This diagram shows how seed plants are grouped which is the missing label?

Angiosperms

Step-by-step explanation: A gymnosperm is a plant without a flower or fruit protecting its seeds. Angio-sperms. Angio, means seed vessels. If the seeds are not protected in one group, the other has to be. Hope this helps :)

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq