Answer:
The correct answer would be d. wild-type.
Wild type refers to the gene, strain, or character which is most commonly found in the population in natural conditions.
The allele or the gene which is found rarely in the population is termed as mutant allele or character.
For example, the wild-type phenotype of fur color of tigers is orange with black strips whereas the mutant phenotype would be a white coat with black strips.
1. natural selection acts on existing traits because you can not evolve into something you didn't have
2. original structures evolve to accomplish new function in order to survive
Answer:
Structure in a chromosome that holds together the two chromatids
Explanation:
Fossils can be used by examine their analogous structures...... give him Brainliest
