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Mashcka [7]
3 years ago
5

What is the difference between an element and a molecule?

Biology
1 answer:
slavikrds [6]3 years ago
3 0
Well, usually the qn would be what is different between a compound and a molecule. but if you ask like this then, here goes.

An element is the simplest substance that can not be broken down into its components using physical processes. exp: Na, S, K

A molecule is a substance that make up of an element bonded together.
exp: O2, S2, F2(diatomic molecules)
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Humans, like other organisms, require energy for growth and repair. When cells create ATP for energy, carbon dioxide is produced
ad-work [718]

Answer:

The circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Explanation:

Carbon dioxide produced by the cells and tissues during cellular respiration is removed from the body through the interaction of the circulatory and respiratory system. The medium of transport of carbon dioxide is the blood which carries to the lungs, where it is expelled from the body in ordernto maintain homeostasis in the body.

Carbon dioxide molecules are transported in the blood from body tissues to the lungs in three ways:

1. Dissolution directly into the blood - due to its greater solubility in blood than oxygen, carbon dioxide is dissolved in blood plasma. On reaching the lungs, it leaves the blood by diffusion and is then expelled out of the body.

2. Binding to hemoglobin - carbon dioxide binds reversibly with haemoglobin in the red blood cells to form a molecule called carbaminohemoglobin. When it reaches the lungs, the carbon dioxide freely dissociate from the hemoglobin and is expelled from the body.

3. Carried as a bicarbonate ion - the majority of carbon dioxide molecules are carried as part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. The enzyme carbonic anhydrase within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3) which then dissociates into bicarbonate and hydrogen ions. The bicarbonate ions leaves the red blood cells in exchange for chloride ions in the plasma. The bicarbonate ions then travel in plasma to the lungs, where they enter the red blood cells again. It combines with hydrogen ions from the haemoglobin to form carbonic acid. Carbonic anhydrase breaks carbonic acid down into water and carbon dioxide which is then expelled from the lungs.

8 0
3 years ago
State two ways to prevent or control the spread of infectious, such as AIDS?<br><br> Please help mee
RSB [31]

Answer: Use protective gear like gloves when touching bodily liquid of others. Safely disposing of the needles, gloves etc. Testing for the infectious diseases and using precautions that are given.

Explanation:

8 0
2 years ago
Large multicellular organisms are made of a wide variety of cell types. Do
Murrr4er [49]

Answer:

Yes, All of the cells divide at approximately the same rate, although they may divide at different times

7 0
3 years ago
List 2 adaptations that helped Darwin's finches survive.?
Vaselesa [24]

Answer:

Two adaptations of Darwin's Finches that helped them to survive are:

  • Beak structure.
  • Behavioral adaptations to use tools for foraging.

Explanation:

There are fourteen species of Darwin's finches that originated from a single  species of ground dwelling seed eating finch.

These Finches occupied different niche in the Galapagos island  and were widely studied by Darwin.

These finches are one of the best Examples of Adaptive radiation.

Studies state that during severe drought in Galapagos island most vegetation dried out and a few softer seeds were left.

These few seeds were quickly fed upon by the birds and only dry , hard seeds were left.

Only birds who had large and hard beaks could feed on these hard dry seeds.

To Ensure survival the Finches developed adaptations which resulted in hard and large beaks so that they can feed on those dried hard seed.

Some groups started feeding on insects and got their beaks adapted to capture and kill insects.

Second line of adaptation included changes in behaviour and cognitive intelligence where birds started using tools for foraging.

8 0
3 years ago
How is carbon dioxide affecting climate changes? Is there any evidence showing that humans can work on changing the Carbon Dioxi
Mama L [17]

Answer:

1.) Carbon Dioxide is being used as a greenhouse, preventing the heat from turning into thermal radiation into space.

7 0
2 years ago
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