• 2022-06-04 问题

    Mercury is a metal pollutant that can disrupt the ecosystem. Why is mercury so disruptive to the ecosystem? A: Organisms excrete the mercury out as waste. B: Organisms use mercury as an enzyme to speed up reactions in an organism's body. C: Mercury slows down the respiration rates of primary consumers. D: Mercury can become concentrated in the tissues of organisms.

    Mercury is a metal pollutant that can disrupt the ecosystem. Why is mercury so disruptive to the ecosystem? A: Organisms excrete the mercury out as waste. B: Organisms use mercury as an enzyme to speed up reactions in an organism's body. C: Mercury slows down the respiration rates of primary consumers. D: Mercury can become concentrated in the tissues of organisms.

  • 2021-04-14 问题

    Living organisms contain more water _________ substance.

    Living organisms contain more water _________ substance.

  • 2022-06-10 问题

    Evolution can be defined as _____ change that takes place in a(n) _____. A: any; individual B: a genetic; individual C: any; group of organisms D: a genetic; group of organisms

    Evolution can be defined as _____ change that takes place in a(n) _____. A: any; individual B: a genetic; individual C: any; group of organisms D: a genetic; group of organisms

  • 2022-06-03 问题

    What is Chargaff’s ratio? () A: In any organisms, amount of Adenine is the same as Thymine, amount of Cytosine is the same as Guanine. B: In any organisms, amount of Adenine is the same as Cytosine, amount of Thymine is the same as Guanine. C: In any organisms, amount of Adenine is the same as Guanine, amount of Thymine is the same as Cytosine.

    What is Chargaff’s ratio? () A: In any organisms, amount of Adenine is the same as Thymine, amount of Cytosine is the same as Guanine. B: In any organisms, amount of Adenine is the same as Cytosine, amount of Thymine is the same as Guanine. C: In any organisms, amount of Adenine is the same as Guanine, amount of Thymine is the same as Cytosine.

  • 2022-06-14 问题

    Organic evolution includes the concept that ( ). A: humans evolved from gorillas. B: everything evolved from amoebas C: organisms haven D: today E: organisms change over time

    Organic evolution includes the concept that ( ). A: humans evolved from gorillas. B: everything evolved from amoebas C: organisms haven D: today E: organisms change over time

  • 2022-06-10 问题

    Evolution can be defined as _____ change that takes place in a(n) _____. A: any; individual B: a genetic; individual C: any; group of organisms D: a genetic; group of organisms E: All of the answers are correct.

    Evolution can be defined as _____ change that takes place in a(n) _____. A: any; individual B: a genetic; individual C: any; group of organisms D: a genetic; group of organisms E: All of the answers are correct.

  • 2022-06-07 问题

    Scientists have proposed many different evolutionary trees over the years. Evolutionary trees are useful to A: determine that all heterotrophic organisms belong to the kindgom Fungi. B: determine that all phototrophic organisms have derived from kingdom Plantae. C: analyze the type of speciation that occurred between 2 populations. D: evaluate which organisms are closely related.

    Scientists have proposed many different evolutionary trees over the years. Evolutionary trees are useful to A: determine that all heterotrophic organisms belong to the kindgom Fungi. B: determine that all phototrophic organisms have derived from kingdom Plantae. C: analyze the type of speciation that occurred between 2 populations. D: evaluate which organisms are closely related.

  • 2022-05-26 问题

    Theword“they”underlinedinParagraph1refersto______. A: organisms B: fish C: toxins D: flesh

    Theword“they”underlinedinParagraph1refersto______. A: organisms B: fish C: toxins D: flesh

  • 2021-04-14 问题

    The structures of many proteins—and their constituent domains—are so stable and effective that they have been conserved throughout evolution among many diverse organisms.

    The structures of many proteins—and their constituent domains—are so stable and effective that they have been conserved throughout evolution among many diverse organisms.

  • 2021-04-14 问题

    Nitrogen and oxygen are ___ important ___ most living organisms cannot survive without these elements.

    Nitrogen and oxygen are ___ important ___ most living organisms cannot survive without these elements.

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