What is the major evidence that sea-floor spreading creates new lithosphere? Explain your answer.

Which of the following best shows how primary structure relates to protein function

Which of these layers is typically thinnest? A. A horizon B. B horizon C. O horizon D. C horizon

In angiosperms, each pollen grain produces two sperm. what do these sperm do?

A guitarist strums two strings of the same thickness on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the strings? A. The first string has a higher pitch than the second string. B.

A food handler does not need to worry about time and temperature

Process by which mineral salts enter into the plant

which type of macromolecule is a new drug most likely to be? A. a lipid B. a nucleic acid C. a protein D. a carbohydrate

Those parts of a new mRNA transcript that get spliced out and don't wind up getting translated into proteins are called: a. exons b. spliceosomes c. introns d. protons

Which type (s) of respiration use glycolysis, the Krebs cycle and electron transport?

Identify the chemical equation for photosynthesis and explain why it is necessary for the survival of animal species