When two different forms of a virus infect the same cell, the host cell may manufacture viral particles from both viruses to reassemble them into a new form of virus. This process is called ________.
A. antigenic shift
B. artificial selection
C. antigenic drift
D. the founder effect
Answer: A
You might also like to view...
True or false: All changes in gene sequence are mutations, but not all mutations decrease or increase in frequency over time
A. true B. false
The chromatids detach from one another and become visibly separated chromosomes during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
A middle-aged female patient complains of changes to her face. Her cheekbones and eyebrows have become more prominent, and her jaw is growing. You suspect acromegaly, a disorder caused by excessive growth hormone. She had no growth abnormalities in her youth. What do you suspect is the most likely cause of her problem?
A. a tumour of the pineal gland B. congenital mutation of the GH regulatory region C. a tumour of the anterior pituitary D. a tumour of the posterior pituitary E. menopause Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about growth hormone? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Cardiac glycosides, molecules causing a drastic effect on vertebrate heart function, are produced as defensive chemicals by plants belonging to
A. the mustard family. B. the bean family. C. the grass family. D. the milkweed and dogbane families. E. the poison ivy, oak, and sumac families.