Which of the following covers and protects plant surfaces?
a. ground tissue
b. vascular tissue
c. dermal tissue
d. meristem
Answer: c. dermal tissue
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Examine the relationships between the elephants in the figure below. Which one of the following pairs is most closely related?
A) Deinotherium and Platybelodon B) Barytherium and Stegodon C) Loxodonta africana and Loxodonta cyclotis D) Mammut and Stegodon
Given what you now know, what information is most likely to produce the correct answer?
What will be an ideal response?
Which characteristic of a population is a convenient way to express the rate of change within a
population? a. size b. growth c. density d. carrying capacity e. age
Why are waves of calcium that enter cells and are propagated through the cytoplasmic compartment, as happens within the first minute or so after fertilization, generally transient?
a) The ions are changed to calcium salts as soon as they enter the cell. b) The Ca2+ ions are rapidly pumped out of the cytosol and back into the ER and/or the extracellular space. c) The ions are destroyed as soon as they enter the cell. d) Option D: The Ca2+ ions are rapidly pumped out of the cytosol and back into the nucleus.