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How can molecules cross a cell membrane?

Semi-permeable membranes in the cell will let some molecules through but not others. There are three main ways in which these molecules can move. 1) Active transportAs the name suggests, here, molecules are ...
JR
2936 Views

I do not understand why some words in French start with "le" "la" "une" or "un". Why isn't it just "the" or "a"?

French can be confusing like that! In English, nouns are neither feminine or masculine. So you can always use the same articles such as "a" or "the". In French, each word has a gender. Fo...
MM
Answered by Marjotte M. • French tutor
3993 Views

Explain the Macro-economic benefits of globalisation.

Globalisation is the increase in connectivity of the world through the trade of goods and services. The effects of globalisation can benefit two different parties: one being producers; the other being consum...
HG
Answered by Harry G. • Economics tutor
2641 Views

Evaluate the claim that German foreign policy was the main cause of First World War

For After 1890, Wilhelm pursued Weltpolitik in which he sought to increase German influence in Africa and the World -> direct competition with Britain and France which then overturns the previous ‘balance...
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Answered by Niya N. • History tutor
6764 Views

Find the coordinates of the point of intersection between the line L:(-i+j-5k)+v(i+j+2k) and the plane π: r.(i+2j+3k)=4.

By inspection we can tell that the line and the plane are not parallel. Since the dot product between the direction vector of the line with the perpendicular vector of the plane was not equal to 0 (i.e. b.n≠...
LV
Answered by Liam V. • Maths tutor
3830 Views