Please help its for an exam

In the experiment that Valery designed and conducted at Pothos plants, one is the experimental group and one is the control group, and together they show the effect of the direction of light.

Explanation:

In a research experiment, the experimental group represents the subjects who are subjected to an independent variable - the one that is modified to observe an effect - while the other group is not exposed to the variable, and represents the control group.

In Valery's experiment, the group of plants exposed to light in one direction —independent variable— represents the experimental group. The plants that receive light in all directions is the control group, without intervention of variable.

Both groups of plants were exposed to light, one coming from a single direction and the other without changes in the direction of light, however, only the experimental group would have changes in the direction of growth, bending its stems and leaves, while the control group grew without changes.

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: