Which hormone stimulates both leaf abscission and fruit ripening?
a. abscisic acid
b. auxin
c. cytokinin
d. ethylene
e. gibberellin
D
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The sexual reproduction of earthworms characteristically is
A. hermaphroditic but cross-fertilizing. B. hermaphroditic but self-fertilizing. C. normal type between individuals who remain as males and females throughout their life time. D. normal appearing, but individuals change sex periodically. E. normal appearing, but individuals reproduce only once in their lives.
Which plants are known for their pneumatophores?
A) cattails B) ash trees C) mangroves D) Spartina
Which of the following statements about tunicates is false?
a. Tunicates are in subphylum Cephalochordata. b. Tunicates are in phylum Chordata. c. Tunicates are freshwater organisms. d. Tunicates develop as deuterostomes. e. Tunicates are a living chordate group
When the diaphragm contracts, the thoracic cavity ________, and you ________
A) gets smaller; exhale B) gets larger; exhale C) gets larger; inhale D) gets smaller; inhale