Answer:
Genetic Drift
Explanation:
Evolutionary change can and does occur without natural selection. This usually occurs as a result of genetic drift: genetic mutations that may result in neutral or even negative outcomes.
The term 'GENETIC DRIFT' is used for genetic mutations that may result in neutral or even negative outcomes (Option A).
Genetic drift refers to random fluctuations in the frequency of a given gene variant (i.e. an allele) and different genes in the individuals that form a population.Genetic drift may occur on neutral or negative alleles carried out by the individuals of a population.These random fluctuations cause changes in the allele frequencies, which are fixed when they reach a frequency equal to one (1).In conclusion, the term 'GENETIC DRIFT' is used for genetic mutations that may result in neutral or even negative outcomes (Option A).
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which of the following events does not occur in spermatogenesis
Answer:
The mitochondria and Golgi apparatus are packaged into the head of the sperm.
Explanation:
Spermatogenesis is the production of male germ cells. Sufficient stimulation with sex hormones, especially testosterone, and a lower temperature, which is achieved by placing the testicles in the scrotum, are required for the correct course of spermatogenesis. Sperm production has three phases: reproductive, growth and maturation. At the beginning of sperm development are spermatogonia, which are male primordial cells. They have a spherical shape and are located at the edges of the seminal canals. Spermatogonia is mitotically divided. On the one hand, in order to preserve their numbers, and on the other hand, their division produces primary spermatocytes, which lie above the layer of spermatogonia. Primary spermatocytes are diploid, but after the first meiotic division, haploid secondary spermatocytes are formed from them. They still have double chromatids, so a second meiotic division soon occurs, the product of which is spermatids. Spermatids are already fully haploid and do not divide further. Spermatids then undergo a process of spermiogenesis, in which the nucleus condenses, forming a flagellum and losing most of the cytoplasm and some organelles. Immature sperm travel through the seed-forming canals to the epididymis, where they are definitively matured. This whole process takes about 72 days.
Throw one for the real one wanna see my grills
Answer:
dayum
Explanation:
please mark me as brainliest :)
Where do consumers get most of their nitrogen?
Answer:
Consumers eat plants or other animals to get their nitrogen.
Explanation:
T Lymphocytes can bind proteins in their native form.
True or false
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Many substances become more ductile as the temperature is increased.
A. True
B. False
Answer:
It's true
Explanation:
I don't really know, it just sounds right
I've lost my charisma
Cancer is a disease of the cell cycle. Which of the following is NOT true of cancer cells? Cancer cells engage in uncontrolled cell division. Cancer cells ignore signals that should cause them to stop dividing Cancer cells exit the cell cycle (stop dividing) when abnormal cellular activity is deteced.
Answer:
Cancer cells exit the cell cycle (stop dividing) when abnormal cellular activitiy is detected is your answer.
Explanation:
This is the answer because cancer cells are what cause tumors which are basically when cells are dividing uncontrollably. Cancer cells never ever exit cell cycle they are always repeating it causing abnormal production of cancer cells so the last answer cancer cells exit the cell cycle is false making it the answer for this question.
___________ is the measurement of the height above sea level. Question 3 options: Latitude Longitude Altitude Humidity
Answer:
Altitude
Explanation:
Its the elevation of an object above sea level.
Answer: the answer is altitude
Explanation:
i took my quiz and got it right
hope its help;)
In elephants, poofy tails (T) are dominant to scraggly tails (t) A poofy tailed mother is matedwith a scraggly tailed bull. Since elephants do not have a large amount of offspring, theyproduced two puffy tailed calves.
Gas, coal and other minerals are non-renewable resources. They take way too long for more of them to be made for us to use them.
True
False
Anything that elicits an immune response is called a
Answer: antigen. brainliest?
Explanation:
Which gene may play a role in patterning the forelimb?
