Deep in the tropical rain forest, a botanist discovered an unusual plant with vascular tissues, stomata, a cuticle, flagellated sperm, cone like reproductive structures bearing seeds, and an alternation-of-generations life cycle. He was very excited about this discovery because it would be rather unusual for a plant to have both:

a) A cuticle and flagellated sperm.
b) Seeds and flagellated sperm.
c) Vascular tissues and alternation of generations.
d) Alternation of generations and seeds.

d) is the correct option

Explanation:

It is unusual for a plant to have both alternation of generations and seedsAll plants undergo a life cycle that takes them through both haploid and diploid generationsThe multicellular diploid plant structure is called the sporophyte, which produces spores through meiotic (asexual) divisionThe multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametesThe fluctuation between these diploid and haploid stages that occurs in plants is called the alternation of generationsIn a seed, the embryo develops from a fertilized egg, while still inside the seed the embryo forms its first leaf (cotyledon) and starts to develop a stem (hypocotyl) and root (radicle)The tough seed coat protects the embryo and keeps it from drying out until conditions are favorable for germinationThe stored food in a seed is called endospermIt nourishes the embryo until it can start making food on its own