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gtnhenbr [62]
3 years ago
5

PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.

Biology
1 answer:
Naddika [18.5K]3 years ago
8 0
I’m pretty sure it’s D
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L
FrozenT [24]

Answer:

The base pairs are A and T as well as G and C, SO the answer is.

Adenine to Thymine and Guanine to Cytosine

Explanation:

They bind together to form our DNA strands and are bound because they can only bind to eachother.

3 0
3 years ago
What is the job of helper T cells
Julli [10]

Helper T cells are very important cells in the adaptive immunity. They are required for almost all adaptive immune responses and They also help activate cytotoxic T cells and macrophages to attack infected cells.

I hope this helped, Good Luck!!

4 0
3 years ago
Read 2 more answers
The atomic number of an atom is the number of ______ in the atom's nucleus.
Zielflug [23.3K]

Answer: Protons

Explanation: Every atom is defined by its protons every element. So if it has 1 proton its hydrogen no matter what. If it has 2 protons its helium no matter what and so on. So if you know the number of protons you know the element.

The atomic number tells you the number of protons that are in the core of a particular element.

6 0
3 years ago
Assume that an organism exists in which crossing over does not occur, but that all other processes associated with meiosis occur
expeople1 [14]

Answer:

The options are missing, they are:

a.The daughter cells of meiosis I would be diploid, but the daughter cells of meiosis II would be haploid.

b.The two sister chromatids of each replicated chromosome would no longer be identical.

c.The four daughter cells produced in meiosis II would all be different.

d.The two daughter cells produced in meiosis I would be identical.

e.There would be less genetic variation among gametes.

f.Independent assortment of chromosomes would not occur.

The correct answer is E, there would be less genetic variation among gametes.

Explanation:

Crossing-over or also called recombination is a phenomenon peculiar to meiosis alone. Meiosis is that kind of division that is employed by sexual-reproducing organisms to produce gamete/sex cells. Crossing-over is a process that may or may not occur, if it does, it occurs in prophase of meiosis I, and it involves exchanging equal chromosomal segments between two non-sister chromatids or homologous chromosomes. Crossing-over is the means by which sexually reproducing organisms use to bring about genetic variation among their species.

It is worthy to note that the non-occurrence of crossing-over does not affect the number of chromosomes as a normal meiotic division will always yield haploid gametes right from meiosis I.

Since crossing-over did not occur, the homologous chromosomes (similar but non-identical chromosomes) will separate into each cell during meiosis I, meaning that each cell will have chromosomes that are either maternal or paternal. This will reduce the chance of genetic variation occuring among species.

7 0
3 years ago
Bananas banannana anannananna amannwnwjwjw amakakiwjwkwk akakkwkwkwkkw akakkwkwkwkkwkw akakkwkwkwkkwkw akakkwkwkwkkwkw wkwkwkjwj
Blizzard [7]

WHAT????????????????

7 0
3 years ago
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