<span>Organisms
that expend energy to regulate some or all of their internal conditions are
known as regulators. Regulators are organisms that can control their internal
environment regardless of external environmental change. Regulators achieve this
by homeostatic mechanisms and it requires a lot of energy. Examples of
regulators are mammals and birds</span>
I think the answer would be D since the definition of heredity is <span>the passing on characteristics genetically from one generation to another.</span>
A. Immune system
It helps our bodies fight everything that comes in our path.
Answer:
The ovaries are small, oval-shaped glands that are located on either side of the uterus.
Explanation:
the name porifera means pore bearer in latin. a sponges body is covered by a skin, one cell thick. this skin has lots of small pores ad a few large openings. the small openings are the entrances to a complex system of channels. these collar cells pump water through the entire sponge and filter out food for the sponge cell to eat
