Lecture 18: Angiosperms

Question 1

what are angiosperms?

Answer 1

seed plants with fruit and flowers

Question 2

____ have one embryonic leaf, ____ have two embryonic leaves

Answer 2

1. monocots
2. eudicots

Question 3

why are angiosperms so diverse? i.e lots of fertilization?

Answer 3

because theres a reward! production og fruit

Question 4

_____ are specialized shoots with modified leaves

Answer 4

flowers

Question 5

____ enclose flower

Answer 5

sepal

Question 6

___ attract pollinators (flower)

Answer 6

petals

Question 7

___ produce pollen (flower)

Answer 7

stamen

Question 8

____ produce ovules

Answer 8

carpels

Question 9

what are the components of a carpel?

Answer 9

ovary, style, stigma

Question 10

what is the main function of an ovary in a carpel?

Answer 10

to protect ovule, where fertilization occurs

Question 11

what is the main function of a style in a carpel?

Answer 11

elevates stigma

Question 12

what is the main function of a stigma?

Answer 12

where pollen is received (also releases sugar)

Question 13

what does a stamen consist of?

Answer 13

filament and anther (where pollen is produced)

Question 14

____ is formed when ovary wall thickens and matures (can be dry/fleshy)

Answer 14

fruit

Question 15

what is the function for fruit?

Answer 15

protect seeds, aid in dispersal of seeds

Question 16

____ has two haploid sperm nuclei

Answer 16

pollen grain

Question 17

heterosporous, sporophyte flowers are male & female; are both traits of the _____

Answer 17

angiosperm lifecycle

Question 18

_____ occurs when pollen tube discharges two sperm into female gametophyte within an ovule

Answer 18

double fertilization

Question 19

what are the two main cells in a female gametophyte (angiosperm)?

Answer 19

central cell, egg

Question 20

in double fertilization, one sperm _____ and the other combines with _____ to develop _____

Answer 20

1. fertilizes egg
2. two nuclei in central cell
3. endosperm

Question 21

a triploid endosperm nourishes ____

Answer 21

nourishes developing embryo

Question 22

within a seed, an embryo consists of _____

Answer 22

root and two cotyledons (embryonic leaves)