Top answers

Biology
A Level

I feel like I understand the concept, why I am I still not getting full marks on the question?

Understanding concepts in exams is only part of the battle. To improve your marks you need to improve your exam technique!

For example: Have you correctly interpreted what the question is asking of...

TR
Answered by Tom R. Biology tutor
3770 Views

Explain pieces of evidence that support the theory that mitochondria evolved from bacteria?

Mitochondria are one of the three eukaryotic organelles that have a double membrane (along with chloroplasts and the nucleus), two of which are believed to have evolved from bacteria (mitochondria from Pr...

AL
Answered by Angus L. Biology tutor
16531 Views

What factors affect the rate of conduction of an action potential (AP) down a neurone?

  1. MYELINATION 

A lipid myelin sheath is wrapped around the axon of the neurone in SEGMENTS. Only the parts of the axon exposed contain Na/K channels that will participate in the conducti...

FA
Answered by Fahad A. Biology tutor
5142 Views

Outline what happens to chromosomes during the mitotic cell cycle.

In the mitotic cell cycle, during the synthesis stage of interphase the DNA is replicated in each chromosome histone protein. In the first stage of mitosis, prophase, the chromosomes become visible due to...

ID
Answered by Ines D. Biology tutor
21744 Views

How can urine be used to detect pregnancy?

The hormone Human Chorionic Gonadotrophin (HCG) starts to be secreted six days after conception from a developing embryo. A pregnancy test stick has three bands. In the first are monoclonal antibodies whi...

AW
Answered by Aimee W. Biology tutor
4676 Views

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