When the Earth formed, the radioactive materials that naturally occurred in the environment heated the planet. These radioactive materials generate heat when they decay. This heat generated is then transferred to the surface of the Earth.
The radioactive materials have no role in increasing the gravity of the Earth or poisoning the soil. Moreover, the naturally occurring radioactive materials are still present and has not disappeared.
Hence, the answer is heated the planet.
Good as new hope u do well
Answer:
Mitochondria
Explanation:
I guessed there is no picture
The endocrine gland is the one that is ductless an release its secretion directly in bloodstream example liver, pancreas, etc. The given statement is true and the correct option is B.
<h3>What is endocrine gland's secretion called?</h3>
The secretion of endocrine gland is referred to as hormones, which are chemical messengers that helps in body's control and coordination.
The endocrine gland is the one that is ductless an release its secretion directly in bloodstream example liver, pancreas, etc.
Thus, the given statement is true and the correct option is B.
For more details regarding endocrine gland, visit:
brainly.com/question/11312688
#SPJ1