HELP PLEASE! QUICK A. The sponge relies on simple diffusion of water through the pores in the sides of his body to bring plankton to cells in the interior.

B. Flagellated collar cells actively move water through the pores, which increases the rate of plankton and oxygen flow to all cells inside and out.

C. Epidermal cells absorb plankton and oxygen floating in the external environment, and then pass these nutrients to cells in the interior.

D. The large cavity at the top of the sponge provides an access point for plankton and oxygen to move from the external environment into the interior to nourish cells.

HELP PLEASE! QUICK

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.