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Describe how the origin of living systems is explained by natural processes. Please provide supporting evidence for hypotheses.

Numerous experimental investigations have been conducted to explain the diversity and unity of life. Specifically, these models have aimed to provide evidence that the conditions of early Earth provided an e...
RS
Answered by Ruth S. • Biology tutor
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Explain how ATP is produced through chemiosmosis during respiration.

First, it is important to note that a concentration gradient of H + ions is generated between the matrix of the mitochrondria and the inter-membrane space. This is because H + ion pumps pump H + ions from th...
PS
Answered by Pratyusha S. • Biology tutor
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What is the sliding filament mechanism?

The sliding filament mechanism is a model used to show the way in which muscles contract. It involved 3 components - Myosin, Actin and Tropomyosin. Myosin has a head like projection to which an ADP molecule ...
JC
Answered by Joseph C. • Biology tutor
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What is the role of the myelin sheath in the transmission of electric impulses in the nervous system?

It is important to note that the IB syllabus expects the students to understand that "The myelination of nerve fibres allows for saltatory conduction." What this essentially means is, that the myel...
CS
Answered by Clara S. • Biology tutor
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How do you explain the change in membrane permeability as temperature increases?

Generally, increasing the temperature increases membrane permeability. At temperatures below 0 o C the phospholipids in the membrane don't have much energy and so they can't move much, which means that they'...
EF
Answered by Ella F. • Biology tutor
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