The leaf arrangement illustrated in Figure 34-1 is:
a. pinnate.
b. alternate.
c. compound.
d. whorled.
e. parallel.
B
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Testosterone is produced in the __________ under direct stimulation by __________
hormone.
a. testes; luteinizing b. pituitary; follicle-stimulating c. testes; follicle-stimulating d. pituitary; luteinizing
Most plant cells are pluripotent, meaning that they
a. constantly switch tissue types throughout their lives. b. cannot change after differentiating into a specific cell type. c. end up as a hybrid of tissue types. d. can function in any environmental condition. e. retain the ability to change cell types when necessary.
Arbuscular mycorrhizal fungi invade plant roots, with many species forming mutualistic associations that benefit both the fungus and the plant.
Answer the following statement true (T) or false (F)
You find some rather strange plants in your backyard. They consist only of thin, pale yellow stems that are wrapped around other species of plants growing nearby. You experiment by unwrapping some of the strange yellow plants and planting half of them alone in pots of soil and half in pots with other plants from your yard. You water and fertilize both sets of pots, but after a few weeks you find that the yellow plants that were potted alone have died, while those potted with other plants are thriving. What term would you use to describe the strange yellow plants?
A. holoparasitic B. asexual C. monophagous D. aposematic E. hemiparasitic