As an oak tree ages, the trunk becomes thicker and woodier due to ________ growth
A) apical meristem
B) secondary
C) primary
D) tertiary
E) determinate
B
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Nearsightedness is also called
(a) myopia. (b) hyperopia. (c) presbyopia. (d) none of the above
Why can scratching or chipping the seed coat speed up the germination of hard-coated seeds like alfalfa?
A. The mechanical stress activates hydrolytic enzymes. B. Water and oxygen can enter the seed to reach the embryo more quickly. C. Carbon dioxide can enter the seed and stimulate photosynthesis. D. Bacteria or fungi can enter the seed and release growth factors. E. Damage to the seed coat triggers the aleurone layer to release amylase.
What kinds of proteins are usually recognized by the cap of a proteasome?
a) proteins with a single ubiquitin b) naked proteins c) precipitated proteins d) polyubiquitinated proteins e) lysinated proteins
The claws (fangs) on the foremost trunk segment of centipedes have a function most similar to that of _____
A) rhinophores B) dorsal plummules C) cerata D) chemoreceptors