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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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Which method gives the actual age of a fossil in years?
tatyana61 [14]

Answer:

  • Radiometric dating methods

Explanation:

Researchers use a clock to estimate the date a rock or fossil was produced in order to ascertain its age. Radiometric dating methods, which are based on the natural radioactive decay of specific elements like potassium and carbon, are widely used by geologists to date ancient events.

<u>OAmalOHopeO</u>

7 0
3 years ago
Help asap‼️Which arrow represents transpiration?<br><br> A<br><br> B<br><br> C<br><br> D
VladimirAG [237]
Transpiration is when extra water is removed from leaves of plants back into atmosphere/ecosystem so it’s gotta be D
5 0
3 years ago
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Which of the following is NOT an example of an anaerobic exercise?
nikdorinn [45]

Answer;

B. Jumping rope

Explanation;

Jumping rope is not an anaerobic exercise but an aerobic exercise.


Anaerobic exercise is a form of high intensity exercise that increase the oxygen debt. However since the muscles require oxygen to maintain prolonged exertion, anaerobic exercises can only last for short periods of time.

Examples of anaerobic activity sprinting, high-intensity interval training, power lifting and most athletic sports.



3 0
3 years ago
Read 2 more answers
What is the difference between positive and negative feedback cycles?
schepotkina [342]

Positive feedback cycles always increase the response. Negative feedback cycles always decrease the response.

Positive and negative feedback mechanisms always work in antagonistic fashion to maintain a homeostatic balance of a parameter such as temperatures or pH in the body. Positive feedback is akin to a gas pedal while negative feedback is akin to a brake and reverse pedal.

Explanation:

An example of a parameter is blood sugar levels. Glucagon is a hormone responsible for positive feedback since it increases blood sugars when levels are low. Insulin, however, is a negative feedback hormone that reduces blood sugars levels when they are elevated. These two work antagonistically to maintain  the right sugar levels in the blood.

Learn More:

For more on feedback loop check out;

brainly.com/question/2902510

brainly.com/question/3120243

#LearnWithBrainly

7 0
4 years ago
Which action best demonstrates the transformation of mechanical energy to heat energy? A(Digesting a meal.) B(burning a candle.)
sveta [45]

Answer: I believe the answer is C(rubbing hands vigorously) .

Explanation:

C(rubbing hands vigorously)  as it is mechanical when rubbing but when rubbed  vigorously it becomes heat energy.

Follow Me me Plaese and make this the brainish answer

7 0
3 years ago
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