Which statement about DNA in one of your vrain cells is true?

Answers

Answer 1

Answer:

Answer:

I hoped this helped

Explanation:

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Why are voluntary muscles also known as skeletal muscles?

Answers

Answer:

Skeletal muscle is called voluntary because you can control this type of muscle. You can voluntarily choose to move them. These muscles attach to bones, move the skeleton, and are found in the arms, legs, neck, or anywhere you can voluntarily move a body part. These muscles produce strong contractions.

Explanation:

In the typical cell cycle, DNA synthesis occurs in the _________ phase.

Answers

Deoxyribonucleic acid (DNA) synthesis refers to the creation of a new DNA molecule, which occurs in the cell cycle’s synthesis phase (S phase). Duplication of the centrosome, which organizes microtubules to help insure proper chromosomal segregation during cellular division, as well as DNA replication occur during this phase and are necessary for the stimulation of cellular division. {Synthesis phase}

What is the source of oxygen produced during photosynthesis?

Answers

Answer:

the air

Explanation:

Answer:

Water

(correct me if I'm wrong)

The tiny air sacs inside the lungs are called: larynx alveoli bronchi

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They are called bronchi

Answer:

alveoli

Explanation:

There are two alleles, B and b, at a gene locus in a population at Hardy-Weinberg equilibrium. The relative frequency of the dominant (B) allele is 0.7. What is the expected number of heterozygous individuals if the total population size is 500 individuals?

Answers

Answer:

210

Explanation:

Frequency of dominant allele is represented by "p"

and frequency of recessive allele is represented by "q"

Given

$p = 0.7$

Thus,

$q = 1-p\nq = 1 - 0.7 \nq = 0.3\n$

As per Hardy Weinberg's second equation of equilibrium -

$p^2 + q^ 2 + 2pq = 1\n$

Substituting the given values in above equation, we get -

$0.7^ 2+ 0.3^2 + 2pq = 1\n2pq = 1- 0.49-0.09\n2pq = 0.42$

So the total number of heterozygous individual is equal to

$0.42 * 500\n= 210$

Why do some species employ both mitosis and meiosis, whereas other species use only mitosis?

Answers

They need both mitosis and meiosis if they produce animal gametes. Mitosis is the division of a cell into two identical cells. Meiosis, on the other hand, is the production of sex cells or gametes (sperm and egg). Both processes are needed by animals to reproduce.

The use of mitosis and meiosis varies among species due to their reproductive strategies and life cycles.

Meiosis, which produces genetically diverse gametes, benefits species by enhancing genetic variation and adaptability. Mitosis, on the other hand, generates genetically identical cells and is commonly observed in asexual reproduction for efficient cloning.

Complex life cycles often involve both processes at different stages. Environmental conditions and stability also influence the reliance on either mechanism. In stable environments, mitosis alone may suffice, while meiosis and sexual reproduction aid survival in challenging environments.

Learn more about meiosis and mitosis, here:

brainly.com/question/31658273

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