Exposure to chromium and ether is linked to ____
a. leukemia
b. lung cancer
c. bladder cancer
d. skin cancer
e. liver cancer
ANSWER: b
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In western Sweden, coastal marine ecosystems have been exposed to discharge of nutrients over several decades. As a result, algal blooms are more common.Algal mats on the sea bottom limit sunlight and alter the amount of dissolved oxygen in the water. Additionally, some algae produce toxic compounds that can enter shellfish. Furthermore, the decomposing algae produces a strong odor. Which statements below correctly match the outcomes to their effects on value of the ecosystem? Check all that apply.
_____ Aesthetic value is lost because the algae makes the beach ugly and smells terrible. _____ Indirect economic value is lost because fisherman cannot catch their usual fish. _____ Direct economic value is lost because the toxic shellfish cannot be eaten. _____ Aesthetic value is gained because the algae could be used for biomass. _____ Direct economic value is lost because the properties near the beach aren’t as desirable. Additional: 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 the economic value of ecosystems? 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 leading and the lagging strands differ in that _____
A) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction B) the leading strand is synthesized by adding nucleotides to the end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the end C) the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together D) the leading strand is synthesized at twice the rate of the lagging strand
Which of the following statements about DNA replication is false?
A. The two strands are separated. B. Each existing strand is used as a template for making a new strand. C. Synthesis of both new strands is in the 5' to 3' direction. D. The newly synthesized DNA is packaged into one nucleus, and the original DNA is packaged into another nucleus.
Which autosomal dominant condition results in defective connective tissue production affecting blood vessels like the
aorta? a. cystic fibrosis
b. PKU c. Tay-Sachs disease d. Marfan syndrome e. achondroplasia