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The Polar Bear is the largest species of bear in the world. With regards to adaptation, suggest a reason for this.

The habitat of the Polar Bears is the arctic. This is a much colder climate than the other species of bear found in the wild. Therefore the Polar Bear has adapted to live in this colder climate. One adapt...

ZF
Answered by Zia F. Biology tutor
5576 Views

Examine the presentation of the male characters in Mary Shelley's Frankenstein

Shelley presents her protagonist Victor Frankenstein as being entirely innocent throughout his youth, as he claims about his parents, 'I was their plaything- their child, the innocent and helpless creatur...

GI
4889 Views

How are impulses propagated along an axon?

The axon is polarised at rest. This means that there is a negative charge within the axon and a positive charge outside. This resting polarisation is caused by a Na/K pump that uses active transport to tr...

ZF
Answered by Zia F. Biology tutor
5562 Views

Describe and explain the process of protein synthesis. (6 marks)

Transcription is the first step of protein synthesis. This involves DNA helicase unwinding the double stranded DNA, and complementary mRNA binding to the DNA bases with the help of the DNA polymerase. DNA...

BS
Answered by Ben S. Biology tutor
49218 Views

A 950 kg car accelerates from 0 to 33 m/s in 11 seconds. a) Calculate the acceleration of the car b) Calculate the force needed to produce this acceleration c) The car claims a top speed of 110 miles/hr. Explain why there must be a top speed for any car

a) a=v-u/t

= 33/1 = 3

b) F = ma

= 950x3 = 2850

c) Friction and air resistance increases with speed, till frictional = max forward force, then force/acceleration is zero

RB
Answered by Raina B. Physics tutor
10310 Views

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