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Bingel [31]
3 years ago
13

Which element is capable of forming long chains by forming single, double, or triple bonds with itself?

Biology
1 answer:
Mnenie [13.5K]3 years ago
3 0
The element carbon makes long chains forming, single, double or triple bonds with itself.
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If CPR is not performed, how many minutes will elapse before the brain becomes damaged from lack of oxygen?
attashe74 [19]
If CPR is not performed, C. 4 minutes will elapse before the brain becomes damaged from lack of oxygen.
One minute isn't enough time - you can even hold your breath for one minute without fainting. Some people can even do it for 2 minutes.
Ten minutes is too long - you would be long dead. 
6 0
3 years ago
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As temperature increases the rate of enzyme activity increases until it reaches approximately 37 degrees Celsius. As temperature
UNO [17]

Answer: Option A

<u>Explanation:</u>

As temperature increases the rate of enzyme activity increases until it reaches approximately 37 degrees Celsius. As temperature increases beyond 37 degrees Celsius, the enzyme activity decreases. The activity decreases because the enzyme denatures.

Any enzyme has certain temperature, pH and pressure to maintain its activity. Only at the ideal or ambient parameters the enzyme works. Most of the enzymes that are present in the human body gets activated by 37 degrees and gets denatured beyond that temperature.

4 0
3 years ago
Which of the following statements about extinction is true? Choose one: A. Recent species are disappearing so slowly that resear
JulsSmile [24]

Answer:

C. At least five mass-extinction events have occurred during the last 500 million years.

Explanation:

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  • A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
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What is The dichotomous key
gayaneshka [121]

Answer:

A dichotomous key is an important scientific tool, used to identify different organisms, based the organism’s observable traits. Dichotomous keys consist of a series of statements with two choices in each step that will lead users to the correct identification.

Explanation:

Your welcome! :)

7 0
2 years ago
A swimmer sprints a short distance for a competition. The swimmer is not able to take in enough oxygen to make the ATP needed fo
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When the swimmer is unable to take in enough oxygen for the sprint, the ATP (Adenosine triphosphate) will be compromised. In such conditions, the body will use anaerobic respiration to produce the ATP. Anaerobic respiration takes place in the absence of oxygen. It used the electron acceptors in place of the oxygen in the respiratory cycle. The amount of the ATP produced is, however, less in anaerobic respiration.

Hence, the answer is 'Option C - Anaerobic respiration would be used to produce small amounts of ATP in the absence of oxygen'.

3 0
3 years ago
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