I would assume it is choice b.
because in the summer there are more hours of light, and n the winter there are less.
"Water quality" may include the amounts of dissolved oxygen
and the levels of algal growth, pollutants which may be present and the pH level. Water quality effects also which types of organisms can
survive in a body of water.
Shellfish require a high level
of dissolved oxygen and their abundance is an indication of good water quality. Shellfish are sensitive to changes in the ecosystem and they cannot easily escape changes in the water quality. These are one of the reasons why shellfish are good indicators of water quality.
The question is incomplete. The complete question has been attached below.
Answer:
The transition state is the state that has highest activation energy as compared with the reactant or product. Intermediate state is important for the conversion of the reactant into the product. Transition state analogue may be any molecule that has similar feature with the transition state.
The intermediate state has the finite life time greater than the 10⁻¹³s.They can be detected easily as well as stable. Intermediate stages include the enzyme substrate complex or enzyme product complex. Transition state analogue mimic the transition state and can also acts as inhibitor. The transition state shows highest energy and o not have fix life time. The incomplete broken bonds and incomplete formed bonds are present in the transition state.
I may be wrong but I think it’s the second one. They speed up reactions, and there’s a certain enzyme for a certain reaction.
Common pesticide contaminants in foods