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What is the pine male gametophyte

pollen grain

In pines, the female gametophyte contains ? each of which contains an ?

archegonia...egg

In pines, an embryo is an

immature sporophyte

In pine trees, pollen grains get to the ovule via the ?

micropyle

What statement is true about the gametophyte tissue that surrounds the pine embryo

It functions as a haploid food reserve

Of the four haploid cells produced by a pine cone's megaspore mother cell, ? survive(s)

one

In the pine, microsporangia form ? microspores by ?

haploid...meiosis

? have palmlike leaves

cycads

? has only one living species today

ginkgos

? leaves have fanlike appearance

ginkgos

? includes three genera that vary greatly in appearance

gnetophytes

? have pines

conifers

? all species produce cones

conifers

? have redwoods

conifers

All gymnosperms:

undergo alternation of generations; seeds do not form in an enclosed structure

From which seed plant sporophyte structure(s) do the immature (unfertilized) gametophytes directly gain water and nutrition

sporangia

The result of heterospory is

the existence of male and female gametophytes

Ongoing trend in the evolution of land plants

reduction of the gametophyte phase of the life cycle

Plants with a dominant sporophyte are successful on land partly because

their gametophytes are completely enclosed within sporophyte tissue

Female gametophytes in the pine life cycle use ? to produce eggs

mitosis

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? sporophyte embryo, female gametophyte, egg cell, megaspore

megaspore, female gametophyte, egg cell, sporophyte embryo

Arrange structure found on male pine trees from the largest to smallest structure; sporophyte, microspores, microsporangia, pollen cone, pollen nuclei

sporophyte, pollen cone, microsporangia, microspores, pollen nuclei

What features of cycads distinguishes them from most other gymnosperms

They have flagellated sperm and are pollinated by animals

What are the products of meiosis in the life cycle of a seed plant

megaspores or microspores

A seed includes contributions from

three separate generations of plants

What structure is a separate generation from the plant sporophyte

A male gametophyte within a pollen grain

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