The earliest organisms were completely heterotrophic in nature.

The "emergency" part of the nervous system that prepares the body for "fight or flight" is the

Which statement correctly describes the relationship between the human population, technology, and fish population stocks? A.) As the human population grows, and fishing technology increases, fish population stocks decline. B.

Which method is used to construct large, recombinant vectors when polylinker restriction enzymes are not useful? a. recombineering b. FISH c. gene libraries d. YACs e. hybridization

Apps Fossils Which of the following best describes how stingrays compare to their ancient ancestors? A. Stingrays are very similar to their ancient ancestors. B. Stingrays have tails while their ancestors did not. C.

An organisms genetic code is determined by A) the sugar-phosphate bonds in its DNA B) the type of protein present in its cells C) the length of the DNA strands in its cells D) the nucleotide sequence in its DNA

Why are sharks so successful at what they do?

The nucleus of an atom is comprised of

When the double stranded DNA helix is unwound, two single strands of DNA are formed. These strands have to be stabilized because their hydrophobic bases are exposed to water. The proteins that stabilize the two single strands are called

If the fatty acid has two or more double bonds, they are always spaced at three carbon intervals ... explain.

What do you call the sections chromosomes are divided into?