All known species can be grouped into three
domains. What are they?
a. prokaryotes, bacteria, and eukarya.
b. prokaryotes, archaea, and eukarya.
c. plantae, bacteria, and archaea.
d. bacteria, archaea, and eukarya.
e. bacteria, archaea, and protista.
D
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Hinge joints allow movement in two dimensions (flexion and extension). Which of the following is an example of a hinge joint?
A. the hip joint B. the joints between bones of the skull C. the elbow D. the shoulder joint
"Plan B", the most widely used emergency contraceptive, delivers a large dose of which hormone?
a. estrogen b. luteinizing hormone c. oxytocin d. progesterone e. prolactin
Which cellular component of blood helps in clotting?
A) red blood cells B) white blood cells C) plasma D) platelets
Genetic elements known as promoters are initiation points in the process of
A) DNA replication. B) transcription. C) translation. D) mutation repair. E) transformation.