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Describe the events that take place to generate an action potential at a nerve synapse

A synapse is a chemical junction between a neurone and another cell. This next cell is often another neurone or a muscle cell. In this case we will describe a synapse between a two neurone cells. When an act...
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Answered by James L. • Biology tutor
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What is the difference between eukaryotic and procaryotic cells?

Procaryotic cells lack organelles (e.g. nucleus) and other internal membrane-bound structures (e.g. endoplasmatic reticulum). Most of their genetic material (i.e. DNA) forms an irregularly shaped structure, ...
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Answered by Sarah S. • Biology tutor
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Explain the key steps in mitosis.

Mitosis is the way in which cells divide. Once one cell has undergone DNA replication, it contains 2 sets of chromosomes ( diploid ). Once mitosis has occurred, there will be two identical haploid cells. Ste...
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Answered by Amy G. • Biology tutor
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How can I differentiate prokatyotic and eukaryotic cells?

The main difference between these two cell types is that eukaryotic cells have their DNA collected inside the nucleus, while prokaryotic cells lack nuclei. Instead, they have a circular piece of DNA called t...
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Answered by Omar A. • Biology tutor
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What is the process of natural selection?

Natural selection is able to occur due to variation within a species. Individuals with certain mutations/alleles may be better adapted to their environment than other members of their species, meaning they w...
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Answered by Adela B. • Biology tutor
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