The answer is <span>D) myofibrils
And the myofibrils are composed of sarcomeres
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The end result of cytokinesis indicates the two cells with identical copies of DNA arise from a single parental cell.
<h3>What is Cytokinesis?</h3>
Cytokinesis may be defined as the process of separation of the cytoplasm at the end of mitosis.
Cytokinesis is the phase of mitosis which involves the overall division of cytoplasm and the construction of two copies of cells with identical DNA content.
It occurs after the process of karyokinesis, which results in the formation of two daughter cells from a single parental cell.
Therefore, it is well described above.
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Answer:
Mechanical barriers — which include the skin , mucous membranes , and fluids such as tears and urine — physically block pathogens from entering the body. Chemical barriers — such as enzymes in sweat , saliva , and semen — kill pathogens on body surfaces.
The correct answer is option d, that is, there is a forest where many trees are absorbing carbon.
The tendency of the forests to absorb carbon dioxide is associated with numerous elements, that is, how the forests are managed, the age of the trees, the nutrient content of the soil, the local environment, and the level of precipitation.
It has been found that the established forests, that is, found from the boreal forests in the north to the tropical rainforests in the south, captivates about 8.8 billion tonnes of carbon dioxide in a year.
Think of a stroke as a "brain attack"— it is an emergency! When symptoms appear call 911 immediately; every minute counts. A stroke occurs when the brain is deprived of blood supply. Without oxygen brain cells die. Depending on the area affected, a person may have problems speaking, walking, seeing, or thinking. It may result in permanent brain damage, disability or death. If the stroke is caused by a blood clot, a clot-busting drug may be given to restore blood supply.To understand stroke, it is helpful to understand the circulatory system of the brain (see Anatomy of the Brain). Blood is carried to the brain by two paired arteries, the internal carotid arteries and the vertebral arteries (Fig. 1). The internal carotid arteries supply the anterior (front) areas and the vertebral arteries supply the posterior (back) areas of the brain. After passing through the skull, the right and left vertebral arteries join together to form a single basilar artery.
The basilar artery and the internal carotid arteries “communicate” with each other in a ring at the base of the brain called the Circle of Willis by the anterior communicating (Acom) and posterior communicating (Pcom) arteries. The middle cerebral artery is the artery most often occluded in stroke.
