Bio Chapter 28

The transfer of pollen grains from the male to the female reproductive structure is known as

pollination

The female gametophyte in flowering plants is also called the

Embryo sac

The cross section of an overt reveals that the pistil is

Compound, with three fused carpels

Motile sperm cells are found as vestiges in these to gymnosperm groups

Cycads and Ginkgo

4 divisions of gymnosperms are

1) Cycadophyta 2) Ginkgophyta 3) Gnetophyta 4) Coniferophyta

3 cycles of modification in seed plants

1)Reduced gametophyte 2)Pollination replaces swimming 3)Seed evolved

There are at least _____ species of flowering plants worldwide

300,000

The flowering plant that may be the nearest living relative to the ancestor of all flowering plants is

Amborella

Seed plants lack which of the following structures, a) Ovules surrounded by integuments b) microspores and megaspores c) A large nutritionally independent gametophyte.

C)

A simple pistal consist of a single

Carpel

Conifers, Cycads, Ginkgo and Gnetophytes are all collectively called

Gymnosperms

A flower that lacks stamens is both ______ and ______

Incomplete and imperfect

An immature male gametophytes of a pine are called

Pollen grains

What is an ovule

Produced by seed plants, each one is a megasporangium (seed) surrounded by integuments (seed coat)

After fertilization, the ______ developed into a fruit and the ______ develops into a seed

ovary, endosperm