In which situation has the independent variable for the experiment been changed? Check all that apply.

changed from counting the number of duckweed at day 0 and day 14 to counting them every day

changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks

changed from testing the effect of pH on duckweed growth to testing the effect of light levels on duckweed growth

changed from testing the effect of acid pH on duckweed growth to testing the effect of basic pH on duckweed growth

3. changed from testing the effect of pH on duckweed growth to testing the effect of light levels on duckweed growth

4. changed from testing the effect of acid pH on duckweed growth to testing the effect of basic pH on duckweed growth

Explanation:

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igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.