Part of the medulla in the brain. Responsible for the regulation of the rate at which the heart beats.
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Card 7
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A small cluster of chemoreceptors and supporting cells located in the wall of the carotid artery.
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Card 8
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Receptor cells that detect changes in blood pH.
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Card 9
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A stable community of plants and animals that will remain unchanged unless the environment changes.It results from the process of succession.
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Card 10
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The volume inside the skull. It can be estimated by pouring dry sand into the skull. This gives an estimate of the volume of brain that was inside the skull.
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Card 11
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A protein found in mitochondria, that is needed in respiration. It is useful in studying evolutionary relationships between organisms.
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Card 12
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An enzyme that joins DNA nucleotides together to form a strand of DNA.
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Card 13
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A condition in whichi the individual has three copies of chromosome 21 instead of two. It results from non-disjunction.
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Card 14
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A hole in the skull where the backbone meets with the skull.
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Card 15
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A system in which big groups are suddivided into smaller groups with no overlap.
