The cell membrane around a cell forms a barrier that protects and regulates the cell. certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. which best describes those that can pass through? a. they are concentrated. b. they are soluble. c. they are diluted. d. they are heated.

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .