How far back does the fossil record extend?

a. 1 billion years

b. 560 million years

c. 3 million years

d. 3.5 billion years

Where is DNA found in the cell?

to encourage a yellow pigmentation, micrococcus luteus has to be incubated at a. 0 degrees C b. 25 degree C c. 37 degree C d. 100 degree C

What form of carbon do plants remove from the air?

Where does the sun's rays strike the earth least directly

Both cod and haddock are important commercial fish species. why would it be important for scientists to know more about how these species interact and what they eat?

Which of the following is an unsegmented acoelomate worm? a. flatworm b. annelid c. roundworm d. echinoderm

Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms? A. mechanical isolation B.

From the time of my beginning, my part was made of fibrous material called collagen, which is secreted by

you are running an experiment trying to figure out how water affects plant growth for three orchid plants you recently bought. The orchids are the same species and you will place the plants next to eachother in the same windowsill.

The living world is organized in levels. Biotic and abiotic factors also can be arranged into levels of biological organization. Put the words below in order from the least complex to the most complex