The answer is A because the males sperm determines the sex of a baby.The determines sperm is carrying an X or Y chromosome.
I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
A .<span>Decomposition is a chemical change because the organism is broken down into new substances.</span>
Answer:
I think the correct answer is D