Which of the following is an example of homologous structures?

a. whale hip bones.
b. embryos of fish and birds both make gill slits.
c. mice and chicken differ by only 25 amino acids when they make hemoglobin protein.
d. rabbits and birds have the same bones in the same order in their forelimbs, even though they use them for different purposes.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant