How might variation in the color of beetles help them survive ?

What do butterflies have on their feet which allows them to sense different strengths and types of nectar? a.mechanoreceptors b.acoustic receptors c.substratum receptors d.chemoreceptors

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?