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liq [111]
3 years ago
6

LESSON 4.2 Review

Biology
2 answers:
zhannawk [14.2K]3 years ago
5 0
Energy cannot be created nor destroyed. it can only be transferred from one form to another.
Andrews [41]3 years ago
4 0

Answer:

Energy is said to flow in a "one-way stream" through an ecosystem. In your own words, describe what that means. Energy is not recycled. Energy enters an ecosystem and flows through a food chain, but it is not reused, it is lost as heat.

Hope the answer helps:)

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Which curve shows the course of the reaction in the presence of an enzyme--the black curve or the red curve? Which line represen
nikklg [1K]
I found the attached image on the internet and it really helps complete this exercise.

First question:
In the presence of an enzyme, the course of the reaction is shown by the red curve. The necessary energy to make a reaction occur is less when there is an enzyme to help the reaction happen. Enzymes work as catalysts that act over substrates converting them into different molecules in a much accelerated way then it would happen without the enzyme's help, if it would happen at all.

Second question:
The activation energy is represented by line B. The activation energy is the energy needed to be available for a reaction to happen. If we compare it with line A, which represents the activation energy necessary for a reaction without an enzyme, we can see how much less energy is necessary to dispend when an enzyme is part of the reaction. Line C represents the energy resultant from the reaction.

3 0
2 years ago
Explain what is different about how genetic
Olenka [21]

Answer:

The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells have a nucleus.

The nucleus is where cells store their DNA, which is the genetic material.

The nucleus is surrounded by a membrane. ...

Explanation:

All prokaryotes are single-celled (unicellular) organisms.

6 0
2 years ago
Maria predicts that the amount of light in an environment will affect the growth of algae living in that environment. Which of t
Sati [7]

Answer:

Option A is the correct answer. To conduct a controlled experiment would be the best choice for Maria to test her prediction.

Explanation:

A controlled experiment can be described as an test in which one of the test models is kept constant for a variable, while in other experimental models, a change is made for testing the variable.

It would be best for Maria to conduct a controlled experiment. In the control model, Maria should keep light as constant whereas in other experimental models she should increase and decrease the quality of light to test her prediction. She should then compare her experimental results with the control model to deduce the results.

3 0
3 years ago
Read 2 more answers
Which of the processes of the water cycle car by releasing energy?
arsen [322]
Condensation, because when water vapor turns into water again it needs to release energy to do so. Its like turning ice into water again. 

I hope this helped ^_^
3 0
3 years ago
Which structure in the cell shown in Figure 7–2 above stores materials, such as water, salts, proteins, and carbohydrates?
RideAnS [48]

The answer is C. These structures are vacuoles and are found in plants cell (you can tell it’s a plant cell because of the outer cell wall in the picture). Vacuoles have a variety of other functions storage of waste products, maintain turgor pressure  for plants support.

5 0
3 years ago
Read 2 more answers
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