A coin is flipped four times. What is the probability that it will land on tails all four times?
a. 1/8
b. 1/4
c. 1/16
d. 1/2
Ans: c. 1/16
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Which cell is NOT involved with the defense response?
a. erythrocytes b. neutrophils c. lymphocytes d. eosinophils e. monocytes
What is the outcome of the process illustrated in the accompanying figure.?
a. One male and one female cell b. Four new but genetically distinct cells c. Two new but genetically distinct cells d. Two new genetically identical cells that differ genetically from what they were before e. Four new genetically identical cells that differ genetically from what they were before
During the ______, the sun's direct rays fall on equator, and the length of day and night is equal everywhere.
A. June equinox B. September solstice C. June solstice D. March and September equinox E. June and December solstice
Species with populations that are likely to rise and fall rapidly in reaction to variations in the environment are referred to as ________ species
Fill in the blank(s) with correct word