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anzhelika [568]
2 years ago
14

What organelles do plants have in their roots that helps them to sense gravity?

Biology
1 answer:
harina [27]2 years ago
8 0

statocytes, organelles do plants have in their roots that helps them to sense gravity, correct answer is B.

what are statocytes ?

In higher plants, statocytes are the cells which sense gravity. They contain amyloplasts-statoliths, amyloplastic organelles which are filled by starch or sediment at the bottom of the cells. Coleoptiles, shoots, and inflorescence stems all have an elongating area that really is home to statocytes.

how do they help in sensing gravity ?

When the plant is reoriented in the gravity field, the starch-filled plastids (also known as statoliths) in the statocytes, that are highly polarized cells, fall to the physical bottom.

Hence, statocytes help in sensing gravity.

Learn more about statocytes here:-

brainly.com/question/924275

#SPJ1

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What is the relationship among organs, cells, and tissues?
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Answer:

(Have a nice day)

¶Emma Jess¶

Explanation:

Two or more tissues operating together.

MORE INFORMATION;

Cell is that basic unit of life.

Group of cells working together a specific function of tissue.

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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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