The idea that speciation occurs in bursts, between long periods of genetic equilibrium is called -

a. punctuated equilibrium.

b. stabilizing selection.

c. genetic drift.

d. gradualism.

An experiment wants to find the wind speed that begins to lift an airplane. The strategy is to use a 1/32 scale model and wind tunnel. Why is this strategy valid? a. A wind tunnel is available for the experiment. b.

14. According to Model 3. what is the stimulus and what is the response cuting childbirth

8. Classification of living things takes into consideration all of the following except A. presence of cell membranes. B. mode of nutrition. C. presence of a nucleus. D. number of cells.

If a dna molecule of 50 base pairs contains 15 cytosine bases (c), how many thymine bases will it have?

Which statement about hydropower is correct? A. Hydropower is a renewable resource that has no impact on local ecosystems. B. Hydropower is a renewable resource that can be harmful to local ecosystems. C.

This is the only part of a dna/rna nucleotide that changes. it is found along with the 5-carbon sugar and the phosphate group.

The mineral particles found in the layers of a soil, including the topsoil and subsoil layers, were originally weathered from A. the soil's humus. B. organisms living in the soil. C. the soil's parent material. D. the soil's groundwater.

All ecosystems are affected by wildfires equally.

In order for an electrical message to be sent from the axon of one neuron to the dendrite of another neuron, it must transverse a space called the

Which object mos likely exerts the strongest gravitational pull on other objects