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Alexxx [7]
3 years ago
6

A myofibril is a cylindrical bundle of contractile myofilaments within the skeletal muscle cell. True or False

Biology
2 answers:
r-ruslan [8.4K]3 years ago
5 0

Answer:

True

Explanation:

A myofibril also called muscle fibril found in muscle cells, it is composed of thick and thin filaments of protein Myosin and Actin respectively.

vlada-n [284]3 years ago
5 0

Answer:

The statement is true.

Explanation:

The cells that make up the skeletal muscle are called muscle fibers or myofibril, they are long cylindrical structures surrounded by a plasma membrane called sarcolemma. Myofibrils are recognized as the "contractile elements" of muscles in vertebrate animals, they are composed of contractile filaments also known as myofilaments. They also have several types of proteins that give them elastic and retractable characteristics.

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Oxygen was into ally created in earths atmosphere by___.
Mariulka [41]
Here something that might help 
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Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
7 0
3 years ago
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The distinguishing characteristic between birds and all other organisms is ________.
KatRina [158]

Answer:the possession of feathers

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5 0
3 years ago
Since beans contain the essential amino acid methionine, beans are considered complete protein sources.
Leni [432]
The above statement is false.
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For example, meat, seafood, eggs and dairy are all complete proteins, while plant foods like beans, whole-grains and brown rice are incomplete proteins.
6 0
3 years ago
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Which type of organic molecule is made up of simple sugars that form long chains?
LiRa [457]

Answer:

Carbohydrates

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Explanation:

Carbohydrates

Simple sugars are known as monosaccharides. Carbohydrates also include long chains of connected sugar molecules. These long chains often consist of hundreds or thousands of monosaccharides bonded together to form polysaccharides.

4 0
3 years ago
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Vladimir [108]

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Explanation:

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