Which of these cells does not have a nucleus?

a. eukaryote

b. prokaryote

c. animal

d. plant

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 of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

What process decreases the salinity of ocean water? decreased precipitationdecreased melting of glaciersincreased evaporationincreased runoff from rivers