Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. All seeds require fire in order to germinate.
B. The monocot seeds he used were only able to produce a single cotyledon each.
C. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight.
D. Seeds take more than one season to germinate.
E. The suspensor failed to develop into an embryo within each seed.
Answer: C
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A. Sexual selection B. Natural selection C. Disruptive selection D. Stablilizing selection
The two basic types of deafness are ________ and ________
Fill in the blank(s) with correct word
In the respiratory electron transport chain electrons are passed from ________.
A) NADH and QH2 to O2 B) O2 to NAD+ and Q C) O2 to NADH D) ATP to O2
An aquatic microbe that can grow only near the surface of the water is probably which of the following?
A. a phototroph B. a heterotroph C. a chemotroph D. a lithotroph E. an anaerobe