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Dimas [21]
3 years ago
15

Give two examples of a food chain within the food web

Biology
1 answer:
gogolik [260]3 years ago
3 0

Answer:

1. A three linked food chain - corn -rat- owl

2. A four linked food chain - carrots - rabbit - fox - lion

Explanation:

hope it helps

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Some homeostatic imbalances cause a variable that is normally controlled by negative feedback to be abnormally controlled by pos
tigry1 [53]

Answer:

True

Explanation:

Some deviations from normal homeostasis activate the positive feedback loops to control the conditions which are otherwise regulated by negative feedback mechanisms.

For example, the blood levels of respiratory gases and H+ ions are regulated by a negative feedback system via chemoreceptors. The increased partial pressure of carbon dioxide gas and lowered pH or lowered partial pressure of oxygen in the blood are sense by central and peripheral chemoreceptors which in turn activate the neurons of the dorsal respiratory group (DRG).

The activated DRG triggers an increased in the rate and depth of the breathing to facilitate the inhalation of more oxygen and exhalation of CO2 to restore the normal levels.  

However, hypocapnia inactivates the chemoreceptors and does not allow negative feedback to restore the normal CO2 levels in the blood.  

Under such conditions, the positive feedback loop stimulates the DRG neurons more strongly in response to the increased partial pressure of CO2 above the normal levels than when the partial pressure of oxygen falls below the normal level. These dangerously lowered oxygen levels may also cause fainting.  

5 0
3 years ago
A scientist is trying to determine the evolutionary relationships among species with very similar physical characteristics. one
NARA [144]

Answer:

Amino acid sequence is directly related to the differences in the DNA of the species.

Explanation:

Above situation is related to the evolutionary research in which scientists are in search of common characteristics between species and from those species they will examine the amino acid sequence of proteins because amino acids sequence is directly related to the sequence of DNA and DNA is the main thing among all other variables by which differences in species can be identified effectively.

4 0
3 years ago
You performed a finger sweep for the unconscious, choking child and pulled an object out of her mouth. What is your next action?
AfilCa [17]
For an unconscious child who is choking, the best goal is to remove the foreign object that obstructs the airpath of the system. The basic steps to be performed during basic rescue are as follows: (1) <span>Perform finger sweep (2) attempt rescue breathing (3) perform abdominal thrusts. these steps are done until successful</span>
8 0
3 years ago
Eli wants to reduce his impact on the environment. Which activity should Eli do to help the environment and his community?
Ipatiy [6.2K]
<span>D) reduce the amount of electricity he uses.( good luck m8 tell me if I'm wrong</span>
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How does the change in estrogen (estradiol) levels correspond to the uterine (endometrial) thickness on days 5-14?
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Why is understanding mitts important?( Select the best answer)

1.It helps us understand how organisms repair.

2. It helps us understand how organisms grow.

3. It is important for cancer research.

4. All options correct.
7 0
3 years ago
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