Предмет: Биология, автор: name80041

Исследователи разделили растения пшеницы на две группы и выращивали их в лаборатории в одинаковых условиях, за исключением того, что растения первой группы освещали красным светом, а растения второй группы — зеленым и изменяли интенсивность фотосинтеза. Какая переменная в этом эксперименте будет зависимой (изменяющейся), а какая – независимой (задаваемой). Какую нулевую гипотезу смог сформулировать исследователь перед постановкой эксперимента. Объясните, почему важно освещать растения одинаковое по продолжительности время? Почему результаты могут быть недостоверными, если известно, что не осуществлялся контроль за концентрацией углекислого газа в воздухе?

Ответы

Автор ответа: rezrezd

Зависимая переменная в этом эксперименте - интенсивность фотосинтеза. Независимая переменная - тип света (красный или зеленый).

Нулевая гипотеза в этом эксперименте может быть такой: не будет значимой разницы в интенсивности фотосинтеза при различном типе освещения.

Важно освещать растения одинаковое по продолжительности время, чтобы исключить влияние других факторов на результаты эксперимента. Например, если длительность освещения не будет одинаковой, то растения могут быть наполнены химическими или физическими энергиями, и будет сложно установить конкретное влияние типа освещения.

Результаты могут быть недостоверными, если известно, что не осуществлялся контроль за концентрацией углекислого газа в воздухе, потому что высокая концентрация углекислого газа может влиять на интенсивность фотосинтеза, и если контроль не осуществляется, то этот фактор будет пренебрежен и результаты эксперимента могут быть искажен

Автор ответа: nadirheydarov9

Ответ:

Пшеница является зависимой переменной, так как она зависит от цвета и интенсивности света. А сам свет является независимой переменной, так как он действует на пшеницу изменяя интенсивность фотосинтеза.

Исследователь хотел сформулировать , то что, если освещать эти пшеницы в одинаковое время и в одинаковой продолжительности, то у них процесс фотосинтеза будет протекать одинаково. А если же освещать их в разное время, то одна пшеница будет отличаться от другой на генетическом уровне.

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