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Rasek [7]
3 years ago
7

Who is Charles darwin​

Biology
2 answers:
Sveta_85 [38]3 years ago
7 0

Answer:

Charles Darwin came up with the theory of evolution.

valentinak56 [21]3 years ago
4 0

Charles Darwin is a writer who wrote the book Orgin of species . He is the one that gave the idea of evolution . his proposition that all species of life have decended over time from common ancestors. He is a english naturalist, geologist and biologist

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How many times and during which phase of meiosis do the chromosome replicate?
Travka [436]

Interphase is divided into three phases, G1 (first gap), S (synthesis), and G 2 (second gap). During all three phases, the cell grows by producing proteins and cytoplasmic organelles. However, chromosomes are replicated only during the S phase. It is the preparatory phase for the cell before cell division.

<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>

6 0
2 years ago
Q:- In dogs, the Mexican hairless phenotype never breeds true. When Mexican hairless are interbred the offspring are 2/3 hairles
drek231 [11]

Explanation:

The problem says that the hairless phenotype never breeds true. That means that it's not the result of a homozygous genotype (H₁H₁ or H₂H₂), so it is caused by the heterozygous genotype (H₁H₂).

The <u>expected </u>offspring from the cross between two Mexican hairless would be:

<h3>P                 H₁H₂  x  H₁H₂</h3><h3>F1    1/4 H₁H₁,  2/4 H₁H₂ and 1/4 H₂H₂.</h3>

And the <u>expected</u> phenotypic ratio 3:1. However, the observed offspring shows a 2:1 ratio. What's happening?

If the observed phenotypic ratio in the offspring of a monohybrid cross (a single gene with two alleles) is 2:1, we can suspect that one of the genotypes is lethal in homozygosis and therefore does not appear in the progeny (the puppies are born dead).

If we proposed that the H₂ allele is lethal in homozygosis, then:

  • The H₁H₁ genotype would cause normal puppies --> 1
  • The H₁H₂ genotype would cause hairless puppies --> 2
  • The H₂H₂ is lethal and causes the death of puppies --> 0

The phenotypic ratios change to 2:1, as observed in the experiment.

7 0
3 years ago
Which of the following is NOT an example of an anaerobic exercise?
nikdorinn [45]

Answer;

B. Jumping rope

Explanation;

Jumping rope is not an anaerobic exercise but an aerobic exercise.


Anaerobic exercise is a form of high intensity exercise that increase the oxygen debt. However since the muscles require oxygen to maintain prolonged exertion, anaerobic exercises can only last for short periods of time.

Examples of anaerobic activity sprinting, high-intensity interval training, power lifting and most athletic sports.



3 0
2 years ago
Read 2 more answers
Contractions of the heart generate blood pressure, which is responsible for moving blood through the blood vessels.
malfutka [58]

The contractions of the heart is what creates out blood to pulse through out body and is the basis of our blood pressure; which means this statement is TRUE.


The systolic number (top) of the blood pressure is our heart physically pushing the blood out of the heart and to the rest of the body.

The diastolic number (bottom) of the blood pressure our heart at rest when it has just finished with one pump.

8 0
3 years ago
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The mitochondrion functions in__.
GuDViN [60]

Answer:

ATP synthesis, through cell respiration.

5 0
3 years ago
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