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pochemuha
3 years ago
15

What is the three R's of conservation ??

Biology
2 answers:
blagie [28]3 years ago
7 0
Reuse, Reduce, and Recycle are the 3 R's in conservation.

Hope this helps :)
lord [1]3 years ago
7 0
Reduce, Reuse, Recycle
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Drag each label to the correct location on the diagram.
jeyben [28]

The skeletal muscle, responsible for voluntary contraction is composed of 1) Myofilaments 2) Myofibrilles 3) Muscle fibers 4) Muscle (from the left to the right in the image)

<h3>What is the composition of the skeletal muscle?</h3>

The elements composing the skeletal muscle are,

  • Myofilaments ⇒ Actine and miosine
  • Sarcomere ⇒ It is the functional unit with the contractile apparatus. Composed of the Z band, A and I bands, and H zone.
  • Myofibrilles ⇒ They have the Functional units
  • Muscle fibers ⇒ Surrounded by endomysium
  • Fascicle ⇒ Group of fibers surrounded by perimysium.
  • Muscle ⇒ Group of fascicles surrounded by epimysium.

The sarcomere is the contractile unit in a skeletal muscle. The thick myosin myofilaments are located in the central region of the sarcomere, which corresponds to the A band.

Thin filaments united to the Z lines, extends to the interior of the A band until they reach the border of the H band.

The I band is formed solely of thin actin filaments, belonging to two sarcomeres adjacent to a Z line.

When the muscle contracts, the muscular fiber gets shorter and thicker due to the reduction in length of the sarcomere.

  • The H line and the I band get shorter.
  • The Z lines get closer to the A band, meaning that they get closer to each other. The A band keeps constant in length.
  • This change is produced by movement mechanisms that involve a change in the relative position of actin and myosin filaments.

For a better understanding about muscle contraction, look at the attached files.

From the left to the right,

1) Myofilaments

2) Myofibrilles

3) Muscle fibers

4) Muscle

You can learn more about skeletal muscle structure at

brainly.com/question/11246024

brainly.com/question/12213587

#SPJ1

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2 years ago
is it possible for technological advancements to have both positive and negative effects on the world
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Yes it is, because not all technological advancements will be used correctly. For example nuclear technological advancements looked like a good idea back when they invented it, but now countries are trying to get nuclear weapon and plant locations so they can possibly use that in a war against another country 
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Explaining of matter when it is heated known as
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When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... Solids, liquids and gases all expand when heat is added.  Matter can change from one state to another when thermal energy is absorbed or released. ... heated, it absorbs thermal energy and its temperature rises. At some point, the temperature stops rising and the ice begins to change into liquid water. The change from the solid state to the liquid state is called melting.

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Which feature do prokaryotic and eukaryotic cells share?
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The correct option is B. 
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A student run10m/s what does it means<br><br>​
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