Which sterol, often associated with heart disease, is a crucial component to the structure and function of
cells?
a. cholesterol
b. triglycerides
c. phospholipids
d. cortisol
e. estrogen
A
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The simplest entity that exhibits all of the properties of life is called a(n)
a. cell. b. molecule. c. organ. d. tissue. e. organism.
The vegetation of tundra is dominated by
A) broadleaf deciduous trees. B) short plants such as sedges, heaths, and willow. C) needle-leaf evergreen trees. D) sclerophyllous broadleaf evergreen shrubs.
Which of the following is a plant cell type that is commonly found in and gives support to vascular tissues in stems
and leaves?
a. sclereids b. fibers c. stomata d. parenchyma e. collenchyma
Which pairing between evolutionary evidence and a biological discipline is NOT correct?
a. pesticide resistance: historical biogeography b. forelimbs of all four legged vertebrates are homologous: comparative morphology c. short tails of African and Asian monkeys: historical biogeography d. gill pouches in embryos of four-limbed vertebrates: comparative embryology e. species on islands often resemble species on the mainland: historical biogeography