what is the average duration of sleep for teens? what is needed?
What will be an ideal response?
7.5/9.25
You might also like to view...
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 natural habitat of a pathogen is referred to as its
A. home. B. primary inhabitance. C. infectious site. D. reservoir.
Which of the following statements best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders?
A) Lethal disorders caused by dominant alleles are usually more severe than lethal disorders caused by recessive alleles. B) Unlike lethal disorders caused by recessive alleles, lethal disorders caused by dominant alleles usually cause the death of the embryo. C) Most individuals carrying a lethal dominant allele have the disorder and die before they reproduce, whereas individuals carrying a lethal recessive allele are more likely to be healthy and reproduce. D) The presence of a lethal dominant allele causes sterility.
The ability of a lens to gather light is referred to as its
A. resolution. B. numerical aperture. C. refraction. D. contrast. E. magnification.