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Biology
A Level

How does the process of eutrophication work?

As we know, fertilisers are used by farmers to increase crop yield, and artificial fertilisers in particular are very high in nutrients such as phosphorus and nitrogen which stimulate plant growth. Howeve...

Answered by Daisy H. Biology tutor
5596 Views

Outline the process of phagocytosis by macrophages.

Initially, the bacteria/pathogen will bind to a receptor located on the surface membrane of the macrophage. Pseudopodia will form around the bacteria, resulting in the macrophage surrounding the bacteria/...

Answered by Biology tutor
3258 Views

Outline the structures involved in the mammalian gaseous exchange system. For each structure explain how it increases the efficiency of gaseous exchange [6 marks]

Trachea- c shaped cartilage provides structure and support, goblet cells and ciliated epithelium, secrete mucus to trap dust and pathogens and waf...

Answered by Biology tutor
10384 Views

How exactly do you explain mitosis?

preceded by interphase - DNA is being replicated and the two identical copies remain joined at centromere.-prophase - visible chromosomes and centrioles move to opposite poles spindle fibres develop, nucl...

Answered by Ryanne F. Biology tutor
2106 Views

Explain the process of inspiration and the various muscles involved.

During inspiration the diaphragm contracts and flattens and the external intercostal muscles contract. This moves the rib cage up and out and increases the volume of the thorax. This reduces the pressure ...

Answered by Ravi B. Biology tutor
2467 Views

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