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laila [671]
3 years ago
13

Which one is better for delivering nutrients to the cells; the open circulatory system or the closed circulatory system? Why?

Biology
1 answer:
Dvinal [7]3 years ago
4 0

Answer:

closed circulatory system

Explanation:

The blood is pumped through a closed system of arteries, veins, and capillaries. ... Still, blood can flow backward and the system is only slightly more efficient than the open system of insects. The closed circulatory system has more advantages over the open circulatory system.

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<u>Answer :-</u> <em>Option 2</em> 90 mm is correct.

<u>Explanation :-</u>

  • In the given diagram, we consider the starting point of measurement the value where the mouth of the earthworm is pointed i.e 1.5 cm.
  • So if we count from 1.5 cm that is the start point and then we see the end point i.e 10.5 cm we get,

10.5 - 1.5 = 9.0 cm

So the length of the earthworm is 9.0 cm as seen from the scale.

  • Now to convert cm into mm, we need to know that:

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Thus, to convert 9.0 cm to mm

we need to multiply 9 by 10

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