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First organisms on Earth were fully aquatic. About 460 mya a lineage of algae moved onto land and gradually adapted to air and soil. Name two evolutionary problems that first land plants faced when transitioning from water to land?

Examples of physiological problems and the adaptations of plants: Body support. As organisms in water face lower pressure than in air, algae did not need to have composite body parts. When moved onto land, p...
IL
Answered by Ivana L. • Science tutor
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What are the two main processes of glacial erosion and how do they work?

Firstly it is important to understand what erosion is. This is when exposed rocks are broken down by water, wind or ice and the product of this is transported away in one of the aforementioned mediums. It is...
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Answered by Hamish M. • Geography tutor
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How do I structure a comparative essay?

A comparative essay should be made up of equal parts of the texts or poems you are writing about, going into detail about each of the topics but also making comparisons and contrasts throughout. There are tw...
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Analyse the theme of madness in Shakespeare's Hamlet

One of the central controversies surrounding the play Hamlet is as to whether the main character's madness is 'forced' or genuine. With this in mind there are a number of approaches to this question, all of ...
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Answered by Declan H. • English tutor
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What factors cause the shifts and movements of the demand curve?

A movement along the demand curve is caused by a change in price only . If price decreases, quantity increases and demand is said to have extended or expanded. If price increases, quantity decreases and dema...
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Answered by Elliot G. • Economics tutor
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