Why are the testes suspended outside the body in humans?
What will be an ideal response?
The core temperature inside the body is too warm for the proper development of sperm, so testes are suspended within the scrotum outside the body. There temperatures are 3°C cooler.
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Which of the following represents a different principle for food preservation?
A. Heating B. Addition of salt C. Freeze-drying D. Smoking
Carbon dioxide can be released into the atmosphere by all of the following EXCEPT:
a) volcanic eruptions b) photosynthesis c) cellular respiration d) burning of fossil fuels
Which of the following forms of energy is NOT one of those thought to have been involved in the production of large organic molecules in the primitive reducing atmosphere?
A. radioactivity B. electrical energy C. heat D. radiation from the sun E. sound
Endotoxins in sterile injectable drugs could cause
A) infection. B) septic shock symptoms. C) giant cell formation. D) nerve damage. E) no damage, because they are sterile.