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Before viruses can reproduce, they must infect a host cell.
Viruses need a way to enter the body before they can infect a host cell.
The landscape in which limestone is eroded to form deep valleys and cavers are called Karst landscape or karst topography. This kind of development start occuring whenever the acidic water starts breaking down the bedrocks near the cracks. As the bedrock starts breaking down slowly, the cracks start to open up creating bigger holes. with passage of time the holes will become big enough to create an underground drainage system for the surface water to flow and form underneath. If the water is unable to flow out and becomes stagnant, then the Karst will start getting bigger.
Answer:
C. Carbon dioxide is a waste in cellular respiration in BOTH plants and animals
Explanation:
Cellular respiration occurs in animals and plants. It breaks down sugar in the presence of oxygen to release energy in the form of ATP. This process releases carbon dioxide and water as waste products.
A cell must undergo the process of meiosis in order to have genetically different cells at the end of cell division. Meiosis produces four daughter (haploid) cells, each of which is genetically distinct from the parent cell from which they arose.
Answer:
<em>D) lining up of chromosomes in the cell</em>
Explanation:
Prophase can be described as the first stage of cell division. During this phase, The chromatin material condenses and becomes compact so that the chromosomes become visible. The nuclear envelope disintegrates and the nucleolus disappears. Hence, the choices mentioned in option A, B and C occur by the end of prophase.
Metaphase is the third phase of cell division. During this phase, the chromosomes line themselves in the centre of the cell. Hence, the lining of the chromosome does not occur by the end of prophase. This occurs during the third stage.
