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Explain the functions of the different cell structures in an animal cell

Nucleus - contains the DNA allowing it to control the cells activities. It is the site of transcription where DNA is made into RNA. Ribosomes - the site of protein synthesis where translation occurs. Mitocho...
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Answered by William M. • Biology tutor
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Define osmosis

The (passive) movement of water from an area of high water potential to low water potential across a partially permeable membrane
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Answered by Daria D. • Biology tutor
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Translate the following sentences into Spanish: (1) I bought a new laptop on Saturday. (2) I think that I am going to study Spanish next year.

(1) Compré un nuevo ordenador portatil el domingo.(2) Creo que voy a estudiar el espanol el ano que viene.
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Answered by Gabrielle B. • German tutor
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Can you explain the process of ultrafiltration and selective readsorption?

Ultrafiltration and selective reabsorption are processes which occurs in the kidney to filter the blood. In ultrafiltration, the blood is under a high pressure in the glomerulus which causes ions and small m...
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Answered by Daniel S. • Biology tutor
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Let f(x) = x^3 -2x^2-29x-42. a)Show (x+2) is a factor b)Factorise f(x) completely

a) To show (x+2) is a factor, we want to show f(-2)=0. So (-2)^3-2(-2)^2 -29(-2)-42=-8-8+58-42=0 b) Divide x^3 -2x^2-29x-42 by x+2 to get x^2-4x-21 which we factorise to get (x+3)(x-7). Hence f(x)=(x+2)(x+3)...
Answered by • Maths tutor
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