What is the function of a crop as found in an
earthworm and other animals?
a. grinds food
b. absorbs nutrients
c. exit for waste
d. stores food
e. entrance for food
D
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One method plants use to obtain phosphorus when it is in limited supply is:
A. by roots adhering to soil particles B. by roots growing deeper in the ground C. by roots associating with certain fungi D. by roots using passive uptake methods E. by roots binding the phosphorus
In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue pigment synthesis is inhibited by a dominant allele of gene D. In other words, plants with the genotype K- D- will not produce pigment (and their flowers will be white) because of the presence of the D allele. What type of gene interaction determines flower color in primroses?
A) one gene with two completely dominant alleles B) two-genes with recessive epistasis C) two redundant genes D) two genes with dominant epistasis
Adaptive immunity is sometimes also called acquired immunity. Which of the following statements provides a basis for the alternative name?
A) Lymphocytes of the adaptive immune system are highly specific for a single epitope. B) Activated lymphocytes produce daughter cells that are identical in specificity and function. C) To become activated, lymphocytes require exposure to the epitope for which they are specific. D) Activated lymphocytes may persist for years in the body. E) Lymphocytes reactive to normal body components are removed.
How many "turns" are present in crambin?
a. 1 b. 2 c. 3 d. 4