Doctors once believed that illness was caused by foul air and could not be transmitted from one person to another. Now, doctors know that single-celled bacteria and even smaller viruses cause illnesses and can be transmitted from one person to another. How did the advent of the microscope most likely affect the foul-air theory?

It supported the theory of foul air causing illness and helped the theory become a law.
It provided evidence for other causes of illness, but scientists did not change the theory.
It allowed scientists to change the theory before any new information was collected.
It allowed scientists to see small organisms in sick individuals and change the theory.

what's the question?

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

the answer is b. glad to .