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What's the difference between Eukaryotic and Prokaryotic cells?

Eukaryotic cells have membrane-bound organelles such as the nucleus, the endoplasmic reticulum and the mitochondria which are not found in the prokaryotic cells. Examples of eukaryotic cells include animal a...
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Answered by Lorenzo R. • Biology tutor
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Smoking is a risk factor for many types of cancer. Explain how smoking can affect the development of cancer. Define risk factors in your answer.

Risk factor - factors that increase the likelihood of developing a diseaseThey may be intrinsic or extrinsic and include factors like age, sex and smoking - for cancerChemicals in cigarettes (including tar) ...
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Answered by Sebastian R. • Biology tutor
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Describe the similarities and differences between the processes of diffusion and osmosis.

Similarities:Molecules move from a higher to lower concentration in both processes - they move down a concentration gradientSo neither process requires energyDifferences:Only water moves by osmosis - which r...
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Answered by Sebastian R. • Biology tutor
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What is a stem cell?

A stem cell is an undifferentiated cell that can differentiate into specialised types of cells such as muscle cells or skin cells. A stem cell can give rise to many cells of the same or different types of ce...
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Answered by Emily G. • Biology tutor
2322 Views

How does the development of antibiotic resistance in bacteria provide evidence for evolution?

A population of bacteria will have lots of variation in characteristics due to mutations in the DNA that each bacteria contains. Some of those mutations may allow a bacteria to be resistant to an antibiotic ...
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Answered by Laurence B. • Biology tutor
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