What do gymnosperms and angiosperms have in common?
A) Flowers
B) Seeds
C) Spores
D) None of these
B
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Which of the phylogenetic trees above best demonstrates cladogenesis?
A. Tree 1
B. Tree 2
C. Tree 3
D. Both Tree 2 and Tree 3
E. Both Tree 1 and Tree 2
Which of the following can cause anemia?
a. red blood cells in short supply b. abnormally shaped blood cells c. a low iron diet d. heavy menstrual periods e. all of these can cause anemia
In what part of the skin is loose connective
tissue found?
a. epidermis b. dermis c. hypodermis d. more than one e. none of these
A researcher detects an increase in the amount of natural killer cells in a laboratory rat and concludes that ________
A) the rat has, or recently had, a viral infection B) the rat does not have any cancerous tumors C) the rat's lymphatic system is not functioning properly D) the rat's internal innate defenses are weakened