Select the correct answer.
Based on these descriptions, which man is impotent?
Jacob has a low sperm count.
Reuben has a blocked vas deferens
Leon is unable to sustain an erection.
Troy's testes have not descended into the scrotum.
A. Jacob
B
Reuben
C. Leon
D.
Troy
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The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.