In plants, the secondary metabolites are primarily responsible for
a. nutrition.
b. food gathering.
c. overcoming air pollutants.
d. defense.
e. protection against ultraviolet radiation.
D
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Which of the following do methanogens not use to form methane?
A. Formate B. Acetate C. Phosphate D. Carbon dioxide
Deductive reasoning is used to make ________ based on a hypothesis
A) correlations B) data C) predictions D) statistical tests
Which of the following would not be a study of an organism in its natural environment?
a. a copperhead snake in an eastern deciduous forest b. a fruit fly at a picnic c. a child in a park d. a clown fish in an aquarium e. a lion on the African savanna.
Plasmids are used as vectors in plant and bacterial genetic engineering. However, there is a major difference in the fate of genes introduced into bacteria on most bacterial plasmids and into plants on tumor-inducing (Ti) plasmids
What is this difference? A) In bacteria, genes are stably expressed; in plants, gene expression is always lost quickly. B) Gene expression tends to decrease rapidly and unpredictably in bacteria; gene expression is much more stable in plants. C) Bacterial plasmids are circular DNAs; Ti plasmid DNA is linear. D) Bacterial plasmids and the genes they carry usually are not integrated into the chromosome; Ti plasmids and the genes they carry are integrated into the chromosome.