Which of the following would pertain to a bad antibiotic?
A) no contraindications
B) no drug interactions
C) narrow therapeutic index
D) low toxicity
E) long half-life
Answer: C
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What would be the frequency of pink flowers in a population where the allele frequency of CR is 0.4 and the population is in Hardy-Weinberg equilibrium? Assume that CR CR is red, CRCW is pink, and CwCw is white.
A. 0.04 or 4% B. 0.16 or 16% C. 0.2 or 20% D. 0.8 or 80% E. 0.48 or 48%
Which animal has the least advanced nerve cord?
a. chordate b. arthropod c. flatworm d. human e. octopus
Which of the following can cause evolutionary change in a small population?
A) Homozygous individuals B) Lack of mutations C) Genetic drift D) Lack of gene flow E) All recessive alleles
Which of the following is the best explanation for the presence of both chloroplasts and mitochondria in plant cells?
a, in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants cannot produce enough ATP in the process of photosynthese to meet their energy needs, they can produce it in aerobic respiration c. sugars are produced in chloroplasts. these sugars can be stored in the plant for later use, converted to other chemicals, or broken down in aerobic respiration to yield ATP for the plant to use to meet its energy needs d. the leaves and sometimes the stems of plants contain chloroplasts which produce APT to meet the energy needs of these plant parts. The roots of plants contain mitochondria which produce ATP to meet the energy of these plant parts.