Answer:
Can result in a new variety of gene combinations in the species
Explanation:
The third option is blatantly untrue- gene mutations are sometimes harmful, usually mundane and do nothing, and sometimes extremely helpful.
The fourth option is also untrue- genetic mutation is completely random.
This leaves us with the first two-
The first option is true, but it's not why genetic mutations are important, it's simply how they are passed on.
The second option is the awnser because gene diversity is extremely important in populations, and 'variety of gene combinations' is just another way to say gene diversity.
It is complex because of the many organisms in the ecosystem.
Answer: He didn’t grow a plant without fertilizer.
Explanation: Manu has nothing to compare his plant to. Meaning, he cannot prove that fertilizers help plants grow. He needs to grow a plant with and without fertilizer.
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