Top answers

What are the advantages provided to plant cells by having a cell wall?

Cell walls provide plant cells with protection and structure. Protection may be from adverse conditions or from biotic threats like fungi or bacteria. The structure of the plant is dependent on the presence ...
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Answered by Peter O. • Biology tutor
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What is the mitochondria and what is its role within the cell?

The mitochondria is an organelle found in most cells of eukaryotic organisms, excluding some specific cells such as red blood cells. It has a double membrane and is variable in size (but usually between 0.75...
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Answered by Rosie P. • Biology tutor
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What is a genetic mutation?

A mutation is a random change in the amount of DNA or sequence of DNA nucleotides within a cell. DNA is a double helix with two polynucleotide strands joined by hydrogen bonds between complementary base pair...
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Answered by Krupa R. • Biology tutor
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What is the difference between an allele and a gene?

A gene is a section of DNA coding for a specific protein. This protein will perform a certain function within the organism. You interit two forms of each gene, one from each parent. These are known as the al...
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Answered by Yanina P. • Biology tutor
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What is a pathogen?

A pathogen is a microorganism that causes a disease. Pathogens spread communicable diseases meaning that they are transmitted person to person and are infectious. Types of pathogens include bacteria, fungi, ...
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Answered by Francesca D. • Biology tutor
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