When food leaves the stomach it is:

A : completely digested

B : partly digested

C : undigested

D : finished with the digestive system

Populations of organisms that exhibit high degree of variation have a greater chance of survival that populations of organisms that show little variation. This statement is

Why is a cells growth limited

Which of the following marine ecosystems consists of an aphotic zone? A. The open ocean B. The coastal ocean C. The intertidal D. The wetland

What is the function of a cell membrane?

Which best defines the population growth rate? A. a. (birth rate + immigration) - (death rate + emigration) B. (birth rate + fertility rate) - (death rate) C. birth rate - death rate

How is polyploidy defined

In 1665, what structures did Robert Hooke observe through a microscope?

18. Where do the light-dependent reactions take place? . in the stroma b. outside the chloroplasts c. in the thylakoid membranes d. only in chlorophyll molecules

Why did Crocodiles survive the K/T extinction?

The rate at which materials enter and leave thru the cell membrane depends on the cells • A. volume • B. weight • C. mass • D. surface area