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scZoUnD [109]
3 years ago
15

An experiment was performed to determine the health effects of different amounts of second-hand smoke on one-year-old hamsters.

What is the Independent Variable of the experiment?
Biology
1 answer:
galina1969 [7]3 years ago
7 0

Answer:

Independent variable: different amounts of second-hand smoke

Explanation:

The independent variable in an experiment is the variable that the experimenter changes or manipulates in order to bring about a measurable response.

In this question, a test is being carried out to determine the health effects of different amounts of second-hand smoke on one-year-old hamsters. Based on this, the independent/manipulated variable is the DIFFERENT AMOUNTS OF SECOND-HAND SMOKE because it is the variable being changed.

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In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopar
Tems11 [23]

Answer:

The caterpillars gain energy directly from the orchids

Explanation:

Earth maintains the flow of nutrients in the form of cycles and linear sequence in which the nutrients in the form of matter and energy flows from one organism to another and one sphere to another sphere.

One such flow of nutrients in the form of matter and energy can be observed in the organisms when one organism feed upon another and gain energy. This flow of matter and energy is called a food chain.  

The energy flows in this food chain through ten percent rule which states that only ten percent of energy can be transferred to next trophic level, therefore, the organism at the lowest level will have the highest amount of energy.

In the given question, the caterpillars can be considered as primary consumers which gain energy from the orchid plants directly and thus is the most appropriate answer.

7 0
3 years ago
Imagine there was a campaign to wipe out all bacteria. Why would this not be a good
Sladkaya [172]

Answer:

If all the bacteria are removed from the earth, all the organisms are negatively affected.

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6 0
3 years ago
Which population of frogs is likely to have more changes after many generations?
Shalnov [3]

Answer:

both are equally likely to have changes in their structure

4 0
3 years ago
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Question 18
cupoosta [38]

Answer:

Insulated container

Explanation:

The insulated container, keeps aislated  what it holds. It´s purpose is to preserve, and avoid in some cases temperature change. This type of containers also are helpful when you need to transport or storage sensitive materials.

3 0
3 years ago
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Which of the following statements about green algae is true?
frez [133]

I think it's (c). Evidence suggests they were the first plants

Explanation

Evidence shows that plants evolved from freshwater green algae, a protist

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but land plant are multicellular and autotrophic

5 0
2 years ago
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