<span>The correct answer is a. the overuse of fertilizer lead to reduced crop yields over time. This was unexpected because it is common for fertilizers to increase the yields and the quality of the product, but what happens over time is the opposite so it can be said that it's an unexpected consequence.</span>
Answer: It is b multiple alleles
Explanation: Alleles determine your genes.
Answer:
They are in a fixed ratio
Explanation:
The correct answer is (C) :))