The DNA (deoxyribonucleic acid) is the double helical in structure. It has two anti parallel strands of long polynucleotides. The nucleotides are two purines ( adenine and guanine) and two pyrimidines ( thymine and cytosine). These purines and pyrimidines are attached with their complementary. Adenine pairs with the thymine with the two hydrogen bonds and the guanine pair with cytosine by three hydrogen bonds. The two strands are twisted which is responsible for the helical structure. The overall charge on the DNA molecule is the negative charge.
Natural selection is the idea that species that acquire adaptations favorable for their environment will pass those adaptations to their offspring. Eventually, only individuals with those favorable adaptations will survive.
Because the genes can come from distant relatives of either parent. The environment may also affect their features
This may occur<span> at ribosomes free floating in the cytoplasm or directed to the endoplasmic reticulum by the signal recognition particle
hope this helps</span>
Answer:
D sounds like the best answer to me
Explanation:
