Lower Invertebrate Animals: Tutorial
Which characteristic do sponges display when they feed on particles filtered
from water?
o
heterotrophy
o
diffusion
O
osmoregulation

How had the study of mitosis affected scientists knowledge of cancer

Why is excretion necessary to maintain homeostasis?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.