Which statement is true about natural selection? Choose the correct answer.

a. It forms new traits.

b. It acts on variable traits.

c. It forms new genetic material.

d. It acts on genetic material directly.

The most basic level of organization for the body

Which level of classification contains all the others? 60 kingdom domain genus class

Which type of pyramid shows the amount of living tissue at each trophic level in an ecosystem

An important response mechanism in our bodies is blood clotting. The response loop is initiated when injured tissue releases signal chemicals that activate platelets in the blood.

What information does the geologic time scale provide? Check all that apply. list of rock layers by age end date of a geological period places where dinosaurs roamed on Earth reasons why organisms evolve into different species information about when

Which outcome occurs when bonds between atoms are broken or formed? A. a physical change B. an element increasing in size C. a chemical change D. a change of state

What events caused the formation of most islands in the South Pacific?

A new species of plant arises as an allopolyploid from two other plants, one with a diploid number of 14 and one with a diploid number of 18. what would the diploid number of the new species most likely be?

Where do Earth's convection currents occur? the lithosphere tectonic plates the asthenosphere the subduction zone

One disadvantage to experimental research is that experimental conditions do not always reflect reality. true or false