Complex traits are often called _____ because they _____
A. qualitative; come in one of several discrete
(distinct) forms.
B. external; are influenced by the
environment as well as by genes.
C. quantitative; are described by
measurements.
D. epistatic; are influenced by many genes.
E. environmental; are influenced by the
environment as well as by genes.
C
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Assuming the gardener continues to spray the herbicide for five years, do you think the weed
population will evolve?
a. Yes, there will be more individuals in the population with the herbicide-resistant allele. b. No, there will be no change in the genetic composition of the population. c. Yes, the population will have evolved because speciation will have occurred. d. No, evolution cannot occur over such a short time period.
A normally harmless substance that produces an immune response in some people is a(n):
a. pathogen b. cytokine c. histamine d. allergen e. antibody
In a sexual life cycle, a zygote grows to an adult by
A. mitosis. B. All of the answer choices are correct. C. fertilization. D. meiosis and fertilization. E. meiosis.
What is typically the first step in the scientific method?
A) Experiment B) Hypothesis C) Prediction D) Observation