The answer is a pathogen
If this answered help you then please consider marking it as brainliest to help me level up to expert
I hope that it is correct
Answer: crossing over
during the process of fertilization, a sperm and egg join together to create a zygote. since a sperm had half the number of chromosomes and an egg has half the number of chromosomes, when they join together the zygote had a complete diploid set of chromosomes. the assortment of chromosomes and crossing over promotes genetic variation during the process of reproduction
Answer:
the chemical weathering contributes to metamorphic rocks
Explanation:
