What Is Thought to Be the Reason That There Are

question 89

Multiple Choice

What is thought to be the reason that there are no small impact craters on Mars?

• A)Like Venus, Mars's atmosphere is too thick and these meteorites do not survive to makeimpacts on the surface.
• B)The surface of Mars is too young to have impact craters.
• C)Due to the gravitational pull of Mars's moons, most small meteoroids are deflected and nevermake it to the surface.
• D)The wind blows small dust particles, eroding the surface of Mars, erasing small impact cratersfaster than they can form.
• E)None of the above. Mars has lots of small impact craters.

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Definitions:

Blood-testis Barrier

A physical barrier between the blood vessels and the seminiferous tubules of the testes, protecting germ cells from harmful substances in the bloodstream.

Antibodies

Proteins produced by the immune system that recognize and neutralize foreign substances, such as bacteria and viruses.

Reproductive Cells

Cells involved in the reproduction process, including sperm and egg cells.

Testes Temperature

The optimal temperature range required for the testes to produce sperm efficiently, which is slightly lower than the body's core temperature.