Organisms demonstrated by the technique shown in Image A belong to the group known as:
a) Spirochetes
b) Bacilli
c) Mycobacteria
d) Fungi
Answer: c) Mycobacteria
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Biomagnification is a significant problem in aquatic communities. Levels of chemicals magnify (increase or accumulate) at each new link in a food chain. Use the following information to estimate the level of chemical X in a large-mouth bass. One alga can accumulate 1 unit of chemical X. Eachcopepod eats 15 algae. A minnow consumes 10 copepods, each large-mouth bass consumes 20 minnows.
A. 15 units B. 20 units C. 30 units D. 150 units E. 300 units F. 3,000 units G. 20,000 units Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about biomagnification? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The enzyme phosphofructokinase-1 (PFK-1) is thought of as a metabolic "valve" that regulates the rate of glycolysis. Which of the following correctly identifies its allosteric activators and inhibitors and their actions?
A. ADPâ€"activator; ATPâ€"activator B. AMPâ€"activator; CoQâ€"inhibitor C. ATPâ€"activator; AMPâ€"inhibitor D. ADPâ€"activator; citrateâ€"inhibitor E. CoQâ€"activator; citrateâ€"inhibitor
A gene locus is
a. a recessive gene. b. an unmatched allele. c. a sex chromosome. d. the location of a gene on a chromosome. e. a dominant gene.
Glacier ice occupied about __________% of Earth's land during the last Ice Age, then began retreating
about 17,000 years ago. Today, glacier ice occupies about __________% of the land surface. a. 30; 10. b. 50; 10 c. 73; 50 d. 80; 50 e. 15; 1