A distinguishing feature of the Squamata is their
A. hard shell.
B. kinetic skull.
C. external fertilization.
D. shell-less eggs.
B. kinetic skull.
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Which of these species had members who moved out of Africa?
A) Homo erectus B) Homo ergaster C) Homo habilis D) Homo sapiens E) Homo sapiens and Homo erectus
Which of the following is/are true of most of the extreme thermophilic Archaea in the phylum of Crenarchaeota?
A. They are acidophiles B. Their cell walls contain lipoprotein and carbohydrate C. They are sulfur dependent D. Unlike most other Archaea, their membrane lipids are similar to those of the bacteria E. They are sulfur dependent, they are acidophiles, and their cell walls contain lipoprotein and carbohydrate
G proteins are inactivated when ____
a. GDP is converted to GTP b. GTP is converted to GDP c. the G protein rebinds the receptor d. the G protein is released from the receptor e. the receptor is broken down
Which of the following is NOT associated with meiosis?
A) Reduction of number of chromosomes B) Germ cells C) Sperm and egg D) Somatic cells E) Sexual reproduction