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Define the different types of reproduction and list the advantages of each type of reproduction.

Asexual reproduction: only needs one parent and uses the process of mitosis to create identical copies (clones) of the parent cellSexual reproduction: two parents are needed in sexual reproduction and uses t...
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Answered by Lucy M. • Biology tutor
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Describe what happens at a synapse.

An action potential (electrical impulse) arrives at a synapse (a gap between two neurones) which causes calcium voltage-dependent gates to open in the presynaptic neurone. An influx of calcium ions triggers ...
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Answered by dana A. • Biology tutor
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What are the 3 main types of chemical bonding? Give definitions of them.

IonicCovalentMetallic Ionic bonding The electrostatic attraction between positive and negative ions Covalent bonding Electrostatic attraction between a shared pair of electrons and the nuclei Metallic bondin...
Answered by • Chemistry tutor
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How does the reflex arc work without going to the brain?

The reflex arc is designed for quick, reactive movements that are instinctive. E.g. when we touch a hot pan, we need to react quickly otherwise our hand will get really badly burned. If the signal went from ...
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Answered by Armaan G. • Biology tutor
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List simple experimental tests to determine if either Hydrogen, Oxygen, Chlorine or Carbon Dioxide gas was produced in a reaction. State conditions and expected positive results for each

Presence of:H 2 : Squeaky Pop Test: use a lit split to light a small sample of gas in a test tube. If Hydrogen, then a Squeaky pop will occur. O 2 : Glowing Splint Test: Add a still glowing splint to a small...
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Answered by Daniel S. • Chemistry tutor
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