The "pre-adaptations" of early arthropods that allowed them to evolve into terrestrial forms were
A) eggs.
B) exoskeletons.
C) vertebral columns.
D) kidneys.
E) lungs.
B
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Select the cellular structure that can be found in both plant and animal cells.
A. Mitochondria B. Chloroplast C. Cell wall D. Vacuole
The reproductive organ in the human female
that is responsible for egg production is the
a. uterus. b. ovary. c. vagina. d. clitoris. e. oviduct
Crossover suppression implies that __________
A) there are no crossovers between homologous chromosomes B) recombinant chromosomes are absent in the progeny C) small inversions have a high frequency of crossover D) nonreciprocal translocations prevent equal exchange of chromosomes, resulting in loss of chromosome fragments E) Both A and C are correct
RNA molecules that function as enzymes
A) form primitive cells. B) are called ribozymes. C) developed from protein-based enzymes. D) degrade proteins. E) duplicate lipid molecules.