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Phantasy [73]
3 years ago
7

As an overall average, about _____ of the energy at one trophic level is available to the next-highest rank in the food chain.

Biology
1 answer:
Anuta_ua [19.1K]3 years ago
8 0

As an overall average, about 10% of the energy at one trophic level is available to the next-highest rank in the food chain.

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Know the terms refraction, reflection and absorption as they refer to the movement of light waves
IrinaK [193]
Three cases happen when a light wave strikes an object. Light waves can either be: absorbed, reflected or refracted. The differences are as follows:

a. Absorption - light stops at the object causing it to appear dark or opaque.
b. Reflection - this could happen either in a smooth or rough surface. On a smooth surface, for example mirror or glass, light bounces off the surface at angle equal to the incoming light wave. On a rough surface e.g. earth, light bounces at many angles because the surface is uneven.
c. Refraction - light goes through the object and bends at an angle. Typical thing you see when diamond  or water is struck by light. 
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Genetic variation ________. Genetic variation ________. is created by the direct action of natural selection tends to be reduced
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Lerok [7]

Answer:

A or C

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Explain the role of enzymes as biological catalysts that lower the activation energy of a reaction.
tia_tia [17]

Answer:

Enzymes are one kind of protein which functioning as catalyst  that speed up reactions by lowering activation energy.Enzyme accelerate a reaction without altering its chemical equilibrium.

Explanation:

Energy which is required for  start a biochemical reaction is called activation energy.Activation Energy helps to jump and start a thermodynamically favorable reactions.

Enzymes can  many  way to its activation energy.

1. The enzyme may hold the substrates in such a way as to distort the substrate bonds closer to their form in the transition state. This reduces the amount of energy needed to complete the transition.

2.Enzyme create a charge distributor which opposite of transition state his lowers the energy of the transition state and decreases the activation energy.

3.The enzyme may reduce the reaction entropy   by bringing substrates together in the correct orientation to react.

4. The enzyme may provide a completely different chemical pathway for the reaction. It may form new bonds in the ES complex that would be difficult to form without the enzyme.

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Whcih element is the most important?
kirill115 [55]
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