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viva [34]
3 years ago
9

How long can humans hold their breath underwater?

Biology
1 answer:
Rashid [163]3 years ago
4 0
That would depend on the person and there health but the average is 3.5 minutes
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2. How do cells transform energy from food in the absence of oxygen?
ipn [44]
I think it’s Anaerobic respiration
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3 years ago
Describe some of the modifications that polypeptide chains undergo before becoming functional proteins
umka2103 [35]
Polypeptide chains undergo some modifications before they become fully functional. Some of these modifications include: proteolytic cleavage, lipidation and glycosylation. Proteolytic cleavage refers to the removal of some amino acids from a polypeptide chain by proteases in order for the protein to become active. An example of a substance that is modified through this process is insulin.
4 0
3 years ago
A student added a solution to the plant cell shown in image 1 which resulted in the plant cell undergoing changes, as shown in i
Ymorist [56]

Answer:

Plasmolysis

Explanation:

In the image 1 the cell is having sufficient quantity of water leading to a turgid cell.

The image 1 plant cell is in a dilute solution in which water enters into cell from external medium.

The image 2 plant cell is exposed to a solution which is high concentrated solution.

Due to this high concentrated  solution the water present in  the cell is send out by exosmosis.

Due to loss of water from plant cells the protoplasm in plant cell shrinks in which cell membrane gets separated from  cell wall.

This shrinkage of protoplasm by loss of water is called plasmolysis.

3 0
4 years ago
Read 2 more answers
The genes for a brain are found all the way down the vertebrate family tree in a small worm-like animal called amphicoelus. True
Deffense [45]

Answer:

Its false  

Amphicoelias altus (from the gr. "Hollow character on both high sides") is the only known species of the extinct genus. Titoniense, in what is now North America. Amphicoelias is present in stratigraphic zone 6 of the Morrison Formation

It was also similar in size to Diplodocus, about 25 meters long. Although most scientists have used this data to distinguish Amphicoelias and Diplodocus as separate genera, at least one has suggested that Amphicoelias is probably the largest synonym for Diplodocus.3 Amphicoelias altus, was named by paleontologist Edward Drinker Cope in December of 1877, although it was not published until 1878, for an incomplete skeleton consisting of two vertebrae, a pubis, the hip, and a femur, bone of the upper leg.4 Cope also named a second species, A. fragillimus

5 0
3 years ago
Which part of the digestive system is responsible for absorption of nutrients? *
sertanlavr [38]

Answer:

A

Explanation:

5 0
3 years ago
Read 2 more answers
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