Geothermal energy is an alternative energy source, although it is not resourceful enough to replace more than a minor amount of the earth’s energy needs. why is this? a. the center of the earth is not hot enough to make a significant energy contribution. b. once the cool water is poured down the well and filters through the rocks, the rocks cool off and are no longer hot enough to turn water into steam. c. drilling through the earth to reach areas hot enough to create steam is possible, but very expensive and difficult. d. there are only a few places where the earth’s core is hot. it is cool in places like antarctica.

B or C

A and D are stupid

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.