Question

Embryos are an evolutionary adaptation of
A. avascular plants only.
B. seed plants only.
C. angiosperms only.
D. all terrestrial plants.
E. all vascular plants.

Answer 1

embryos for plants are inside of the seeds, so any seeding plant; this question is odd in that all angiosperms are seeding plants, but not all seeding plants are angiosperms. Angiosperms are 'flowering' plants or, more specifically, plants that produce fruit. If you have a book, check the definition of 'seed plants' and 'embryos'.