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SSSSS [86.1K]
3 years ago
7

4. Which of the three major types of membrane receptors is often used by bacteria to cause infections?

Biology
1 answer:
vodka [1.7K]3 years ago
4 0

Answer:

on channel-linked receptors, G-protein-linked receptors, and enzyme-linked receptors.

The ability of cells to communicate through chemical signals originated in single cells and was essential for the evolution of multicellular organisms. In multicellular organisms, cells send and receive chemical messages constantly to coordinate the actions of distant organs, tissues, and cells. Cells can receive a message, transfer the information across the plasma membrane, and then produce changes within the cell in response to the message. Single-celled organisms, like yeast and bacteria, communicate with each other to aid in mating and coordination. Cellular communication has developed as a means to communicate with the environment, produce biological changes, and, if necessary, ensure survival.

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A science student makes the following statement
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<em>The answer is: D) collecting data</em>

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<em>During this process , researchers would use their observational skills and record every notable occurrence that happen to the variables.</em>

<em>The focus on this process is simply to add all relevant data without making any analyzation. That process come later on after the researchers started to change the variables in order to see whether it would create a correlation.</em>

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<u><em>Hope this helps!</em></u>

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3 years ago
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Describe a reason that ecosystem stability is important to the life forms in the ecosystem, and then describe why stability in o
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Different life forms adapt to their environment. Stable ecosystem creates a stable environment for life forms. In stable environment, life forms do not have to adapt all the time and their energy can be invested into other life processes, such as growth, reproduction, etc. Stability of ecosystem is important for adjoining ecosystems because that way boundaries and influences could be extended. Stable ecosystems are able to interact and both benefit from each other.
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2 years ago
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Read the procedure. What is the purpose of the bicarbonate that is dissolved in the water?
xxTIMURxx [149]

Answer:

Through this experiment we study the process of photosynthesis.

• In the begining the leaf disks's tissue has oxygen, this allows them to float.

• Then, in the experiment we infiltrate the leaf disks with a solution that has bicarbonate, and as a result their density changes (it increases) and so the leaf disks sink.

• Once the disks are on the bottom and we direct the light to them the process of photosynthesis starts, being the bicarbonate the source of carbon for the process.

• As we know a product of the photosynthesis proces is oxygen, so when it is released into the leaf disks the overall density changes again and the disks rise.

So as we can see, in this experiment the purpose of the bicarbonate is being the source of carbon for the process of photosynthesis that occurs in the leaf disks.

5 0
9 months ago
9. Assume that a DNA molecule contains 100 base pairs.
Tema [17]
A.) Guanine = 45

B.) Adenine = (100 - 90 )/ 2 = 10/2 = 5

Hope this helps!
3 0
3 years ago
A log has a density of .8 g/cm³. This log will _______ in freshwater, which has a density of 1.0 g/cm³ .
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The log will float on the water because his density is lower than the liquid, so it will stay at the top due to Archimedes' principle.

<span>Archimedes' principle is a physical law that describes the upward force (the vertical thrust) experienced by any body immersed in a fluid (liquid or gas). This force is strongly related to the density of both the fluid and the body.
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You can try the experience at home, by using an object that has a lower density than the water like the sunflower oil, you will see that it will stay at the top of the water too.
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3 years ago
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