The sequence of amino acids in a protein is known as the protein’s ________ structure
a. quaternary
b. secondary
c. tertiary
d. primary
Answer: d
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Most human embryos that are aneuploid
A. result in Down's syndrome. B. result in sterility. C. are spontaneously aborted in the first trimester. D. can develop and survive to adulthood. E. are usually the result of increased nondisjunction in the gametes of older men.
Slow-growing NTM whose colonies produce no pigment, whether they are grown in the dark or the light, are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
Answer the following statements true (T) or false (F)
1. The use of fossil fuels has increased the available resources for populations around the world, contributing to the exponential growth rate of the human population. 2. Developing countries are less likely to agree on a global climate change treaty because they might fear that it will slow their economic growth. 3. Population sizes of predators and their prey in a community are constant over time. 4. Pioneer species make up the climax community of a given ecosystem. 5. The main source of water in streams is replenished from groundwater.
The Lotka-Volterra model of predator-prey interactions assumes a mutual regulation of predator and prey populations
Indicate whether the statement is true or false