You are out working in your garden, and you notice that one of your favorite flowering plants has black, dead spots on the leaves. You immediately suspect that the plant has been invaded by a pathogen and has initiated a(n) _____
A) avirulence response
B) hypersensitive response
C) resistance response
D) virulence response
B
You might also like to view...
The bile salts _____
A) are enzymes B) are manufactured by the pancreas C) emulsify fats in the duodenum D) increase the efficiency of pepsin action E) are normally an ingredient of gastric juice
If DNA repair mechanisms were perfect, which of the following would most likely result?
A. We would live forever. B. Evolution as we know it would stop because mutations are the only agent that gives us new genetic variation. C. The rate of evolutionary change would dramatically increase. D. Humans would stop aging, as aging is a collection of DNA mutations. E. All of the answer options are correct.
Molecular analysis of lactase DNA __________ in humans shows that genes for that enzyme have __________ evolved in Africa and Europe to produce the same result.
Fill in the blank(s) with the appropriate word(s).
________ are mammals that lay eggs.
a) Monotremes b) Marsupials c) Eutherians d) No mammals lay eggs!!