape that consists of two parallel circular bases and a curved lateral surface that connects the two bases. The shape of a circular cylinder resembles a can or a pipe, and it is a common shape in everyday objects and engineering applications.
To calculate the volume of a right circular cylinder with a radius of 2 meters and a height of 9 meters, we need to plug in the given values into the formula: Volume = πr2h. Since π is a constant that is roughly equal to 3, we can use 3 in place of π.
Therefore, the volume of the cylinder is equal to 3 x (2 meters)2 x (9 meters), which is equal to 2,916 m3.
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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.
QUESTION 31 Chipmunk mitochondrial DNA was fingerprinted using the single primer amplified region technique (SPAR) and the PCR reaction. One four base primer was used. If the DNA from chipmunk mitochondria is a circlular piece of DNA about 16000 base pairs long, how many fragments should be produced by this technique
Answer:
It depends on the size of the amplified DNA fragments (for example for SPAR markers consisting of 200 bp in length >> 1600 / 200 = 8)
Explanation:
The PCR based single primer amplification reaction (SPAR) methods are tools for detecting genetic diversity by using DNA markers such as Simple Sequence Repeats (ISSRs), Minisatellite DNA regions (DAMDs) and Random Amplified Polymorphic DNAs (RAPDs), which can be used alone or combined with each other. In the last years, the SPAR methods have gained attention in the scientific community because they are cost-effective and highly effective for the detection of both intraspecific and interspecific genetic variation. In the SPAR methods, the size of the bands will depend on the length of the amplified DNA fragments.
Sophie is preparing a qualitative research plan for her study that explores the stories of young cancer survivors. Of the following, which is Sophie likely to include in her plan?
Answer:
A section that demonstrates the relevance of the study.
Explanation:
A Qualitative research plan, as the name suggests, lays emphasis on conducting a standard study that offers authentic and reliable claims or conclusions. It does not rely on a single source for information but includes different data sources and fieldnotes like interviews, questionnaires, audio or video conversations, etc. carried out in real-life settings by the researcher. All such data is reviewed, organized, and then a claim is made on these bases.
As per the question, If Sophie is willing to research more regarding the young survivors' story of battling cancer, she must produce a section that could illustrate the significance of this study as this helps establish the credibility of her idea as well as her study. This could further be substantiated through the inclusion of interviews of patients and doctors by exemplifying how it helps in reaching more significant conclusions.
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
(4.06 MC)Which statement best compares coastal ecosystems to open ocean ecosystems? a. Coastal ecosystems include abyssopelagic depths, and open ocean ecosystems do not. b. Coastal ecosystems have less sunlight, fewer nutrients, and less diversity than open ocean ecosystems. c. Coastal ecosystems have a greater range of water pressures than open ocean ecosystems. d. Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems.
Answer:
D
Explanation:
Answer:
D.Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems.
Explanation: