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What is the difference between an animal cell and a plant cell?

It's easy to tell the difference between an animal cell and a plant cell when you look at it,because a plant cell has a rigid wall around it. This keeps the cell in the right shape. An animal cell looks a bi...
EO
Answered by Elizabeth O. • Biology tutor
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What is the role of cilia and mucus in the lungs?

The cilia and sticky mucus work together to protect the lungs from infection, forming what is known as a mucociliary escalator. The mucus traps any bacteria or pathogens as they enter the lungs, and the cili...
CH
Answered by Corrina H. • Biology tutor
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Explain why an artery may be described as an organ.

Tissues are defined as being a collection of different types of cell. Similarly, organs are defined are being a collection of tissues , which are joined in a structural unit to serve a common function.An art...
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Answered by Matt S. • Biology tutor
35639 Views

Discuss the ethical issues of IVF in humans

There are several arguments for having in vitro fertilisation. Firstly, it allows people who couldn't otherwise have children to start a family. Also the embryos that are used for IVF, if there are signs tha...
EC
Answered by Elsa C. • Biology tutor
3055 Views

Explain why haemoglobin in Sickle Cell Anaemia is less effective at carrying oxygen.

The mutation present in sickle cell anaemia causes a change in the primary structure of amino acids in the haemoglobin molecule. This change in primary structure changes the tertiary structure of a haemoglob...
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Answered by Kit T. • Biology tutor
2981 Views