How many levels of classification do scientists use today?

Differences between compact bone and cartilage

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.

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated