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Describe the different phases involved in mitosis

In mitosis there are four phases: Prophase, Metaphase, Anaphase and Telophase. The first step is early Prophase, where chromosomes condense and become visible through supercoiling and simultaneously spindle ...
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Answered by Arabella H. • Biology tutor
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Use your knowledge of the carbon cycle to indicate the effect of deforestation on the carbon dioxide concentration in the atmosphere, and the effect this change will have on the environment.

Atmospheric CO2 is used by trees for photosynthesis. Deforestation means that there are less trees undergoing this photosynthesis reaction, so less CO2 is taken from the atmosphere. The trees that are cut do...
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Answered by Áine C. • Biology tutor
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Why is glycogen suitable for energy storage in cells?

Glycogen is the storage form of glucose found in liver and muscle cells. It is formed during glycogenesis when excess blood glucose is taken up into liver and muscle cells via insulin release. When blood glu...
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Answered by Mahdia O. • Biology tutor
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What is the structure of an atom?

Atoms are really tiny particles that make up all substances in the universe. An element is made of one type of atom. An atom has a small central nucleus made up of smaller sub-atomic particles called protons...
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Answered by Emma T. • Chemistry tutor
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When should I use the perfect tense and the imperfect tense?

The perfect tense is used to describe a completed action in the past. (Sometimes, time connectives are used as an indication that an action is complete). e.g. Hier soir, j'ai fait mes devoirs - Yesterday eve...
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Answered by Jenai C. • French tutor
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