Animals learn about their surroundings
A. instinctively.
B. by actively exploring their surroundings.
C. from communication with other animals.
D. None of these answers is correct.
B. by actively exploring their surroundings.
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The distance through which a microscopic specimen can be moved and still have it remain in focus is called the
(a) field of view. (b) working distance. (c) depth of field. (d) magnification.
A blood test cannot determine if a person is a carrier of Tay-Sachs disease because the mutant allele is undetectable
a. True b. False Indicate whether the statement is true or false
Using what you know about the nucleic acids, refer to the figure and identify the molecule that is illustrated there.
a. mRNA
b. tRNA
c. DNA
d. ATP
Which of the following is false concerning fertilization?
A) The process can take hours to complete. B) Enzymes are released from the acrosome of the sperm to penetrate the egg. C) Most sperm die on their way to the egg. D) Several sperm must contribute their DNA to the egg.