The answer is intercalated discs. They allow the heart muscle cells to function as one organ due to a phenomenon known as syncytium. This is where uninuclear cells fuse to form an apparent multinucleate cell. This way the heart muscle cells can contract in synch. Intercalated discs appear in the sarcomere's (of the muscle fibres) Z line.
The DNA is involved in both the process of inheriting traits and making proteins. It is a material that can be passed on to the next generation and determines the traits of an individual. When the protein is made, the cells can now express the trait or carry out the function.
The answer is 46.
Somatic cells means body cells, including your skin cells, muscle cells, stomach cells etc. All of them has 46 chromosomes, in human. They have the complete set of chromosomes.
Meanwhile the only cells that have different chromosomes are the gametes. They only have half of the chromosomes than the somatic cells, in order to restore the correct number of chromosomes of offsprings.
Therefore, if you cut your arm, your body produce new skin cells by the process of mitosis, where the new cells would be genetically identical to the parent cell, which is the older skin cells. So, the answer is 46.
plant growth
animal actions
pressure release
Explanation:
The causes of mechanical weathering of rocks include plant growth, animal actions and pressure release. Acid rain and carbon dioxide leads to chemical weathering of rocks.
Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soil.
- Mechanical weathering is also known as physical rock weathering.
- In this type of weathering huge masses of rocks are broken down into tiny pieces.
- When plant grows on rocks, their roots penetrates through cracks in the rock and can disintegrate it.
- Some animals burrow and bore deep into rocks.
- When a rock mass is lifted from the top of another, pressure release leads to the formation of exfoliation in which a rock resembles an onion peel.
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