Chapter 28 - Seed Plants

The immature male gametophytes of pine are called?

pollen grains

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

pollination

What is the alternation of generations?

seed plants have life cycles where they spend part of their lives in the multicellular diploid sporophyte stage and part in the multicellular haploid gametophyte stage.

Which generation is the dominant stage for seed plants?

sporophyte

What is integuments?

Double layer of cells surrounding ovule

There are least _____ species of flowering plants worldwide?

300,000

What is resin?

A vicious, clear or translucent substance consisting of several organic compounds that may protect the plant from attack by fungi or insects.

This flowering plant may be the nearest living relative to the ancestor of all flowering plants

Ambroella

What is dioecious?

Has seed cones on the female plants and pollen cones on male plants

What are gymnosperms?

They are naked seeds that do not have endosperm and not located in true fruits (conifers)

Seed plants lack which of the following structure(s)?

a large, nutritionally independent gametophyte

A simple pistil consists of a single?

carpel

The most familiar group of gymnosperms is?

conifers

Motile sperm cells are found as vestiges in these two gymnosperm groups?

cycads, ginkgo

The female gametophyte in flowering plants is also called the

embryo sac

Conifers, cycads, ginkgo, and genetophytes are collectively called?

gymnosperms

A flower that lacks stamens is both ____ and ____

incomplete; imperfect

What are angiosperms?

plants that have seeds and flowers

What is monoecious?

male and female components on the same plant.

After fertilization, the ____ develop(s) into a fruit and the ____ develop(s) into a seed.

ovary; ovule