The second stage of prenatal development begins at about two weeks after conception. at this point, the growing bundle of cells is called an embryo.
Answer:
Researchers also found that the longer a male's tail feathers, the faster he was able to shake them. This effort would require more muscular strength, and might be a powerful signal of fitness to the females.
Explanation:
QUESTION:Which of the following can typically decrease genetic variation?
toxins
predator-prey relationships
competition
new habitat
disasters
increased food supply
ANSWER:
1. toxins
2.predator- prey relationships
3.competition
4.new habitats
5. disasters
Answer:
the main role of ATP is to provide energy
Explanation:
Answer:
The somatic cells of fruit flies contain eight chromosomes, which means they have two sets of four chromosomes. Meiosis is the process by which sex cells are produced. Sex cells are haploid, which means they have one set of chromosomes.
Explanation:
