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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology