Which of the following bacteria is known to cause the formation of peptic ulcers?
a. Helicobacter pylori
b. Staphylococcus aureus
c. Streptococcus pyogenes
d. Escherichia coli
e. Micrococcus luteus
A
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Which statement does not represent one of Darwin's observations?
a. All individuals have an equal chance to survive and reproduce. b. Changes in populations are gradual and take place over long periods of time. c. Members of the same species may exhibit considerable variation. d. Some characteristics are heritable and passed on to offspring. e. Some characteristics afford their possessor a better chance of survival.
The rungs of the DNA ladder are formed by base pairs
a. joined by covalent bonds. b. joined by hydrogen bonds. c. joined by ionic bonds. d. NOT joined to each other
In MATERNAL EFFECT, which of the following is TRUE?
A) In a reciprocal cross, the offspring's genotype and phenotype are the same as the mother's. B) The mother's phenotype is the offspring's phenotype. C) The mother's genotype is the offspring's phenotype. D) In a reciprocal cross, only the father's alleles are expressed. E) In a reciprocal cross, the grandfather's alleles have the most influence.
Your biology professor takes the class on a field trip to a local lake. You spend an hour studying the lake and writing down all observations. You hypothesize that the lake is oligotrophic. Which observations would support this hypothesis? (Check all that apply.)A) The shoreline is mostly rock and sand with very little vegetative matter.B) The lake has extensive aquatic plant beds.C) The lake has little planktonic growth.D) The bottom of the lake is easily visible.E) An oxygen probe reveals low oxygen content in the water.
What will be an ideal response?