What effects do keystone specie shave on an ecosystem?

A. They make prey species extinct

B. They reproduce biodiversity

C. They keep populations of species balanced

D. They cause primary disturbances.

What type of resources such as fossil fuels, fresh water, and soils are used up or degraded by humans

The nebular model explains a. why the inner and outer planets differ. b. why the planets are all widely separated. c. the presence of comets and asteroids. d. all of the above.

What are small bodies composed of rna and protein that function as protein factories called?

Compare and contrast the cell membrane and the cell wall

Introns are deleted before a gene is transcribed from DNA to mRNA?

Whats the process of Asexual Reproduction for Komodo Dragons?

As you add drops of water to the surface of the penny, each drop sticks to the other water droplet forming a large drop on top of the penny. This is caused by which water property? Question options: adhesion cohesion capillary action

Name the kingdom whose members have a cell wall made of chitin

A population is defined as all of the inhabitants of a given country or area considered together. a. True b. False

How does random fertilization add to genetic variation? a) reshuffling of randomly picked up chromosomes b) random fusion of genetically unique gametes c) exchange of genetic material between homologous chromosomes