lecture 3

Question 1

flowers are composed of _ whorls

Answer 1

4

Question 2

what are the megasporophylls of angiosperms

Answer 2

carpels

Question 3

what are the microsporophylls of angiosperms

Answer 3

stamens

Question 4

what are the 4 whorls attached by

Answer 4

receptacle

Question 5

what makes a flower imperfect

Answer 5

has either only stamens or only carpels, not both like a perfect flower

Question 6

what is inflorescences

Answer 6

the arrangement of a cluster of flowers on a floral axis

Question 7

what is sporogenesis. is it development by mitosis or meiosis

Answer 7

development of mega/micro haploid spores via MEIOSIS

Question 8

what is gametogenesis? is it development by mitosis or meiosis?

Answer 8

development of the gametes via MITOSIS

Question 9

each microspore undergoes mitosis to produce 2 cells;

Answer 9

1. generative cell
2. tube cell

Question 10

what does the generative cell produce

Answer 10

will undergo mitosis to produce 2 sperm during pollinationwh

Question 11

at does the tube cell produce

Answer 11

will produce the pollen tube for fertilization

Question 12

the megasporocyte (2N) undergoes _______, producing __ megaspores, only __ survive(s)

Answer 12

meiosis, 4, 1

Question 13

what plant hormone determines the fate of each cell in the female gametophyte

Answer 13

auxin

Question 14

spores are produced by which type of division

Answer 14

meiosis

Question 15

what is the triploid nucleus

Answer 15

the 3N endosperm

Question 16

the first mitotic division of the zygote splits the fertilized egg into:

Answer 16

a basal cell and a terminal cell

Question 17

what is the role of the basal cell

Answer 17

produces a thread of cells called the suspensor, which anchors the embryo to parent plant and transfers nutrients

Question 18

what is the role of the terminal cell

Answer 18

divides several times and forms a spherical proembryo (early embryo) attached to the suspensor

Question 19

what will produce the shoots and roots after germination

Answer 19

the shoot apex and root apex

Question 20

what is the water content in a seed that has been dehydrated

Answer 20

5-15%

Question 21

what is the coleoptile?

Answer 21

protective sheath surrounding the shoot

Question 22

what is the coleorhiza?

Answer 22

protective sheath surrounding the root

Question 23

simple fruit are defined as :

Answer 23

being derived from a single or several fused carpels (EX:PEA)

Question 24

aggregate fruits are defined as:

Answer 24

from a single flower, with each carpel forming a fruit (EX: RASPBERRIES)

Question 25

multiple fruits are defined as:

Answer 25

developing from a cluster of flowers that fuse together (EX: PINEAPPLE)

Question 26

accessory fruits are defined as:

Answer 26

fruit formed from other floral parts that are not the carpels (EX: APPLES AND STRAWBERRIES)