Mendel wanted to make sure his starting plants bred true, meaning the:
A) phenotypes of the offspring in each generation could not be predictable.
B) phenotypes of the offspring in each generation were always the same as the parent.
C) peas would always be green.
D) seeds would always sprout.
E) phenotypes of the offspring in each generation would sometimes look like the male parent and sometimes look like the female parent.
Answer: B
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Which of the following is (are) true about predator–
prey coevolution? a. Each species exerts selection pressure on the other. b. Predators are selective agents that favor improved prey defenses. c. Prey with better defenses are selective agents that favor better predator hunting skills. d. All of the above are true. e. None of the above are true.
How far are most leaf cells from a xylem vein?
a. 2.0 centimetres b. 1.0 centimetre c. 0.5 millimetres d. 50 micrometres
Ventilation causes alveoli of the lungs to have ________ the blood in pulmonary capillaries.
A. the same PO2 and PCO2 as B. a higher PO2 and a lower PCO2 than C. a lower PO2 and a higher PCO2 than D. No answer is correct.