Chunks of rock and metal from planetary bodies that survive their journey through the atmosphere and fall to the ground are called meteorites and scientists have found over 50,000 on Earth's surface. What is the origin of the majority these meteorites?

A. They are pieces of a planet that have broken off.
B. They are the original materials from which the planets formed.
C. They are bits of our moon that have eroded and fell back to Earth.
D. They are jarred loose from a meteor belt found among the outer planets.

It should be D. They are jarred loose from a meteor belt found among the outer planets.

Explanation:

Meteors are often space trash from spacecraft and satellites that have broken off. They could also be pieces of planets that have floated into the meteor belt with the space trash, it then falls to the ground as a meteorite.

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.