Plantae - Parts of angiosperms

Question 1

flower

Answer 1

• sexual structure

- where pollination occurs

Question 2

anther

Answer 2

-sac where pollen is produced

Question 3

petal

Answer 3

-attracts pollinators with bright colours

Question 4

stigma

Answer 4

-pollen receiving site

Question 5

ovary

Answer 5

-female sexual organ

Question 6

style

Answer 6

-connects pollen (sperm) to ovary for fertilization

Question 7

ovule

Answer 7

-unfertilized seed

Question 8

pollen grains

Answer 8

• sperm
• gametophyte
• one pollen grain = two sperm cells

Question 9

stamen

Answer 9

-produces microspores that become pollen grains

Question 10

pistil

Answer 10

-produces ovules

Question 11

What is inside an ovule?

Answer 11

• one haploid egg (gametophyte)

- one diploid polar cell (sporophyte)

Question 12

How does pollen reach the ovule?

Answer 12

• pollen first is transferred via stigma

- pollen tube grows down from style to ovule

Question 13

What type of fertilization do angiosperms do and why?

Answer 13

• double fertilization

- second fertilization forms fruit that protects seed

Question 14

What are the two parts of double fertilization?

Answer 14

• one sperm fertilizes egg to make zygote (diploid)

- one sperm fertilizes polar cell to make endosperm (triploid)

Question 15

What do the endosperm and zygote do together?

Answer 15

-fuse to become seed (sporophyte)