Agraduate student finds an organism in a pond and thinks it is a freshwater sponge. a professor thinks it looks more like an aquatic fungus. how can they decide whether it is an animal or a fungus?

By the structure of their cell wall

Explanation:

Fungus cell contain cell wall with a chitin in it. That differs them from animal cell that doesn't have cell wall, but also differs them from plant cell wall which contains cellulose.

Fungus is a eukaryotic kingdom which contains microorganisms such as  yeasts and molds, but also macroscopic forms such as mushrooms.

Fungus are heterotrophic organisms, often decomposers with high  biodiversity.

answer: c.

explanation:

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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