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garri49 [273]
3 years ago
7

A scientist wishes to determine the effect of a digestive enzyme on starch digestion (starch is broken down into glucose). The e

xperimental setup is to mix the enzyme with starch in a test tube, stop the reaction after a known period of time, and then measure the amount of glucose produced.
Which of the following is the correct experimental control?
Biology
1 answer:
Sladkaya [172]3 years ago
4 0

Answer:

An identical setup but replacing the enzyme with an equal volume of water

Explanation:

When carrying out any experiment, it is important to set out a control in order to increase the reliability of the data and results.

The control minimizes the effects of variables other than the independent variable.

In the above experiment, starch has to be eliminated and replaced with water. Water does not have starch hence the digestive enzyme being tested will not have any effects making the data and results from the experimental group reliable.

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Under which circumstances should we try to control the population numbers of Pfiesteria?
zvonat [6]

Answer:

Pfiesteria species generally found in estuaries, the population of which are needed to be controlled only when they becomes toxic. Presence of large of fish triggers toxicity in Pfiesteria.

Explanation:

Pfiesteria are known to be associated with fish kills as for example large fish kill in the seas of North Carolina. It also causes blooming of algae in enormous numbers thus make the water bodies, hostile for survival of fishes and other marine lives. It affects human too by release of toxins in air and water often resulting in respiratory problems, infections of gastrointestinal system, headaches and fatigue. In this type of grave circumstances, leading to outburst of population of Pfiesteria, there is an urgent need to control.

8 0
3 years ago
Given that our model finch population is capable of rapid evolution in response to a changing environment, explain why you think
SIZIF [17.4K]

Darwin's finches are a traditional illustration of an adaptive radiation. Their ancestor came on the Galapagos Island about two million years ago. With time Darwin's finches have developed into fifteen different species separated on the basis of beak shape, body size, and feeding and song behavior.  

The population of finches possesses the tendency of evolving rapidly in response to a changing environment. However, they can also get extinct in condition if the weather fluctuates too briskly between the dry and wet seasons. This would most likely take place due to the immigration of genes and mutations within the genes that are conducted on to the next generations.  


7 0
3 years ago
One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of _____.
Mamont248 [21]

One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of birds. The correct answer is birds

7 0
3 years ago
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PLEASE HELP ME I WILL MARK BRAINLIEST AND O NEED AN EXPLANATION TOO PLS
ziro4ka [17]

Answer:

Decrease in carbon dioxide because they take in carbon dioxide for photosyenthesis process

Explanation:

8 0
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PLEASE HELP DUE VERY SOOONNNN PLEASEEE HELPPP
FrozenT [24]

Answer:

how can I help u with.

I can't see any pictures

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I can answer u

7 0
3 years ago
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