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Explain how a nerve impulse passes along a non-myelinated neuron
Nerve impulses are electrical impulses that travel along the axons of nerve cells (neurons) carrying various information. Propagation of electricity is possible due to differences in electrical potential bet...
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Paula S.
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Biology tutor
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What's an Apical Meristem
1) Tissue composed of undifferentiated totipoten cells in plants 2) Found in roots and shoots 3) Responsible for vertical growth 4) produces PRIMARY phloem and xylem 5) Produces Leaves and Flowers
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Hans S.
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Explain the process of DNA translation
[Pre-initiation - Specific enzymes catalyse the attachment of amino acids to tRNA, requires ATP] 1) The small ribosomal subunit binds to the 5' end of mRNA and finds the (AUG) start codon 2) Via complementar...
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Hans S.
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Biology tutor
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What is non-disjunction? How can this lead to changes in chromosome number?
Non-disjunction is the failure of chromosome pairs to separate properly during meiosis. This failure of separation usually occurs either in meiosis I (in anaphase I) or in meiosis II (in anaphase II). The co...
KW
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Katy W.
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Biology tutor
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How do the hydrophobic and hydrophilic properties of phospholipids help maintain the structure of cell membranes?
The cell membrane is comprised of molecules with a phosphate head and hydrocarbon tail. The phosphate heads are polar, therfore they are hydrophilic and form favourable interactions with water, so line the o...
AB
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Alexis B.
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Biology tutor
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