The question of biological evolution is still disputed among scientists.

What is the main reason mutual insurers are restructuring their corporate structures?

Which of the following is characteristic of protostomes?

Which of the following is the defining characteristic of the clade Ecdysozoa for which this group is named?

Global warming, as demonstrated by observations such as melting of glaciers, rising sea levels, increasing CO2 levels, and increasing average global temperatures, has already had many effects on populations of living organisms. Research at what level of biology that we’ve discussed in class would best address this phenomenon?

A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat, and 5 differences from a frog. These data suggest that the new organism

Which of the following chordate characteristics contributes most to the formation of your ears?

A molecule that is phosphorylated

When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not just a proton), the molecule becomes

The adaptation that freed vertebrates from water for reproduction and allowed them to radiate into diverse terrestrial environments was the _____.