Ruth is 78 years old and recently reported to her ophthalmologist that she has developed some changes in the way she sees colors. Which of the following age-related changes to the eye might best explain her experience? A The corneas in her eyes are changing in their thickness. B The lenses in her eyes are beginning to yellow C The irises in her eyes are losing their elasticity. D The retinas of her eyes are losing photoreceptors.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the growth of the plants is affected by the heat of the light. what is the student doing?

which fault and or fold did you find most difficult to diagram

a bird that nests only in a particular tree species.