Top answers

Biology
A Level

How does deforestation lead to reduced soil fertility?

Logging and subsequently harvesting trees removes nutrients, like phosphates, from the system. The removal of the vegetation that would also normally act as a protective cover and windbreak increases the ...

MG
Answered by Megan G. Biology tutor
40626 Views

What is Linkage?

Linkage occurs when the genes for two different characteristics are found on the same chromosome. This means that they do not independently assort during metaphase one of meiosis and so pass into gametes ...

MG
Answered by Megan G. Biology tutor
31670 Views

Explain how the lungs are adapted for gaseous exchange.

The lungs are made up of tiny sacs called alveoli which presents a very large surface area for gaseous exchange. The lungs are well supplied with blood due to lots of capillaries covering the alveoli, ...

JT
Answered by Jonathan T. Biology tutor
58635 Views

Garlic contains a chemical called Allicin which has antimicrobial properties. Describe how this could have occurred through natural selection.

 Allicin has antimicrobial properties and can therefore protect garlic from fungal and bacterial infections and is coded for in the DNA of the garlic by an allele.

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LC
Answered by Lorenzo C. Biology tutor
6632 Views

What are the modes of genetic inheritance?

Genetic conditions can be passed on from parent to offspring in a number of different 'patterns;' these are the modes of inheritance.

In autosomal dominant conditions, only one mutated co...

AY
5474 Views

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