Pls help with this project

Biology

1 answer:

marusya05 [52]3 years ago

5 0

Answer:

Jessica melts 200 grams of dark chocolate that contains 60% cocoa and mixes it with 200 grams of milk chocolate that contains 30% cocoa

What is the concentration of cocoa in the resulting mixture

Explanation:

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21. Describe the three steps by which a population of insects becomes resistant to a pesticide.

Tresset [83]

Answer:

1. Survivors of the pesticide have a gene that protects them from it.

2. Then the survivors pass on the gene to their offspring,

3. Each time the pesticide is sprayed, the insects have a greater chance of survival.

6 0

3 years ago

Hunt and her team designed an experiment to test her hypothesis about the effect of BPA on mice. They administered daily doses o

katovenus [111]

Answer and Explanation: The figure below shows the doses of BPA administered to the female mice over time.

An experiment is used to determine cause and effect among variables. When the research is for the impact of a treatment, researchers randomly separate individuals in two groups:

Control Group doesn't receive any treament or a placebo or a treatment whose outcome is already known;
Treatment Group receives the treatment;

For the female mice on the image below, in the First Group is not injected any dosage of BPA, so they are the control group, while the others are treatment group.

The variables in a experiment are classified as independents or dependents:

Independent Variable is the cause;
Dependent Variable is the effect;

For the BPA research, since it is the effect of BPA over time on the mice's cells it is being investigated, dosage of BPA is the independent variable and time is the dependent variable.