In the Linnaean system of classification, related families are grouped into the next most inclusive taxon, which is called a(n) __________.
a. class
b. phylum
c. genus
d. order
e. kingdom
Answer: d. order
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Is the lac operon transcribed when lactose is present?
a. Yes, lactose binds to the repressor, allowing RNA polymerase to bind to the promoter and transcribe the operon. b. Yes, lactose binds to RNA polymerase, allowing it to bind to the promoter and transcribe the operon.
c. No, lactose binds to the repressor, allowing it to bind to the two operators preventing transcription. d. No, lactose has no effect on transcription of the lac operon. e. No, lactose binds to the second operator, blocking transcription by RNA polymerase.
Animals with chemical defenses are also typically:a
fast runners. b. aposematic. c. small in size. d. large in size. e. camouflaged.
A tumor that is classified as malignant is described as:
A. a disorganized mass that is not encapsulated and can invade nearby organs. B. a slow-growing, organized mass of encapsulated cells. C. usually confined to the skin. D. an area of swelling that shows no abnormal growth of cells.
Answer the following questions true (T) or false (F)
1. Any allergen can cause an anaphylactic response, but usually this dangerous scenario is caused by injected or ingested allergens such as foods, drugs, and insect venoms. 2. If the patient has an allergy to the tested allergen, then the skin develops a lesion consisting of a flattened reddened area called the wheal and a raised, inflamed area called the flare. 3. The blood type AB+ is referred to as the universal donor.