The vertebrates that lack jaws are called
A. turtles.
B. lampreys.
C. rays.
D. eels.
Answer: B
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The algal ancestors of land plants are most likely similar to the
a. Rhodophyta. b. Phaeophyta. c. Chrysophyta. d. Charophyta. e. Radiolaria.
In order for a muscle to contract, calcium ions released from the sarcoplasmic reticulum must bind to
A. myosin. B. ATP. C. tropomyosin. D. troponin. E. actin.
What are responsible for the rapid mobilization of
the immune response after a subsequent attack by a pathogen? a. naive B cells b. naive T cells c. NK cells d. memory cells e. macrophages
Amino acids and other organic molecules were formed in the laboratory of Miller and Urey from
which of the following? a. heat, electrical discharge, water, nitric oxide, and carbon dioxide b. heat, ultraviolet radiation, water, carbon dioxide, and amines c. heat, infrared radiation, water, carbon dioxide, and free nitrogen d. hydrogen, methane, water, ammonia, and electrical discharge e. ultraviolet radiation, electrical discharge, carbon dioxide, nitrogen, and ammonia