B & D it describes a realistic cause effect relationship between solar weather and earths magnetosphere
Amount of carbon dioxide
Explanation:
The dependent variable in this experiment is the amount of carbon dioxide CO₂ produced by yeast during the experiment.
- The independent variable is the cause in an experiment. It is the variable that causes the change we are measuring. In this experiment, the yeast is the independent variable. The yeast is producing the carbon dioxide.
- The dependent variable is the effect in the experiment. It the variable changing in an experiment.
- The amount of carbon dioxide production is the dependent variable in this experiment.
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D. A keystone species existence keeps an ecosystem in balance.
<span>The lac operon has three genes that encode for proteins that break down lactose into galactose and glucose. When there is no lactose around, it wouldn't make sense for the prokaryote to make these proteins as it would be a waste of energy. So, when there is no lasctose around, the lac repressor binds the operator region of the operon, which inhibits RNA polymerase's ability to bind and start gene expression. However, when lactose is available, it binds to the lac repressor and deactivates it via allosteric inhibition. Once the lac repressor is gone, the genes can be transcribed into mRNA which can be translated into proteins which can go and break down the lactose. </span>
Water resources are sources of water that are potentially useful. Uses of water include agricultural, industrial, household, recreational and environmental activities. The majority of human uses require fresh water.
