True or false. animals vary tremendously in structure. nevertheless, they can be categorized into a few basic body plans based on body symmetry, number of embryonic germ layers, type (or absence) of body cavity, and characteristics of embryonic development.

True

Explanation:

Animals can be categorized into 3 based on body symmetry

Animals can be categorized into 2 based on number of embryonic germ layer;

Animals can be categorized based on presence/absence of body cavity or coelom;

Animals can be categorized into 2 based on characteristics of embryonic development;

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

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.