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Sergeeva-Olga [200]
4 years ago
10

7. Application: Have you ever had a cut before and wondered why it stops bleeding? It is actually a very complex process

Biology
2 answers:
svlad2 [7]4 years ago
6 0

Answer:it's negative feedback mechanism

Explanation: because negative feedback is about to maintain normal condition of the body

dmitriy555 [2]4 years ago
3 0

Answer:

When there is a cut, and platelets are coming, its positive feedback. But when the clot is formed and increased platelets concentration at the site create a negative feedback to stop sending more platelets for clot formation.

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Which substance can enter a cell by diffusion without having to be digested
kvv77 [185]
Water because the others are to complex to be diffused with out being digested but water can be diffused as if.
3 0
3 years ago
Explain why catalase activity is considered a virulence factor? in terms of bacteria?
elena55 [62]

Answer:

Catalase allows the decomposition of the hydrogen peroxide.

Explanation:

The virulence factor is any molecule secreted by bacteria that allow them to colonize in host.

The enzyme catalase allows the splitting of hydrogen peroxide in water and oxygen. This process prevent them from  ROS that is reactive oxygen species. Thus, catalase activity is considered as a virulence factor.

5 0
4 years ago
Numbers 1-5, if you know the answer to any of them, even just one, that would help:)
trapecia [35]

1.  Respiratory brings oxygen and nutrients to the cells, while the circulatory

moves gases in and out of the blood. These work together because they have to exchange carbon dioxide and oxygen with each other.

2.   The main parts and functions of the respiratory system are, the nose, pharynx, larynx, trachea, bronchi, and the lungs. As I said in the first answer, The respiratory brings oxygen and nutrients to the cells.

3. The main parts and functions of the circulatory system is the heart, lungs, arteries, veins, coronary, and portal vessels. The circulatory system moves gases in and out of the blood.

4.  There are two main parts in your lungs, the pharynx, and the larynx. So, when you swallow food, the epiglottes blocks the entrance to these two main parts. Simply..if you could breath while doing this..I think you could die.

5. They are connected to capillaries that distribute blood to and from all the cells.

3 0
3 years ago
The conservation of charge principle states that _________. Select all that apply.
d1i1m1o1n [39]

Answer:

Where is the picture? .. If no picture I cant answer

3 0
3 years ago
Natural selection vs artificial​
Anna35 [415]

Answer:

Please read the explenation for I must go into detail to explain this.

Explanation:

So before I answer your question, I am going to explain what the two things are.

Natural selection:

Natural selection is the evolution of traits in a species due to changes in genetics that is mainly caused by enviormental problems and changes.

If this is a bit confusing, here is an example:

Lets say that a Mandarin beatroot lizard is being killed off by the Mandarin carrot bird because all the trees in the area have turned yellow. 100 years from the time this happened, the Mandarin beatroot lizard that's population was 85% red and 15% yellow is now 90% yellow and only 10% red.

This is because of natural selection. THe Mandarin carrot bird was killing a large portion of the red population. The yellow population was killed only occasionaly. When the Madarin beatroot lizard went to breed, there were more yellow lizards breeding than  red lizards. If you know how genetics work, then you know that in simple terms, this means more lizards will be yellow in the next genetration.

Slowl;y as the generations passed, more and more yellow lizards were bred and born. 100 years later, over generations and generations, the population was almost coimpeltly yellow.

Artifical selection:

Artifical selection is where the human race selects a species and bred specific organisms of that species so that the specific trait being bred for is more evident in the species.

Again, if this is confusing, here is an example:

The lab NV-110 was taking bearlybubble wolves with shorter noses and breeding them together. After 30 years, and many generations, the bearlybubble wolves had noses that were half a inch shorter than the orginal bearlybubble wolves. When the new wolves were let into the forest they had been taken from, half of the died in the first week due to starvation.

The humans took specific traits in a species and bred them together, this process was repeated over 30 years. The specific trait of the new generation of orgniasms has been changed, but this change affected the orgnaisms survive, and was dentrimental to the species.  

So now knowing the two things, what do you think the difference is? Think about ti for a minute before reading more.

The difference betweent the two types of selection is:

  1. Artifical selection can harm or possibly nuetral for the organism, wheareas natural selection will be helpful or nuteral to the organism.
  2. Artifical selection involves humans, wheareas naturals election does not,
  3. Artifical selection does not need any specific change in the enviorment or world to happen, wheareas natural selection does.
  4. Artifical selection is usally quicker than natural selction for artificial selection is purposful breeding, whereas natural selection is by-chance breeding.

I hope this make sense to you, I can try to make this simpler or more detailed if you want me to. ;)

4 0
3 years ago
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