Answer:
1 = A
2 = B
3 = B
Explanation:
1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.
2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.
3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.
Answer:
This is confusing
Explanation:
man im sorry im not as smart as you
Answer:
Population growth, lack of supplies
Explanation:
Urbanization can impact an area, especially population growth. People could be crowded, and that supplies could run out as it is an urbanized region.
It is believed that this happens because some signals that regulate development are the same between different species and because <span>they share ancient genes. </span>These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.
For example, human and animal embryos go through very similar stages of early development and share similar features such as tails and gill-like structures. The major difference appears to be how long it takes to reach each of these same stages.
Ocean waters absorb the sun’s energy. Sea ice reflects the sun’s energy.
