Flowers which contain only male or female structures are called
A. clones.
B. gametophytes.
C. imperfect.
D. perfect.
Answer: C
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What is the function of the major histocompatibility complex?
A. It promotes phagocytosis by binding to antigens. B. It facilitates antigen recognition by T cell receptors. C. It triggers endocytosis of the antigen. D. It stimulates cell division.
Green sulfur bacteria are nonmotile but can control their depth by using gas vesicles to control buoyancy.
Answer the following statement true (T) or false (F)
Unsaturated fatty acids
a. have fewer hydrogens than saturated fatty acids. b. are more characteristic of animal fats than plant fats. c. contribute to the possibility of arteriosclerosis. d. have no double bonds. e. are solid at room temperature
The field of study involved in sequencing the genomes of organisms is ________.
Fill in the blank(s) with the appropriate word(s).