Answer: Posterior HoxA and HoxD genes play important roles in patterning along the proximodistal axis of the forelimb (10–13). They also are required for activating and maintaining Shh expression in the developing forelimb (6, 7). mark brainliest
Explanation:
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C. the alge, zooplankton, insect, and bluegill populations would all be affected.
Answer:
i think it is c i hope this helps
Explanation:
When the North Pole is tilted closest towards the sun, it is possible for areas within the Artic Circle to experience 24 hours of sunlight.
A. True
B. False
Answer:
please give me brainlist and follow
Explanation:
From the North Pole, the sun is always above the horizon in the summer and below the horizon in the winter. This means the region experiences up to 24 hours of sunlight in the summer and 24 hours of darkness in the winter.
I think now you can choose it is true or false
Provide one example of Mutualism.
You must explain: The two organisms, how they both benefit, and any other necessary information to explain their interaction.Immersive Reader
Answer:
Cattle and egret
Explanation:
Mutualism is a type of symbiotic relationship involving two organisms whose actions cause them to benefit from one another. In other words, both organisms do one another a favour, hence, the relationship is said to be MUTUAL.
- An example of a mutualistic relationship is that of CATTLE AND EGRET. Cattle gets infested by certain parasites like ticks and fleas, which feeds on their blood. Egrets are bird species that flock around cattle to feed on these insect parasites. This relationship is mutual because, egrets help the cattle get rid of their parasite problem (cattle benefits) while the cattle provides food for the egrets when they harbor these parasites on their body (egret benefits).
The above graph shows how temperature affects the rate of a reaction that uses the catalase enzyme. What trend is shown by the graph?
A.
Between zero and twenty-seven degrees Celsius, the rate of the reaction increases as the temperature increases.
B.
Between thirty-seven and sixty degrees Celsius, the rate of the reaction increases as the temperature increases.
C.
Between zero and twenty-seven degrees Celsius, the rate of the reaction decreases as the temperature increases.
D.
Between sixty and one hundred degrees Celsius, the rate of the reaction decreases as the temperature increases.
Answer:
the answer is A.
Explanation:
B and C are wrong because they are describing the opposite of what is happening in the graph. D is wrong because there is no change in the reaction rate between 60 degrees and 100 degrees.
The rate of the reaction rises with temperature between zero and twenty-seven degrees Celsius, hence option A is correct.
How does enzyme activity is affected?At various temperatures, catalase functions in different ways. The catalase enzyme becomes more active as the temperature rises from 0°C to about 30°C Up to 100°C, and catalase activity declines as the temperature rises.
The hydrogen bonds between molecules of hydrogen peroxide relax as the temperature rises toward the optimal point, facilitating catalase's reaction with the molecules.
Temperature raising speeds up a process, and lowering temperature slows it down. If the temperature rises over the optimal range, the enzyme denatures and its structure is destroyed.
Therefore, but extremely high temperatures can denature an enzyme, causing it to lose its form and cease functioning. Every enzyme has a preferred pH range, hence option A is correct.
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A bacteria structure involved in motility.
Answer:
flagella
Explanation:
Thin long thread like structure that help in locomotion in bacteria.
what is the name of the substance that facilitates the action of lipase
Answer:
The Pancreatic Lipase.
Explanation:
I am not completely sure, its been a while. I really hope this helps
Answer:
the pancreatic lipase
Explanation:
from which part of the alimentary canal!
is this cross section taken
Answer:
I believe this is a traverse cross section of the gut.
Explanation:
fI cant tell for sure given it is not labeled with the submucosa or ILM but the shape and characteristics portray that. If this is not correct then respond with a comment as it could be a section. I have included a photo for refrence for this section
A skin cell has just divided. In which order will its daughter cells undergo the next steps of the cell cycle?
A. Separation of cell contents➡️separation of chromosomes➡️cell growth and DNA replication
B. Cell growth and DNA replication➡️ Separation of cell contents➡️ separation of chromosomes
C. separation of chromosomes➡️ Cell growth and DNA replication➡️ separation of cell contents
D. Cell growth and DNA replication➡️ separation of chromosomes➡️ separation of cell contents
Answer:
madre mía el bicho and is B
Which of the following statements is true?
