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Outline the process of eutrophication

Eutrophication occurs when nitrate fertilisers are carried by ground water into lakes and ponds. The fertliser encourages algal growth in the water, which in turn blocks out sunlight. This causes submerged p...
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Answered by India G. • Biology tutor
5407 Views

What is the differences between mitosis and meiosis?

Mitosis and meiosis are both processes which describe the production of new cells. Mitosis produces 2 daughter cells which are genetically identical to the parent cell. Each daughter cell is diploid (contain...
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Answered by Jennifer T. • Biology tutor
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Explain the all-or-nothing principle for an action potential.

In the resting state, the membrane potential of a neuron is around -70 millivolts (mV). When acted upon by a stimulus , the membrane depolarises as Na + gated ion channels open and allow sodium ions to rush ...
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Answered by Oyku C. • Biology tutor
65260 Views

Explain how hydrogen bonding occurs between molecules of water.

Hydrogen Bonding occurs between 2 adjacent molecules of H 2 O. The polar covalent bond between oxygen and hydrogen creates negative and positive partial charges respectively. There is a weak intermolecular f...
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Answered by Tom H. • Biology tutor
18277 Views

Give 3 differences between DNA and RNA

RNA is single stranded whereas DNA is double stranded RNA has uracil whereas DNA has thymine RNA contain the pentose sugar ribose whereas DNA has deoxyribose
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Answered by Oliver H. • Biology tutor
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