The base of the pyramid is built from organisms that primarily

A) are autotrophs.

B) are heterotrophs.

C) consume organisms located above them.

D) are heterotrophic, primary consumers.

A substance that moves across a cell membrane without using the cell's energy tends to move

Each year, about 1.2 million cases of skin cancer are reported worldwide. An increased exposure from environmental conditions is a mjor link to the increase in cases. Based on this information, which is the best conclusion

Without differentiation, complex organisms would not be able to do what?

Based on what you know about eukaryotic chromosomes and genes why do researchers choose to isolate mrna rather than DNA

One of the most common types of bacteria-related diarrhea in the united states, resulting primarily from the ingestion of contaminated water, raw milk, and raw or undercooked meats, is caused by

The ligation you carried out in Laboratory 3 can result in a number of plasmids, but none of these have been replicated in a bacterial cell. What configurations - - supercoiled, nicked circle, and multimer - might the ligated plasmids have?

What skill is a scientist using when he listen to the sound that whales make

13. What is another name for rod shaped bacteria? A. bacilli B. cocci C. spirilla

What process takes place in the large intestine?

Which cell structures are found in plant cells, but not in animal cells?