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B-Lymphocytes remain in the bone marrow until they mature and then spread throughout the body, concentrating in the lymph nodes and the spleen.They express a specific intrinsic protein called a B-cell recept...

Don't panic! This is a thought that goes through every student who does IB or A Level Biology, and the answer is that there are an endless number of techniques and tricks that can help every different type o...

1. Fertilisers are washed into waterways by rain or irrigation. 2. The increased availability of nutrients causes aquatic plant life to grow rapidly. 3. An algal bloom occurs, obscuring light from the plants...

Some drugs need to be converted into other molecules so the body can use them effectively. This conversion is done by enzymes, which are protiens. Protiens are made up of amino acids, which are coded for by ...

Meiosis only takes place in the reproductive organs of plants and animals as opposed to throughout the body like mitosis. Meiosis results in the production of 4 genetically different, haploid gametes as oppo...