Ch 31 Seed Plants

What is the function of the generative cell in conifers?

• Dispersal of the pollen

• Formation of the sperm 


• Growth of the megaspore

• Production of the archegonium 


Ephedrine and Welwitschia are plant members of the phylum

• Hepaticophyta

• Gnetophyta

• Pterophyta

• Cycadophyta

What is the function of pine resins?

• transportation of sucrose to the roots

• reduction of fungal and insect parasitism

• triggering of seed maturation

• aiding in pollen dispersal

Why are conifers and cycads considered gymnosperms?

• The ovule forms the seed.

• The female gametophyte is not completely enclosed in sporophyte tissue at the time of pollination

• The fruit is not fleshy.

• The pollen is wind dispersed.

Which of the following gymnosperms is used for production of lumber, resin, turpentine, etc.?

• cycads

• ginkgoes

• conifers

• gnetophytes

Which of the following is not a gymnosperm?

• cycads

• ginkgoes

• conifers

• roses

Conifers have all of the following characteristics except?

• conifers have recessed stomatal opening

• conifers have needle-like leaves in clusters of two to five per bundle

• the gametophyte generation is the most conspicuous generation

• all conifers are heterosporous.

This type of plant is characterized by “naked seeds” and lacking in flowers and fruit.

• Angiosperm

• Gymnosperm

• Anthophyta

• Pterophytes

Pines, spruces and firs belong to this group of plants.

• Coniferophytes

• Cycadophytes

• Gnetophytes

• Ginkgophytes

The success of the evolution of the seed is due to?

• protection of embryo

• endosperm as food for embryo

• lie dormant in harsh environments

• all of the above

Tags

NGSS.HS-LS4-5