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Nitella [24]
3 years ago
7

Summarize why the fish heart and circulatory system are considered important evolutionary changes

Biology
1 answer:
malfutka [58]3 years ago
3 0
Fish has a singular circulatory system, means the blood carrying oxygen from pulmonary circuit will be dumped into the same chamber as the blood carrying wastes and CO2 in the heart, because the heart has only one chamber. 

amphibians has a 3 chamber heart, but still not a complete separated pulmonary circulation. However, it does have 2 loops at this stage. Of course birds and mammal also has this feature. So the distinction will be between fish and amphibian, which is the evolutionary double loop pathway. 
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The answer should be true
8 0
3 years ago
1. What class of biological molecules does sugars belong to?
blondinia [14]

1. Sugar is a monosaccharide or a disaccharide. Sugars are also known as any sweet crystalline solid disaccharide (sucrose).

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3. Proteins and lipids are the molecules that serve as a source of energy in our body.

4. We know how much energy different types of food have due to the presence of macromolecules in them.

5. The main role of physical activity and exercise in balancing our energy consumption and energy expenditure is that physical activity consumes a high amount of energy for its activities.

<h3>What class are sugars related to?</h3>

Sugar belongs to the class of carbohydrates, carbohydrates, sugar, carbohydrates are the molecules that condense carbon, hydrogen, and oxygen. Your body smashes down carbohydrates and changes them into a simple sugar called glucose. This ready form of energy is carried through the blood and delivered to every cell. The supply of glucose needs to be constant and dependable, so your body has developed several systems to make sure of this supply and get the energy.

Other molecules, such as fatty acids and proteins, can also serve as energy sources when they are funneled through suitable enzymatic tracks. sugar depends on many factors, counting your height, age, general state of health, job, time off time activities, physical activities, genetics, body size, and environmental factors.

Learn more about it Sugar here: brainly.com/question/542580

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6 0
2 years ago
Design an experiment to answer the question, what is the effect of caffeine on the rate of mitosis in frog eggs? Label: hypothes
gladu [14]

The answers are the following:

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 - Control group: rate of mitosis in frog eggs no treated with caffeine

4 0
3 years ago
What is the difference between magma and lava?
Afina-wow [57]
Magma is molten rock made underneath earths crust while lava is molten rock that is flowing on top of earths surface. 
 
I hope this helped :)















8 0
4 years ago
Read 2 more answers
Which of the following statements is true?
choli [55]

Answer:

D. Over fifty chemicals in tobacco are known to cause cancer.

Explanation:

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Any form of tobacco is dangerous.

Alcohol is definitely responsible for more than 10% of fatal automobile accident.

6 0
4 years ago
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