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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

NJ
Answered by Nikola J. Biology tutor
2946 Views

(x+3)(x+2)

Innerinner + outerouter + innerouter + outerinnerCheck if anything could be added together to simplify the terms
Result = x2+5x+6

AO
Answered by Abdelrahman O. Maths tutor
1464 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...

JC
Answered by Joy C. Biology tutor
12470 Views

Solve the following pair of simultaneous equations: 2y - x = 3, y + 4x = 4

There are 2 main methods for solving simultaneous equations: 1) by substitution, and 2) by elimination. Have a look at how each method works and pick the one that's best for you! In orde...

SP
Answered by Saranya P. Maths tutor
3328 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...

AP
Answered by Alexandra P. Biology tutor
7251 Views

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