Which is true for the beginning of the Cenozoic era?

A.) Mammals and dinosaurs lived together.

B.) Mammals first appeared.

C.) Dinosaurs had killed all mammals.

D.) Dinosaurs were extinct.

Identify the overall function of the digestive system as digestion and absorption of foodstuffs, and describe the general activities of each digestive system organ

Which response occurs because of the hormone auxin? A. A plant leans toward a light source. B. A seed germinates. C. A fruit ripens. D. A flower blooms.

A marine fish has about 1% salt in his body. The ocean water is 3.5%. Will water move into or out of the fish?

Examine the molecular models of two different substances below. In the molecule on the left, the electrons are not shared equally. In the molecule on the right, the electrons are shared equally.

What is the effect of having a wider sciotic knotch?

The neurons are the structural and functional units of the nervous system. a. True b. False

Which statement best describes a scientific question? It must be based on a hypothesis. It must be supported by data. It must be testable. It must be original.

1. What is the end product of replication?

Oil immersion is used because it increases: A. Resolution B. Contrast C. Refracted Light D. The working distance between the lens and the specimen

One type of anaerobic respiration results in the production of