How do fish obtain oxygen? a- oxygen diffuses across their skin. b- their body cells break down water molecules (h2o) and release the oxygen. c- they inhale oxygen at the surface of the water. d- they take in oxygen gas dissolved in the water through their gills.

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.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?