The main energy source used by humans has changed over time from

A. fossil fuels to solar.

B. wood to wind.

C. wood to fossil fuels.

D. fossil fuels to nuclear.

What is the difference between photosynthesis and respiration?

Once proteins have been produced at the ribosomes what two organelles work together to aid in the secretion process

How old is the average Mum

A student measured the amount of oxygen and carbon dioxide dissolved in an aquarium containing an aquatic plant and a snail. Why did the amount of dissolved oxygen decrease when the aquarium was kept in the dark for 10 hours? A.

Which anatomical description is true of the parasympathetic division of the autonomic nervous system?

What is the main mechanism for regulating hormone secretion?

While on the Galapagos Islands, Darwin noticed that there were a number of species of finches that he theorized descended from a common ancestor.

Proposed mode of DNA replication where one daughter cells gets both strands of parent DNA and the other daughter cell gets both strands of new DNA. a. Bi-directional replication b. Dispersive replication c. Conservative replication d.

Which process can be found in both bacteria and protists?

Use this information to answer questions 6 - 11. Your original population of 200 was hit by a tidal wave and 100 organisms were killed, leaving 36 homozygous recessive out of the 100 survivors.