What similarities do mitochondria and choroplasts share

1 answer:

8 0

also supports and protects and shapes a plant cell and also regulates what moves into the cell can help support the entire plant. What similarities do the mitochondria and chloroplasts share? Both membrane bound organelles have their own DNA and help make energy available to the cell.

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What is the relationship between natural selection and adaptation ?

hoa [83]

Answer:

The difference between adaptation and natural selection is that adaptation is the characteristic while natural selection is the mechanism that increases the probability that an advantageous characteristic is passed on and becomes commonplace.

<h3>Hope it helps you✨. </h3>

Thanks..

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3 years ago

Hurry! Will mark brianlest if correct, worth 11 points! Which best explains the zygote?

Usimov [2.4K]

Answer:

The correct answer is A. It has a diploid number of chromosomes.

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3 years ago

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Explain how the proteins on the surface of white blood cells, pathogens, and transplanted tissues interact to produce an immune

lidiya [134]

Answer:

Explanation:

The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens.

Your body's cells have proteins that are antigens. These include a group of antigens called HLA antigens. Your immune system learns to see these antigens as normal and usually does not react against them.

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3 years ago

In skeletal muscle Catt is essential for the contraction process. For skeletal

zaharov [31]

Answer:

The source of Calcium (Ca⁺⁺) for the skeletal muscle cells is the sarcoplasmic reticulum, the main store of intracellular Ca⁺⁺.

Explanation:

Calcium (Ca⁺⁺) is an ion that plays an important role in muscle contraction, a process that requires high cytoplasmic concentrations of this ion to promote myofibrillary activity.

The sarcoplasmic reticulum (SR) -equivalent to the endoplasmic smooth reticulum- is an organelle that regulates the contractile activity of skeletal muscle. The two terminal cisterns of the SR attach to the T-tube, forming a triad, which surrounds the myofibrilla.

Once the muscle cell receives the signal to contract, the Ca⁺⁺ channels are opened and allow Ca⁺⁺ to enter the cell, promoting the exit of this cation from the SR and increased its cytoplasmic levels. This stimulates muscle contraction.

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4 years ago

What is the electron configuration of an element with atomic number 20? A. 1s2 2s2 2p6 3s2 3p5 B. 1s2 2s2 2p6 3s2 3p6 C. 1s2 2s2

zubka84 [21]

Answer:

electron configuration is 2,8,8,2

Explanation:

1s2 2s2 2p6 3s2 3p6 4s2

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3 years ago