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lys-0071 [83]
3 years ago
7

How do enzymes speed up chemical reactions? Enzymes A) lower the activation energy of chemical reactions. B) raise the temperatu

re of the cell, speeding chemical reactions. C) store ATP, allowing more energy to be used in chemical reactions. D) act as miniature 'transfer trucks', gathering materials for chemical reactions, and placing them together.
Biology
2 answers:
-BARSIC- [3]3 years ago
6 0

The right answer is A) lower the activation energy of chemical reactions.

The enzyme accelerates the reaction without changing the steady state.

Enzymes lower the activation energy of the substrate.

Activation energy or free activation energy is the energy that must be absorbed by the reagents to break their bonds.

The reagents must reach an unstable transition state in which the bonds are more fragile and easier to break.

Even an exergonic reaction requires the absorption of energy to reach the transition state.

Kitty [74]3 years ago
6 0

Answer:

the answer is A hope this helps

Explanation:

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Lead emissions since the early 1980s have
frez [133]
Lead emission since early 1980s have DECREASE DUE TO LEAD FREE GASOLINE. 
Lead is a natural occurring element that is found in small quantity in rocks and soils. Lead emission is an important environmental health issue because a very small quantity of lead can cause adverse effects on the nervous system of unborn babies and young children. Because of this, the government took all necessary measures to ensure that its emission was drastically reduced.
4 0
3 years ago
To survive, an organism must be able to maintain stable internal conditions in a changing environment. This process is called ho
Reptile [31]

Answer:

1. Initial air temperature: 0 °C (32 °F)

2. Initial body temperature: 37 °C (99 °F)

3. The expected effect of different factors on body temperature are:

   A. Raising air temperature: Increase

   B. Lowering air temperature: Decrease

   C. Adding clothing: Increase

   D. Exercising: Increase

Explanation:

The question is incomplete, it is necessary to look for a software related to this homework.

<u>Homeostasis is a property of organisms that consists in their capacity to maintain a stable internal condition by compensating for changes in their environment</u> through the regulated exchange of matter and energy with the exterior. It is a a dynamic equilibrium controlled by a mechanism of feedback that constitute the self-regulating mechanisms. Examples of homeostasis are temperature regulation and the balance between acidity and alkalinity (pH)

The Human Homeostasis Gizmo™ is a software that allows you to explore  how the human body stays at a nearly constant  temperature in different conditions.  To use it, you have to set the air temperature at 0 °C (32 °F) and the body temperature at 37 °C (99 °F), and click Play. After a simulation of 1 hour, then click Pause and gather the information. Then, do the same cprocedure  to test the effect of other factors and Click Reset between each trial. To determine the effect of different factors on body temperature, you have to compare the  final body temperature to the final body temperature while  there is no specific movement or change.

Then:

1. Initial air temperature: 0 °C (32 °F)

2. Initial body temperature: 37 °C (99 °F)

3. The expected effect of different factors on body temperature are:

   A. Raising air temperature: Increase

   B. Lowering air temperature: Decrease

   C. Adding clothing: Increase

   D. Exercising: Increase

This is for a logical reason, anything you do to heat it or generate heat, will increase the temperature. And anything you do to generate cold, will lower the temperature.

The effect of different factors on body temperature according to Gizmo:

   A. Raising air temperature: Increase

   B. Lowering air temperature: Decrease

   C. Click Add to a sweatshirt, hat, pants, and  parka. Then, adding clothing:

   Maintained

   D. Set the Exercise level to 70%, then exercising: Increase

When the temperature increases, it is because you are able to record the results from the software and you see temperature goes from 99 °F to 100 °F. When the temperature decreases. it is because it goes from 99 °F to 97 °F. When it is maintained, there is no change.  

5 0
2 years ago
The Grand Coulee dam and hydroelectric plant are located on the Columbia River in Washington state.
marin [14]

Answer:

Explanation: Hydropower is the generation of electricity from water through the construction of dams. it is a renewable energy source use over a wide range of environment. Construction of a waters storage project can raise the water level behind a dam from a few feet to several hundred feet by prevention water free flow called Inundation.

It leads to migration of human and other living organism such as fish and salmon. Salmon movement may be disoriented through the slower move of the water this leads to migration.

Fish moving around the dam coming in contact with turbines and the walls of the dam can become stressed, injured or die

vegetation and surrounding water it provide habitat for birds, waterfowl, and small and large mammals when hydroelectric project results in blockage of free-flowing river, the nesting, forage, and cover provided for the organism in these areas is temporarily or permanently lost.

5 0
2 years ago
Select the correct answer.
nika2105 [10]

Answer:

<em>True, </em><em>this is because they are used to keep balance and hold your own body weight, your wrist and hand shouldn't, that is why your arms and legs are for lifting heavy stuff. So that is why your tarsus and foot are stronger.</em>

<em />

5 0
3 years ago
Which of the cell types shown helps determine capillary permeability?
alexira [117]

The correct answer to this is:

“Astrocytes”

Astrocytes also called star cells due to their shape are the most abundant glial cells in the brain. Extensions from these cells encase capillaries and offer extra control over which materials enter or leave the intercellular fluid of the CNS thus acting like a permeability membrane.

6 0
3 years ago
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