DRAW IT Use the letters a–d to label where on the phylogenetic tree each of the following derived characters appears. a. flowersb. embryosc. seedsd. vascular tissue

Which of the following structures produce eggs and sperm? (Explain your answer.)a. fern sporophytesb. moss gametophytesc. the anthers of a flowerd. moss sporangia

Gymnosperms and angiosperms have the following in common excepta. seeds.b. pollen.c. ovaries.d. ovules.

The eggs of seed plants are fertilized within ovules, and the ovules then develop intoa. seeds.b. spores.c. fruit.d. sporophytes.

The diploid sporophyte stage is dominant in the life cycles of all of the following excepta pine tree.a rose bush.a fern.a moss.

Which of the following terms includes all the others?a. angiospermb. gymnospermc. vascular plantd. ferne. seed plant

Explain the difference between homosporous and heterosporous plants. Where are the microsporangium and megasporangium found in a tulip? What happens to the spores that are produced by these structures?

Explain the difference between homosporous and heterosporous plants. Where are the microsporangium and megasporangium found in a tulip? What happens to the spores that are produced by these structures?

Steroid hormones, like most lipid-soluble signaling molecules, are processed directly. How does the absence of a signal transduction cascade in the processing of steroid hormones affect the cellular response that is possible?