Lecture 9: Plant Diversity II

Question 1

SDT of Seed Plants

Answer 1

1. Seeds
2. Reduced Gametophyte(n)
3. Heterospory
4. Ovules
5. Pollen

Question 2

Advantages of Seeds

Answer 2

-protects the embryo
-food source for offspring=endosperm

Question 3

Reduced Gametophyte

Answer 3

-microscopic
-dependent from sporophyte
-tucked with sporangia

Question 4

Heterospory

Answer 4

-can be either male or female
-microsporangium
-megasporangium

Question 5

Microsporangium(2n)

Answer 5

-produces microspores(n)
-male
-sperm(pollen) in antheridia

Question 6

Megasporangium

Answer 6

-produces megaspores(n)
-female
-egg(ovule) in archegamia

Question 7

Ovules

Answer 7

-production of eggs
-develops from megaspore
-female gametophyte

Question 8

Pollen grain

Answer 8

-male gametophyte within sporopollenin
-sperm develops microspore
male pollen–>female part of plant

Question 9

Angiosperm specialized structures

Answer 9

-flowers: modified leaves, sepals, and petals
-male part: stamen and anther
-female part: carpel and ovaries with ovules inside

Question 10

Pollination

Answer 10

moves from anther to carpel

Question 11

Fertilization

Answer 11

1. Tube grows from tube cell into ovary
2. Two sperm travel to female gametophyte

Question 12

Double fertilization

Answer 12

-results in zygote(2n) and endosperm
-done only in angiosperms
-two sperm passed from pollen to ovule