Flower Lab

Question 1

flowers are a modified form or which organ?

Answer 1

leaves

Question 2

how are wind-pollinated flowers modified?

Answer 2

large floppy stamens with feathery stigma, usually not much resource goes into sepals or flowers

Question 3

how are animal-pollinated flowers modified?

Answer 3

attraction to animals, such as nectar glands, large receptacles for landing, sturdy tubular structures for hummingbird beaks

Question 4

what are the four basic flower parts?

Answer 4

1. sepals
2. petals
3. pistil
4. stamens

Question 5

what is the function of the sepals?

Answer 5

typically Ps and protection of delicate petals

Question 6

what is the function of the petals?

Answer 6

provide landing and attraction to animal pollinators

Question 7

what is the function of the pistil?

Answer 7

produce the ovule

Question 8

what is the function of the stamens?

Answer 8

pollen-bearing (produce sperm)

Question 9

what is the receptacle?

Answer 9

location of flower stalk where the flower parts are attached

Question 10

what is the peduncle?

Answer 10

the stem of a flower

Question 11

what are complete flowers?

Answer 11

flowers with four main flower parts

Question 12

what are incomplete flowers?

Answer 12

flowers that do not have all the four main flower parts

Question 13

what are perfect flowers?

Answer 13

flowers with both male and female reproductive organs

Question 14

what are imperfect flowers?

Answer 14

flowers that do not have both male and female reproductive organs

Question 15

what is an advanatge of imperfect flowers? Why is it an advantage?

Answer 15

increase probability of outcrossing because they cannot self-pollinate. This increases genetic diversity

Question 16

monocots have flower parts in multiples of

Answer 16

3’s

Question 17

dicots have flower parts in multiples of

Answer 17

4’s or 5’s

Question 18

what does the perianth consist of?

Answer 18

sepals and petals

Question 19

what structural features of sepals help their function of protection?

Answer 19

1. sclerenchyma

2. waxy cuticle

Question 20

what is a hypanthium?

Answer 20

perianth fused into tube part way up, stamen filaments are sometimes included

Question 21

what is the structure of stamens?

Answer 21

filaments holding pair of anther sacs

Question 22

how are the anther sacs of wind-pollinated flowers attached to filaments?

Answer 22

at a single point

Question 23

how are the anther sacs of animal-pollinated flowers attached to filaments?

Answer 23

along their length

Question 24

what are the three parts of the pistil?

Answer 24

1. ovary
2. style
3. stigma

Question 25

what is the only part of the flower that is receptive to pollen?

Answer 25

stigma

Question 26

what is a hypogynous flower? What ovary type is it?

Answer 26

other flower parts attach below the ovary. Superior ovary

Question 27

what is an epigyous flower? What ovary type is it?

Answer 27

other flower parts attach above ovary. Inferior ovary

Question 28

what is a perigynous flower? What is the ovary type?

Answer 28

perianth and stamens appear to attach above the ovary, but form a hypanthium that attaches below. 1/2 inferior ovary

Question 29

what two cells are contained in the pollen grain?

Answer 29

1. tube cell | 2. generative cell

Question 30

what is the function of the tube cell?

Answer 30

controls development of pollen tube, which penetrates and digests through stigma and style to ovule

Question 31

what is the name of the opening in an ovule?

Answer 31

micropyle

Question 32

what is the function of the generative cell?

Answer 32

follow tube cell down the tube, divide into two nuclei, one to fuse withegg to form diplod zygote, and other to fuse with diplod nucleus to form triploid endosperm

Question 33

what is the K?

Answer 33

calyx, number of sepals

Question 34

what is the C?

Answer 34

corolla, number of petals

Question 35

what is the A?

Answer 35

androecium, number of stamens

Question 36

what is the G?

Answer 36

gynoecium, number of carpels in ovary

Question 37

what do brackets indicate in the floral formula?

Answer 37

fusion

Question 38

how would you represent anthers fused into a ring in the floral formula?

Answer 38

curved line over the number of stamens

Question 39

how is a hypanthium represented in the floral formula?

Answer 39

curved line underneath from K to A

Question 40

how is an epigynous flower represented in the floral formula?

Answer 40

a hat above the G

Question 41

what is regular floral symmetry, and what is the other name for it?

Answer 41

radial. Actinomorphic

Question 42

what is irregular floral symmetry, and what is the other name for it?

Answer 42

bilateral. Zygomorphic

Question 43

in some cultivars, the petals are actually

Answer 43

petaloid stamens