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immunisations - describe two disadvantages of vaccinations ?

Although vaccinations are very beneficial they do carry risk factors - they can cause mild swelling, soreness, a mild form of the disease (they are being vaccinated for), and rare major harmful reactions. I ...
AR
Answered by Ameenah R. • Biology tutor
3878 Views

What are embryonic stem cells? Why are stem cells useful to doctors + why this discovery may make fewer people object to their use

Embryonic stem cells are unspecialised or undifferentiated. This means they can divide to form any type of cell. Embryonic stem cells could be used in medicine to replace damaged cells. This could treat dise...
EJ
3851 Views

How do organims evolve via natural selection?

Natural selection is all about the 'survival of the fittest' - the organisms which are best suited to their environment are most likely to survive and have offspring, leading to a change in allele frequency ...
KJ
Answered by Katie J. • Biology tutor
2790 Views

How does the body respond to an increase or decrease in temperature to maintain homeostasis?

Increase in temperature:Sweat produced from sweat glands increases energy transfer away from the body when it evaporates.Vasodilation of blood vessels close to the surface of the skin, which increases energy...
AM
Answered by Arianne M. • Biology tutor
3699 Views

Can you please describe 3 cell structures that a plant cell has that an animal cell does not have.

Chloroplasts- green organelle that contains chlorophyll which absorbs sunlight needed for photosynthesis (LIKE A SOLAR PANEL) Cell wall - they have in addition to a cell membrane a cell wall made of cellulos...
JD
Answered by Jonathan D. • Biology tutor
3108 Views