A population with five males and five females is an example of
A. age distribution.
B. gene flow.
C. sex ratio.
D. reproductive capacity.
C. sex ratio.
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The combining form Xanth/o- means?
The theory of catastrophism
a. was proposed by Lyell. b. indicates that a series of disasters necessitated separate acts of creation to replace species that became extinct. c. states that one worldwide disaster led to massive extinction and subsequent replacement by a new creation. d. held that after geologic events caused extinctions, the world was repopulated by the surviving species. e. has absolutely no basis in fact because extinctions just happen with no apparent patterns.
Which cell is NOT involved with the immune
system? a. erythrocytes b. neutrophils c. lymphocytes d. eosinophils e. macrophages
Which one of the following produces small "fried-egg" colonies on medium containing horse serum and yeast extract?
A) Chlamydophila B) Legionella C) Mycobacterium D) Mycoplasma E) Streptococcus