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vovikov84 [41]
4 years ago
8

A researcher is designing a laboratory experiment to determine whether the inorganic substance A affects the rate of a reaction

between two colored liquids, X and Y. When the reaction is complete, the liquid is clear. The reaction between X and Y is similar to one used by manufacturers to produce certain chemicals in factories. Which method would best answer his question about reaction rate and what will he find out about substance A?
First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is a catalyst.

First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst.

First, he should measure the final temperature of the liquid when X and Y react without substance A. Then, he should measure the final temperature when he adds substance A to X and Y. He will find out if substance A is an enzyme.

First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is an enzyme.
Biology
2 answers:
antoniya [11.8K]4 years ago
8 0
The answer would be First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is an enzyme.
nlexa [21]4 years ago
3 0
The corrrect option is D.
Since the scientist was trying to determine if substance A affect the rate of reaction of X and Y, the best thing to do is to make substance X and Y to react together first, he should then measure the time taken for the reaction to take place. Next, he should make X and Y to react together again, but this time in the presence of A. The time taken for the reaction to occur should be measures. The scientist can now compared the two time measurements and decide if there are difference between them or not. 
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30 POINTS
Sergeeva-Olga [200]

Answer:

The correct choice is A)

There will be fewer producers in the area.

Explanation:

Very easy to deduce. A producer in biology of ecosystems is an organism that produces its own food. Another word for a producer in biology is 'autotroph'.

They produce energy directly from the energy given off by the sun or chemicals or both.

Grass (or plants) are producers. They do this with the help of water, converting solar energy into sugar or food, which are usable forms of energy.

So the more grass is consumed, the fewer producers in the area.

Cheers!

5 0
3 years ago
Read 2 more answers
What will most likely happen if a person does not consume the minimum daily requirement of carbohydrates
Mice21 [21]

  If a person does not consume the minimal daily requirement of carbohydrates than the body will start to use the fat and proteins in the body so that it can produce energy. The carbohydrates are the primary energy source in the body, so the lack of them makes the body low on energy, and also it makes it harder to think and to remain active. If this process continues for a prolonged period of time, than it causes the building up of ketones in the blood, which results in ketosis.

5 0
3 years ago
Other factors being equal, which sensory stimulus is least likely to lead to sensory adaptation?
valentina_108 [34]
The correct answer is: the wail of a loud car alarm. 
Sensory adaptation is a term that refers to the changes that stimuli can trigger on the sensory receptors. The process involves changes in the receptors' sensitivity and it is believed that all of the senses exhibit this adaptation. In particular, the sense of touch can quickly adapt to hot and cold stimulation, but not when the stimulus is extremely intense (such as too hot or too cold). Also, our olfactory sense presents the characteristic of odour fatigue. A prolonged exposure to a specific smell leads to a temporary inability to sense this smell and this is a type of sensory adaptation. Finally,
our hearing undergoes a sensory adaptation as well, but not when it comes to sudden, unexpected and instantaneous loud noises. That is why the wail of a loud car alarm will be the least likely to cause sensory adaptation.
3 0
3 years ago
The enzyme and substrate will fit together like a ____ and ____.
krek1111 [17]
For the first blank it would be:  Lock 

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For the second blank it would be: Key
7 0
4 years ago
Write a list of three interesting scientific questions. Is each one testable?
Mrac [35]
Hi lovely! Here are your scientific questions that are testable: 

Does the type of liquid affect how fast an ice cube melts? 

Does changing the temperature of water affect the buoyancy of an egg?

Does the thickness of the wire affect the power of the circuit?


Hope I helped!
7 0
3 years ago
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