Species richness and the relative abundance of each species determine ____
a. the species composition of an ecosystem
b. the species diversity of a community
c. the species composition of a population
d. the species diversity of the biosphere
e. the species diversity in a niche
ANSWER: b
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In angiosperms, a ________________ is contained in the anthers or ovaries, and the ____________ consists of the rest of the plant
A. sporophyte; bryophyte B. gametophyte; sporophyte C. sporophyte; gametophyte D. bryophyte; sporophyte
The identity of flower organs is specified by the spatial expression of three classes of homeotic genes
A. true B. false
Foraminiferan shells are made of
A. cellulose. B. chitin. C. calcium carbonate. D. peptidoglycan. E. silica.
Which of the following statements concerning euglenoids is FALSE?
a. They have a pellicle. b. They have 9 + 2 arrangement of microtubules in their flagella. c. Their cells contain mitochondria. d. They are unicellular. e. They are all photosynthetic.