(I) explain why the investigation was carried out at 40 C (II) describe the effect of pH on the rate of enzyme activity.

a: the sheep and waste material both release carbon into the atmosphere.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

most community's take hundreds of years to become stable