What were early classification schemes based on?

A. dissection B. observation C. hypothesis D. behavior

Which of the following best defines a gene pool? a. the sum of all genetic traits in a population's individuals at a given time b. any movement of genes from one population to another c. any movement of organisms from one environment to another d.

What can you conclude from the fact that more than a billion species have gone extinct during Earth's history? A. Extinction is a natural part of life on Earth B. Extinction happens only rarely C.

Which of the following is typically included in the count of total carbohydrates on a nutrition label? a. sodium b. protein c. fiber d. cholesterol

How are spores adapted for survival in a land environment/?

A rabbit is feeding on grass when it notices a bobcat and begins to run. What characteristic of life is the rabbit exhibiting? A. growth B. heredity C. homeostasis D. response to environment <<< Right?

What is the energy of a photon first used to do in photosynthesis?

Select the correct statement regarding chemical synapses. A) Cells with gap junctions use chemical synapses. B) The release of neurotransmitter molecules gives cells the property of being electrically coupled.

How can speciation of plants benefit humans

Is cellulose a fat, carbohydrate or protien

I mineral must be formed by a manufactured process to be considered a mineral. T or F