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sweet [91]
2 years ago
12

What are homologous structures in different species evidence of?

Biology
1 answer:
arlik [135]2 years ago
7 0
A) a common ancestor
Homologous structures are structures that are similar in related organisms. There is a basic pattern of bones which can be inherited from a common ancestor
You might be interested in
Why you need the respiratory system ,when you kick a ball?
Serga [27]

Answer:

Explanation:

You need the respiratory system when you kick a ball because you need to be able to breath but if you are playing soccer this benefits the  cardiovascular fitness level. Cardiovascular fitness is, according to the American Sports Medicine Institute, the efficiency of your heart, lungs and vascular system to deliver oxygen to your muscles to maintain activity.

4 0
2 years ago
Why the horses developed an oxygen debt when they exercised.
user100 [1]

Answer:

The horses developed an oxygen debt when they exercise because they suffered from Exercise-Induced Pulmonary Hemorrhage (EIPH).

Explanation:

A temporary shortage of oxygen in the body tissues during physical exertion such as exercise or a sudden burst of activity is referred to as oxygen shortage.

Horses (compared to humans) are uniquely designed to experience little or none of this.

When the body takes up oxygen, it reacts with glucose to produce energy. This is called Aerobic respiration.

There is also another procedure that the body uses to produce energy. This occurs when glucose is broken down in the cells. After this happens, lactic acid is created but cannot be stored in the body and must be expelled.

This interval when energy is produced without the presence of oxygen is called "oxygen debt".

When a horse is fit, its breathing quickly returns to normal. The longer the time taken for the breathing to return to normal, the less fit the horse is.

One of the factors that can reduce the fitness of a horse is the Exercise-Induced Pulmonary Hemorrhage (EIPH).

This occurs when blood vessle in the lung ruptures causing blood to bleed into the airways. So blood occupies space where oxygen should have. This reduced the amount of oxygen delivered to the blood stream. Hence the oxygen debt takes longer to be repaid.

Cheers

6 0
2 years ago
Byron’s car skidded across the rain-slicked road, into oncoming traffic. He was able to regain control and avoid an accident. As
andre [41]

Answer:

Parasympathetic nervous system

Explanation:

Parasympathetic nervous system (PNS) along with sympathetic nervous system (SNS) makes autonomic nervous system (ANS). ANS controls the functioning of internal processes like digestion rate, heart rate, respiratory rate etc. During a threat or stressful situation SNS is activated. It increases heart rate, respiratory rate and directs blood flow towards peripheral muscles as a part of "fight or flight response". When the situation becomes normal, PNS is activated which restores all the vitals as a part of "rest and digest" mechanism.

Since here Byron almost got into an accident, he was scared a lot due to which his SNS was activated. Eventually when he realized that he is out of danger, his PNS got activated which returned his heart rate and blood pressure to normal levels.

4 0
3 years ago
What cause the air current to curve?
soldi70 [24.7K]

The Coriolis force bends the air current.

Explanation:

  • Coriolis force is an inertial force that opposes or deflects the motion of a freely moving mass from its original path.
  • The Deflection of wind and ocean current on Earth are all the effect of coriolis force.
  • Such an effect is termed as Coriolis effect.
  • Coriolis force act to a particular point of reference and not beyond that.
5 0
3 years ago
Read 2 more answers
All enzymes are examples of organic molecules known as?
Dafna11 [192]

Answer:

<h2>PROTEINS</h2>

Explanation:

Many important molecules in the hman  body are proteins like enzymes, antibodies,  e.t.c.

Enzymes are a type of protein that speed up chemical reactions.

8 0
3 years ago
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