Which of the following is a consequence of water polluted by human sewage?

a. pathogens

b. disease vectors

c. high levels of contaminants

d. all of the above

This is a problem on blood type. each parent has 3 alleles, {a, b, o}. each parent gives one allele to the offspring, and the combination (known as genotype) determines the blood type of the offspring, {a, b, ab, o}.

Which statement best distinguishes the light-dependent (L-D) reactions from the light-independent (L-IND) reactions? The L-D reactions occur in the thylakoid membrane, and the L-IND reactions occur in the stroma.

How many locules are in the ovary of a lily?

Which base is normally used in the synthesis (making) of RNA but not in the synthesis (making) of DNA?

5. If forests serve as important sinks for greenhouse gases, describe how past ice ages might have affected the concentration levels of carbon dioxide in the atmosphere.

Can energy be transferred from animal to animal

The more stomata the more water loss?

Why does it take a long time to develop a new variety of tomato? A. Changes in traits happen gradually, over many generations. B. Many plants resist change. C. Tomatoes cannot acquire new traits. D. A species cannot change over time.

Select the one true statement. Vacuoles store nutrients, water, and waste in animal cells. Plant cells can have chloroplasts but do not have a cell wall.

Using water more effectively A. Protects the environment B. Causes the loss of natural pollution filters C. Increases with contamination D. All of the above