Which feature is not found in protozoans?
A) usually heterotrophic
B) performs photosynthesis
C) unicellular
D) no cell walls
E) may reproduce sexually or asexually
Answer: B
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An ancestral ____ gave rise to animals including mammals, lizards, turtles, and birds
a. amniote b. reptile c. archosaur d. dinosaur e. archelosaur
Most monoploid individuals do not survive because
A) they do not have the appropriate gene dosages. B) their cells cannot divide properly. C) recessive lethal mutations cannot be masked by dominant alleles. D) they have missing genes. E) they have only one sex chromosome.
Approximately how long ago did the first distinctly human ancestor appear?
A) 10,000 years ago B) 100,000 years ago C) 5 million years ago D) 10 million years ago E) 3 billion years ago
In monocots such as palms considerable increase in girth is achieved by:
a. secondary growth. b. primary growth. c. a modified form of primary growth in which parenchyma cells divide and enlarge. d. enlargement of primary xylem. e. enlargement of primary phloem.