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Biology
GCSE

Describe the process of speciation

This sort of question would usually be a 5 mark question. Speciation is the process of forming a new species. The first stage is when a population is geographically separated so they can no longer interbr...

Answered by Katie S. • Biology tutor
4331 Views

Describe how protein is made in the cell.

The sequence of bases in the DNA determines the exact order of the amino acids in the protein. Every three adjacent bases on the DNA strand, called a codon, encodes a particular amino acid. The DNA cannot...

Answered by Aisling M. • Biology tutor
6213 Views

describe Charles Darwin's theory of evolution via natural selection (3 marks)

(1) A mutation / variation in an individual(2) makes them better adapted to survive in their environment(3) This allows them to reproduce

Answered by Nikola J. • Biology tutor
2515 Views

A large amount of untreated sewage entered the river. Many fish died. Untreated sewage contains organic matter and bacteria. Explain why many fish died. (5)

Sewage entering the water caused plants to die.Bacteria then decayed this dead organic plant matter (1) through digestion (1).These bacteria will carry out aerobic respiration, using oxygen (1).This there...

Answered by Joy C. • Biology tutor
11596 Views

Compare the structure of eukaryotic and prokaryotic organisms

Typically, such questions are 6 markers. Prokaryotic cells are often found in bacteria, the smallest organisms, often made out of single cells. Eukaryotic cells are much more complex and are often found i...

Answered by Alexandra P. • Biology tutor
6662 Views

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