Which of the following is the best definition of mycelium?
a. an association between a fungus and a plant root
b. a mass of hyphae
c. a mushroom
d. a fungal cell
Ans: b. a mass of hyphae
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A goat eats by pulling a plant out of the ground. What does this best illustrate?
a. parasitism b. predation c. competition d. commensalism e. mutualism
Biologists think that all organisms alive today descended from organisms that lived before. In fact, they feel that we can trace any living organism back to the origin of life on Earth. Explain how metabolism fits into this thinking
What will be an ideal response?
Are steroids water soluble?
a. yes b. no
Which of the following groups contains organisms that produce free-living larvae?
a. cnidarians b. echinoderms c. arthropods d. cnidarians and echinoderms e. cnidarians, echinoderms, and arthropods