Question

Difference between pteridophytes,angiosperms and gymnosperms

Answer 1

pteridophytes

first form 2N plants or sporophytes.

xylem and phloem are formed.

root,stem,leaves are formed.

no fruit,no seed,no flower.

angiosperms

ovules are enclosed in the ovary.

archaegonia are absent.

each ovule has only one female gamete.

double fertilization.

endosperm is triploid and formed after fertilization.

gymnosperms

ovules are naked in the ovary.

2 to 8 archaegonia are present.

one ovule has 2 to 8 female gametes.

no double fertilization.

endosperm is haploid and formed before fertilization.

Answer 2

Answer:

Angiosperms have flowers while gymnosperm lack it .

Gymnosperms have naked ovules while angiosperm have fruit wall to cover ovules

In gymnosperms erect and branched stem is present while angiosperm do not have erect stem.