What characteristics of living things best explains why some North American birds fly south for the winter?

How many cups are in 1 liter? Which conversions show a path to the solution? Check all that apply. a. Cups - --> liters - --> quarts b. Liters - --> quarts - --> cups c. Cups - --> gallons - --> liters d. Liters - --> gallons - --> cups

Most of the species in the class ___ lay amniotic eggs.

Which of the choices below is a type of hormone that acts on neighboring cells without entering the bloodstream? 1. local hormone 2. paracrine 3. autocrine 4. circulating hormone?

Which process describes nitrogen fixation? Question 19 options: animals eat plants containing nitrogen and return it to the soil through urination bacteria take nitrogen from the air and convert it to a form usable by plants organisms die and are

In your own words, explain what the summary equation tells you about cellular respiration.

How does the structure of smooth and cardiac muscle differ from the structure of skeletal muscle?

How much of the weight of a cell is water

What does the correlation coefficient indicate about the similarities between the gene expression profile for mike smith and the gene expression profile for patient 4?

Compare and contrast to process of translation of mRNA into a protein on a ribosome between prokariots and eukariots. Focus on the phases of initiation, elongation, and termination, and the different factors that were involved in each of these steps.

In a multicellular organism what accounts for the differences between the different types of cells