When did the last mass extinction occur?

O

A. At the beginning of this era.

O

B. At the beginning of this period.

O

C. At the beginning of this epoch.

O

D. At the beginning of this eon.

Explain why it is important to monitor environmental parameters when making policies involving resource use.

In Environment A, trees are growing back and some of the larger animals are returning to a logged forest. In Environment B, lichens and moss are growing on a rocky mountainside that was scraped bare as a glacier retreated.

How does this reproductive structure increase the plant's chances of successful reproduction?

Which of the following are true for the scientific method? Select all that apply. The scientific method is an organized process to do science The scientific method is based on personal judgement The scientific method begins with a question The

How many atoms is in this formula? 2C12H6O6

Which of the following is a biotic factor? a. Parasites b. Sun c. Soil d. Temperature

When nucleotide sequence of the cell's DNA becomes altered it causes what

Factors that can alter the level of expression of a gene include Check All That Apply an increase in l temperature. an increase in salinity. exposure to UV radiation. presence of particular energy substrate.

What did Virchow observe that led him to determine one of the main components of cell theory?

Discuss the social and biological construction of race in the United states.