What is the function of cotyledons in many plants?
a. to enclose and protect the seed
b. to act as a short embryonic root
c. to produce pollen
d. to store food reserves
e. to aid in seed dispersal
D
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The rate at which producers convert solar energy into chemical energy is an ecosystem’s ____
a. standing crop biomass b. biogeochemical cycle c. net primary productivity d. efficiency e. gross primary productivity
As early organisms evolved the ability to harness energy from the sun, other organisms began to die out because they were ____
a. destroyed by a meteorite b. outcompeted by multi-celled organisms c. consumed by dinosaurs d. poisoned by oxygen gas e. starved
photosynthesis requires ___________.
Fill in the blank(s) with the appropriate word(s).
Mycetismus is caused by
A. ingestion of food contaminated with fungus. B. ingestion of toxic mushrooms. C. ingestion of milk from a cow that has ingested feed contaminated with fungal toxins. D. inhalation of fungal allergens. E. contamination of a wound with pathogenic fungi present in the skin.