12. are tubelike cells that carry food from the leaves to other parts of the plants
a. chloroplasts
b. xylem
c. pigments
d. phloem

13. These plants produce seeds and each seed contains a sporophyte surrounded by protective tissue.
a. nonvascular seed plants
b. vascular seed plants
c. vegetative reproduction
d. tracheophytes

14. What plant reproduction requires the joining of an egg cell and sperm cell?
a. sexual reproduction
b. pollination
c. asexual reproduction
d. vegetative reproduction

15. This plant reproduction does not require the union of sperm cell and egg. a. pollination
b.vegetative reproduction
c.sexual reproduction
d. asexual reproduction

16. How do nonflowering plants or seedless vascular plants reproduce?
a. The plants reproduce through seeds. b. They reproduce through wind and bear seeds in open cones.
c. They reproduce through male and female cones.
d. They reproduce through spores.​