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Vlada [557]
3 years ago
14

In complete sentences, compare the circulatory system of a plant and an animal

Biology
1 answer:
Advocard [28]3 years ago
8 0
The circulatory system is the form of transport in plants and animals. Animals should have nutrients and oxygen that spread every cell in their body. Plants should have nutrients and carbon dioxide spread in their "body". Both plants and animals must also have waste product away from their systems.
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Answer:

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The range of temperatures in which an insect is able to live and reproduce is one element of that organism's niche, a description of its ecological requirements.
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choli [55]

I believe it is A as well

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2 years ago
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N
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Answer:

C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.

Explanation:

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

In the sarcomere, which is the contractile unit of skeletal muscles, there are

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

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3 years ago
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the answer is 100 grams. the formula for finding mass is density x volume.

i hope this helps!

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3 years ago
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