The phyla Bryozoa and Brachiopoda have which feature in common?
A. a radula
B. nephridia
C. setae
D. a muscular foot
E. a lophophore
Answer: E
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Birds are one of two groups of flying vertebrates (bats are the other). Their adaptations to flight include (select all that apply)
A. hollow bones. B. heavy jaws. C. a method of breathing that extracts much oxygen from each breath. D. efficient kidneys that remove metabolic wastes more quickly than is the case in other vertebrates. E. none of these.
If a plant is bending towards the light, one would expect which enzymes to have increased in activity?
A. auxins B. gibberellins C. wall-loosening enzymes D. ethylene E. None of these is correct
The cervix is part of the
a. labium minor. b. ovary. c. uterus. d. oviduct. e. vagina.
The nucleus of a eukaryotic cell is characterized by
A) a double membrane. B) a triple-layer membrane. C) a nonporous membrane. D) a single-layered membrane.