Answer:
D. organ systems
Explanation:
Organs and tissues that perform the same function are called organ systems
It is called the seed coat
Answer:
any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures
<span>Animal-like protists are called protozoa. Protozoa are single-celled eukaryotes that share some traits with animals. Like animals, they can move, and they are heterotrophs.
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It regulates on/off like a light switch
