Differences between a typical animal cell and a red blood cell

Which characteristics distinguish a law from a theory? Check all that apply. A law begins as a testable hypothesis. A law may be demonstrated mathematically. A law is a statement of fact. A law is only an explanation of observations.

Human activity contributes to the extinction of species. Which is not a human activity that contributes to the extinction of a species? a. introducing a nonnative species b. hunting c. fungal disease d. cutting down forests

The jellylike substance that contains dissolved molecular building blocks and in some type of cell organelles is called

What might happen if plants could not produce glucose 1. They would not be green 2. they could not grow and function 3. They could not abrorb engergy from the sun 4. they would not have leaves

Toxins are non-living biological agents produced by living plants, animals, or bacteria. an example of a toxin is:

Fluid filled sacs found between the skin and underlying bony prominences are called

Trees, such as those in the deciduous forest, are very important to the environment. If the number of trees on earth continues to decrease significantly, what might be the result?

List two reasons why amphibians must live in moist environment.

How is the RNA molecule a "script" for the protein production process?

Which of the following statements about maltose are correct? 1. it is formed from two monosaccharide molecules of the same type 2. it is soluble in water 3. it is a reducing sugar