Ascientist took a boat trip across the atlantic. on his voyage, he found a lizard, but was unsure of the species. he used his dichotomous key because he wanted to know where the lizard came from, so he could return it to that general area.

D. for classifying organisms and studying biodiversity

Explanation:

A and C are irrelevant because there was only one organism to observe therefore the scientist could not observe how it interacted with others.  B is irrelevant because the scientist did not have an ecosystem to observe.

Explanation:

i take test

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

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.