28. Plants

In the life cycle of a fern, the multicellular male gametangium (the sex organ that produces sperm cells) is called a(n) __________.

To examine meiosis in ferns, you would study __________.

In the life cycle of ferns, the multicellular female gametangium (the sex organ that contains an egg) is a(n) __________.

The "dots" on the underside of a fern frond are spore cases; therefore, what is true of the plant to which the frond belongs?

Where would you find a fern gametophyte?

Fern gametophytes are __________.

In sporophyte ferns, the leaves are __________.

What is the evolutionary significance of megaphylls?

Vascular tissues of plants include __________.

The first large forests formed in the Carboniferous period. The decrease in CO₂ levels by all of these plants caused __________.