Answer: Dinosaurs
Many forms of plants, invertebrates, and fishes evolved during the Mesozoic Era. Since the dinosaurs were the dominant animals on land then, the Mesozoic Era is called the Age of Reptiles. Dinosaurs, however, became extinct even before the end of the Era.
Answer:
The nitrogen gas must be changed to a form called nitrates, which plants can absorb through their roots. The process of changing nitrogen gas to nitrates is called nitrogen fixation. It is carried out by nitrogen-fixing bacteria. The bacteria live in soil and roots of legumes, such as peas.
Answer:
The environment has the greatest effect on the expression of genes when which of the following occurs? relies on meiosis, a process that promotes recombination of genes, for the production of gametes. The ability for people to roll their tongue is dominant to people who cannot.
Explanation:
Answer:
Explanation:
(AZT) was the first antiretroviral drug used in HIV and AIDS. It is expensive and has several adverse effects including nausea, vomiting, blood problems and myopathy. The review of trials found that AZT does delay the early progression of HIV disease, but this improvement is not sustained. AZT alone does not increase survival for people without AIDS.
