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Strike441 [17]
2 years ago
10

Which examples show repair or replacement of damaged cells? 1. A scrape being healed. 2. Scars forming where a cut once belonged

. 3. Skin flaking off your arm in the winter.
Biology
2 answers:
Archy [21]2 years ago
4 0
2 because it shows signs that the cells are getting replace by new cells
galben [10]2 years ago
3 0
2.Scars forming where a cut once belonged.
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Answer:

Explanation:

Plants use carbon and release oxygen, and animals release carbon and use oxygen.

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2 years ago
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A sodium-potassium pump _____. moves three potassium ions out of a cell and two sodium ions into a cell while producing an atp f
SVETLANKA909090 [29]

Move three sodium ions out of a cell and two potassium ions into a cell while consuming an atp for each cycle

Explanation:

By pumping three (3) Na+ to the outside and two (2) K+ to the inside of the cell, there is a net positive charge on the outside leaving the inside of the cell electronegative. This process is achieved by the Na+/K+ pump and is a process that consumes ATP energy.

This is much more important in a neuron cell who ¾ of its energy is used to maintain  a -70mV resting potential that is important for the nerve to pass impulse when depolarised.

In other cells, the gradient created in important in maintaining the homeostatic osmolarity inside the cell to avoid swelling and lysis of cells due to uptake of excess water by osmosis. The Na+ gradient is also used to import other molecules into the cell such as glucose and amino acids. These molecules are coupled with Na+ and then are absorbed efficiently as the Na+ flow back inside the cell down the Na+ concentration gradient.

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4 0
2 years ago
Carbohydrates, such as glucose, are excellent sources of immediate energy for living organisms. More complex carbohydrates, such
nydimaria [60]

Answer:

The correct answer is option A.

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Carbohydrates are one of the important biomolecule present on the earth. they are made up of carbon(C), hydrogen(H) and oxygen (O) in 2:1 ratio.

The carbohydrates play significant roles in organisms as:

1. Source of energy : undergo breakdown to provide energy.

2. Storage form: glycogen in animals and starch in plants.

3. Structural role: cellulose in plant cell wall provide the structural hardness and rigidity to the cell wall. Cellulose is a polysaccharide formed by the polymerization of D-glucose via f β-1,4 linkage in linear fashion.

Thus, option A is the correct answer.

4 0
1 year ago
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flagellum is the answer! Hope this helps!!!!!

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2 years ago
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The pmi for remains of a body enclosed in a plastic bag could best be estimated by
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The post mortem interval of a body enclosed in a plastic bag could be best estimated by the insects found in the body, in that case forensic science need to listen to what those little creatures have to say, insects could tell if the body has been moved from the crime scene, how long it´s been in an specific place, and how long it´s been since death until found, every group of insects can tell something different, from worms, arachnids to flyes, each one of them has a time to get into the body, so it could tell you for how long it´s been dead.
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