Which of these types of islands is predicted to have the lowest number of species?
A. A large island near mainland
B. A large island far from mainland
C. A small island far from mainland
D. The island closest to mainland regardless of size
E. A small island near mainland
Answer: C
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Which is true of competitive inhibition?
A. It involves an allosteric enzyme. B. Substrate and inhibitor both bind to the active site. C.A sulfa antibiotic is a competitive inhibitor. D. Mercury is a competitive inhibitor. E. Substrate and inhibitor both bind to the active site AND a sulfa antibiotic is a competitive inhibitor.
Skin color in humans is an example of an evolutionary trade-off: a situation where a trait that is an advantage in one context is a disadvantage in a different context. Darker skin protects DNA from damage due to ultraviolet radiation (an advantage) but makes it harder for the body to produce vitamin D (a disadvantage). Based on what you’ve learned, which of the following describe other examples of evolutionary trade-offs? Select all that apply.
A) Genetic variations that protect people from malaria also cause the blood diseases thalassemia B) Some garter snakes have mutations that make them resistant to a toxin in their prey however snakes with this mutation move more slowly and are not as good at hunting prey C) The alleles that caused a loss of body hair allowed humans to keep cool in hot environments. This in turn helped humans walk and run long distances to hunt large animals D) The common Mormon butterfly is not toxic to birds and other predators. Some common Mormons have genetic variations that make them resemble toxic butterflies, which deters predators. in places without predators, common Mormons with these variations don't live as long as other common Mormons.
Which fermentation product is important for making bread rise?
A) ethanol B) CO2 C) lactic acid D) hydrogen gas
DNA and RNA contain functional units known as:
A. nucleotides. B. amino acids. C. fatty acids. D. enzymes. E. peptides.