The variation among individuals, on which natural selection acts, is:
A) physical training and exercise.
B) genetic differences.
C) random occurrences in the lifetimes of individuals.
D) nutritional differences.
Correct Answer:
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Q20: We use the scientific method every day.
Q21: All of the following are important to
Q22: Suppose an organism has an enzyme that
Q23: A change in the genetic makeup of
Q24: In a word, "evolution" means:
A)selection.
B)improvement.
C)nature.
D)change.
Q26: Chromosomes are made of:
A)cells.
B)proteins.
C)organelles.
D)deoxyribonucleic acid.
Q27: Francesco Redi designed an experiment to test
Q28: To test the effect of vitamin D
Q29: Which of the following is/are characteristic of
Q30: All of the following are true of
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