The Stramenopila are a very large and diverse group that all possess ________ at some point in their life cycle.
A. an exoskeleton
B. heterokont flagella
C. chloroplasts
D. a macronucleus
Answer: B
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How does a cell typically know when to divide?
A) Cells have an internal clock and divide only when they reach a certain age. B) Tumor suppressor genes code for growth factor proteins that initiate cell division. C) Proto-oncogenes code for growth factor proteins that initiate cell division. D) Oncogenes code for growth factor proteins that initiate cell division.
In general, a substance that carries an electric charge can dissolve in water. Given this fact, which of the following would most likely NOT dissolve in water?
A) Ionic compounds B) NaCl C) Nonpolar molecules D) Polar covalent molecules
A single cotyledon found in the kernels of cereal grains.
Choose the LETTER of the best match: A. hypocotyl B. endosperm C. scutellum D. radicle E. epicotyl
Soil in regions with high rainfall or in low-lying areas associated with poor drainage form through the process of
A) laterization. B) calcification. C) gleization. D) podzolization.