C.
A is incorrect because if they have the disease then they cannot be healthy.
B is incorrect because if the genetic disease is recessive then the cannot have the homozygous mutated gene because then it would mean that they are ill.
D is incorrect because having an offspring that is ill doesn't always guarantee that all the offspring will be ill. <span />
Answer:
6. Because of how old the rocks are
Explanation:
6. Sedimentary rock forms in layers because of the order they were formed. The older rocks will form first and as time goes on, rock forms above it to create a new layer, and so on.
<u><em>If wrinkled seeds are dominant, it is a 75% chance, if round seeds are dominant, it is a 25% chance. In this case it's probably 25%, considering round seeds are emphasized.</em></u>
UV rays reacting with the O2 molecules
I might be wrong a little but
Hope the helps :)