HS Earth Science Pretest 2017-18 28) According to the Big Bang theory, what was the universe before it became
the universe?
A) empty space
B) a dust of heavy elements
C) a hot and dense region of matter and energy
D) one very large galaxy with an especially strong gravitational pull

d i think its   answer d

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.