Answer:
True
Explanation:
the way you worded the question was weird
As the options of the question are not provided and not found therefore on the basis of previous knowledge a attempt has been made to answer the question.
Answer:
The action potential is generated in the neurons as a result of the movement of two ions mainly sodium and potassium. When the sodium gated channels open then the sodium ion move inside the cell which increases the positive charge. This causes depolarization of the neuron.
Thus, the movement of sodium ions into the neuron causes depolarization of the neuron.
Answer:
Explanation:
<u>a. How many chromosomes does a child receive from its father?</u>
Every person receives half of their chromosomes from their father and half from their mother. For that reason, if humans have 46 chromosomes in each somatic cell, 23 of them come from the father.
<u> b. How many autosomes and how many sex chromosomes are present in each somatic cell? </u>
Each somatic cell has 46 chromosomes in total; of which 22 pairs are autosomes and 1 pair are sex chromosomes. Therefore, 44 chromosomes are autosomes and 2 chromosomes are sex chromosomes (the X and/or Y chromosomes).
<u>c. How many chromosomes are present in a human ovum? </u>
The human gametes (ovum in women and sperm cell in men) have half of a somatic cell's genetic material, so that when they combine in a zygote to create their child, they form an initial cell with 46 chromosomes in total. The ovum therefore has 23 chromosomes: 22 autosomes and 1 sex chromosome.
<u>d. How many sex chromosomes are present in a human ovum?</u>
As I mentioned in the previous question, a human ovum has 1 sex chromosome. That way, when it combines with a sperm cell, which also has 1 sex chromosome, they form a zygote with <u>a pair</u> of sex chromosomes (one that comes from the mother and one from the father).
<span>Modern sea star larvae resemble some primitive vertebrate larvae and this similarity suggest that the primitive vertebrates share a common ancestry with sea stars
it means their ancestors shared some common features so that is why it resemble primitive vertebrate larvare
hope it helps</span>
They're found orbiting around outside the nucleus, because they're electrons
I hoped this helped! :)