The identity of an atom can be determined by the number of protons it has. A is the correct answer. I hope this helps!
They are a species, the definition is:
A group of organisms that have similar characteristics and can interbreed to produce fertile offspring
Answer:
D. Parasites take nutrients from another organism's body
Parasites by definition leech off of their hosts by stealing nutrients
The Moon is thought to have come from the Earth. In 1975, the giant impact hypothesis was put forward. This suggests that the Earth was hit by a planet about the size of Mars around the time of the formation of the solar system approximately 4.5 billion years ago, and the impact caused part of the outer layer of the Earth to spin off and form what is now the Moon.