Earth's atmosphere helps it maintain a constant temperature.
Condensation is the process by which water changes from a liquid into a gas.
Plants do not perform respiration.
Animals add water to the atmosphere through photosynthesis.
Earth's atmosphere helps maintain a constant temperature.
Answer:
hello there your answer is A:Earth's atmosphere helps it maintain a constant temperature.
Explanation:
please mark other guy as brainllest.
have a nice day
[o]-[o]
\___/
An energy pyramid is shown below.
tertiary
consumers
secondary
consumers
primary
consumers
producers
N
What does the energy pyramid demonstrate?
Answer:
tertiary consumers
tertiary consumers
tertiary consumer
tertiary consumer
how is the ratio of gas produced during fermentation related to yeast glucose solution
Which type of stem supports giant trees?
A. herbaceous
B. gummy
C. woody
D. leafy
The type of stem that supports giant trees is woody, which is option C. Woody stems are the type of stems that support giant trees, so the correct option is option c.
Woody stems are characterized by their hardness and rigidity, which are due to the presence of wood tissue. This wood tissue provides structural support and allows the stem to grow thicker and stronger over time. Giant trees, such as oak, maple, pine, and redwood trees, have woody stems that enable them to reach great heights and support their extensive branching systems. Herbaceous stems, on the other hand, are softer and more flexible. So the correct option is option C.
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Question 21
Neurons of the cerebral cortex never dip into the medulla.
O True
O False
Answer:
False
Explanation:
The cerebral cortex refers to the outer layer of the brain. This layer is formed by a thin film of nervous tissue that surrounds the surface of the cerebral hemispheres, with primates having a much more developed cerebral cortex than other animals.
the cerebral cortex is a thin layer of neurons and neuronal connections which is embedded in the neocortex(the neuronal cells of the cerebral cortex which form in the deep layer), it is not homogeneous, since it is made up of six layers of cells, each with specific and specific functions.
Which of the following does NOT occur during interphase?
1.each chromosome replicates
2.the nucleus disappears
3.microtubules extend from centrosomes
4.centrosomes are duplicated
Answer:
The nucleus disappears
Explanation:
The nucleus does not disappear in interphase but instead, the cell grows and splits to make another duplicate of the cell. Which means the cell will also split to make another duplicate nucleus.
In all the laboratories the benches are placed at right angles to windows. Why
Answer:
in case of emergency
Explanation:
Sanjay is travelling on his cycle and his
Answer:
could u add more context?
Explanation:
By which process do plants lose their water to atmosphere
Answer:
I believe your answer is evaporation
Explanation:
the liquid inside the plant is heated by the sun and evaporates into the atmosphere by the way please DONT click on link answers!
1. Define physical change.
Explanation:
physical change is the change which does not cause change in its chemical composition like shape,size,colour,odour,melting point,boiling point etc
Please help, thank you
Answer: what does the question say i cant see the attachment?
Explanation:
Answer: 3. anticodon, 4. amino acid, 5. In stage one, glucose is broken down in the cytoplasm of the cell in a process called glycolysis. 6. The process of gene expression involves two main stages: Transcription: the production of messenger RNA (mRNA) by the enzyme RNA polymerase, and the processing of the resulting mRNA molecule. 7. 64. 8. One codon, AUG, specifies the amino acid methionine and also acts as a start codon to signal the start of protein construction. There are three more codons that do not specify amino acids. These stop codons, UAA, UAG, and UGA, tell the cell when a polypeptide is complete. 9. In the process of translation, the mRNA attaches to a ribosome. Next, tRNA molecules shuttle the appropriate amino acids to the ribosome, one-by-one, coded by sequential triplet codons on the mRNA, until the protein is fully synthesized. When completed, the mRNA detaches from the ribosome, and the protein is released. plzz mark brainliest
Explanation: