Angiosperms use which temporary reproductive structures that are not present in any other group of plants?
A. flowers
B. seeds
C. receptacles
D. carpels
E. cones
Answer: A
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A behavior that can increase reproductive success of an individual male in a species is
A. All of the answer choices are correct. B. direct physical competition for the "right" to mate with a particular female. C. post-mating physical competition to block other males from subsequently mating with the female. D. the removal of the sperm from other males, so that there will be no successful fertilization. E. the ability to produce more sperm can be produced or released.
Individuals with familial Down syndrome are trisomic and have 47 chromosomes
Indicate whether the statement is true or false
Which of the following is the reason for existence of vestigial structures (useless parts of the body)?
a. They must have functioned in the near past. b. They must have functioned in ancestral organisms. c. They must have functioned in other organisms. d. They must have functioned in similar organisms.
Many of the signs and symptoms of inflammation, including redness and itching, are due to the release of (histamines/leukotrienes/proteases) by degranulation of mast cells.
Fill in the blank(s) with the appropriate word(s).