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docker41 [41]
3 years ago
13

How does oxygen enter your bloodstream? Please help

Biology
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

haemoglobin

Explanation:

Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body

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Scientists rely on models to represent concepts and processes in physical science. Which one of the following is a reason why sc
AVprozaik [17]
In my opinion, the best answer among the choices listed above is option D. The reason why scientists use models because they can <span>represent things that are too small to see. Models are used to describe and explain certain phenomena. Hope this answers the question.</span>
5 0
3 years ago
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No links! pls help
defon

Answer:

I believe its primary succession

Explanation:

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3 years ago
The particles in some system are moving around quickly. a few minutes later, the particles are moving, on average, more slowly.
dimaraw [331]

The change in motion affect the temperature of the system as the temperature of the system is lower now than it was initially. Faster moving particles result in a higher temperature for the system.

<h3>What is temperature?</h3>

It should be noted that temperature simply means the degree of hotness or coldness of a body.

In this case, the change in motion affect the temperature of the system as the temperature of the system is lower now than it was initially

Also, it should be noted that faster moving particles result in a higher temperature for the system.

Learn more about temperature on:

brainly.com/question/17053123

#SPJ4

The particles in some system are moving around quickly. A few minutes later, the particles are moving, on average, more slowly. How does this change in motion affect the temperature of the system? A. The temperature of the system did not change. The speed of the particles has no effect on the temperature, only the type of atom affects the temperature. B. The temperature of the system is higher now than it was initially. Slower moving particles result in a higher temperature for the system. C. The temperature of the system did not change. The speed of the particles does not affect temperature, the number of particles affects the temperature. D. The temperature of the system is lower now than it was initially. Faster moving particles result in a higher temperature for the system.

7 0
1 year ago
Prokaryotic bacteria are surrounded by a ____________ that contains the ____________ to regulate the entry and exit of materials
lukranit [14]

Prokaryotic bacteria are surrounded by a cell membrane that contains the transport proteins to regulate the entry and exit of materials through the cell, the cell wall to help maintain cell shape and structure, and the capsule, which aids against drying out and protects bacteria from a host's immune system.

<h3><u>Explanation:</u></h3>

Bacteria are the prokaryotic organisms that are found in every part of Earth. These organisms do have an interesting ultrastructure. The coverings of the bacteria are three in layer. They are

A. The outer capsule.

B. The middle cell wall.

C. The inner cell membrane.

The capsule is the outermost covering of bacteria that is formed of different slimy materials. These materials contains hygroscopic substances which can absorb water from the surroundings even when the water concentration in outside is very very low. This layer of protection outside bacteria help them to protect themselves against drying out at dry conditions.

The middle cell wall is formed of polymers of N acetyl glucosamine and N acetyl muramic acid. This layer is chitin in nature and is strong enough to maintain the shape and size of bacteria irrespective of outer conditions.

The innermost layer of bacteria is cell membrane which is formed of proteins and lipids bilayer and this cell membrane contains different transport for proteins which help in transport of different substances like water and nutrients inside the cell by means of active transport or passive diffusion.

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3 years ago
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In the hardy-weinberg formula what does 2pq represent
valina [46]
In the Hardy-Weinberg formula, 2pq represents the frequency of the Aa genotype (heterozygous). 
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