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 biologist finds out that the fruit fly, Drosophila, makes a protein in its eyes that has a very similar structure when compared to a human protein that was just discovered in the newly sequenced human genome.

Is nucleotide a carbohydrate lipid protein or nucleic acid

What organisms in the lake require oxygen to survive?

What are the structures of the respiratory system and of the circulatory system that exchange gases with each other?

What level of classification is found between class and family?

Gel like substance inside the cell but outside the nucleus

The graph of a function increases twice as much over each subsequent equally sized interval. Which of the following could be the parent function of the graphed function?

Fenway park, home of the boston red sox, is situated on land that was once a fen, a kind of wetland. the replacement of the fen is an example of what? pollution overexploitation habitat destruction competition

Explain how the terms set below is related: Heterotroph, omnivore, carnivore

Which of the following are atoms of the same element? Check all that apply. an atom with eight protons and seven electrons an atom with nine protons and seven electrons an atom with eight protons and eight electrons an atom with eight protons and no