How are the DNA strands organized?

A) The strands are parallel to one another. The base pairs are not complementary to one another.
B) The strands are antiparallel. The base pairs are complementary and this allows the formation of hydrogen bonds.
C) The strands are parallel to one another. The base pairs are matched with the exact same base pair throughout it.
D) Some strands are antiparallel and others are parallel. This causes some base pairs to be complementary and others are not complementary.

Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above