Thought Questions 15. a. How are the gametophytes of mosses and flowering plants

Question

Thought Questions 15. a. How are the gametophytes of mosses and flowering plants different from one another? b. How are the gametophytes of mosses and flowering plants similar to one another? hy do pines produce clusters of pollen cones, and why are the pollen cones located at the tips of branches instead of closer to the trunk of the tree? 17. Angiosperm means "covered seed." What covers the seeds of angiosperms, and what role does this covering have in ensuring the success of the embryos in the seeds? 194 Laboratory 15 Seed Plants 15-14

Explanation / Answer

ANS 15 a) Difference: Mosses are nonvascular plants; ferns are vascular. Gametophyte is the dominant generation in mosses; sporophyte is dominant generation in ferns. Mosses have separate male and female gametophytes; fern gametophytes have male and female parts on same plant.

ANS 15 b) Simmilarities: Alternation of generations (sporophyte and gametophyte) and they don't make seeds

--------------------------------------------------------------------------------------------------------------------------------------------------------

ANS 16) The pine cone ovule has an open quit known as a micorpyle which incorporates the sperm from the pollen to the egg. the small male cones grow in clusters and have pollen-producing chambers which release pollen into the air. the problem is a way to get pollen from the male cones to the micropyle of the female cones by way of wind alone.
Female cones develop from the ends of branches and pine needles that trade, grow, specialize and harden to form scales.the pine cone ovule has an open stop called a micorpyle which contains the sperm from the pollen to the egg. the small male cones develop in clusters and feature pollen-generating chambers which launch pollen into the air and so the pollen cones are located at the tips of branches instead of closer to the trunk of the tree.

---------------------------------------------------------------------------------------------------------------------------------------------------------

ANS 17) The closed carpel of angiosperms additionally permits adaptations to specialised pollination syndromes and controls. this allows to prevent self-fertilization, thereby keeping multiplied diversity. once the ovary is fertilized, the carpel and some surrounding tissues turn into a fruit. this fruit regularly serves as an attractant to seed-dispersing animals. the ensuing cooperative courting presents any other advantage to angiosperms within the manner of dispersal.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.