An early winter frost preventing further growth in a tomato garden is an example of

a.

carrying capacity.

b.

a limiting factor.

c.

a biotic factor.

d.

indirect observation

What is the smallest unit of many compounds?

Think about Redi's experiment described above. It was one step in building cell theory. What aspect of cell theory did Redi's experiment support? A) All cells come from pre-existing cells. B) Cells are the smallest and most basic unit of life.

A physical system is best characterized as a collection of: Energy that has distinct boundaries Energy that does work Matter that does work Matter that has distinct boundaries

Suppose that you plan to grill a steak, and you add salt as seasoning. Does this cause the cells of the steak to gain water or lose water? Explain

Which statements describe benefits of wireless technology? Check all that apply. Enzo orders his groceries from a smartphone. Micah interacts with people to play video games. Nadia downloads online course books rather than carrying them.

One reason common names are not useful to biologists is that they ... A. are in Latin. B. can apply to more than one animal. C. are too long. D. require the use of a dichotomous key. what is the answer nd why?

A species of butterfly has alleles for wing color that are either blue or orange. When a blue butterfly and an orange butterfly mate, their offspring have wings that are both blue and orange. Explain the process through which wing color is expressed.

Low blood levels of oxygen can bring on? A. Sneezez B. Hiccups C. Coughs D. Sighs

How do human activities increase the occurrence of species extinction?

Describe Coriolis effect and explain why it affects ocean currents.