Which is the best definition for density? a. the amount of space an object takes up. b. the amount of mass in a given space. c. the measure of the force of gravity on an object.

This organism is not capable of performing photosynthesis. (horseshoe crab) true false

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems