Ch. 32 Flower and Fruit

Question 1

stamen

Answer 1

male

Question 2

carpel

Answer 2

female

Question 3

flowers

Answer 3

reproductive shoots of the angiosperm sporophyte

attach to the part of the stem called the receptacle

Question 4

inflorescenses

Answer 4

clusters of flowers

Question 5

male gametophyte (sperm)

Answer 5

develops in the anther and is called the microsporangium

Question 6

microspores develop within the

Answer 6

microsporangium (pollen sacs) into pollen grains

Question 7

pollen grains contain two cells

Answer 7

a pollen tube cell which forms the pollen tube and the generative cell migrates to the ovary, dividing and forming two male gametes (sperm) during the process

Question 8

Development of the female gametophyte occurs in two stages

Answer 8

stage 1: megasporeogenesis

stage 2: megagametogenesis

Question 9

megasporeogenesis

Answer 9

single cell in the megasporangium (2n), an area in the ovule, located in the ovaries, undergoes meiosis
4 develop, 1 survives

Question 10

megagametogenesis

Answer 10

the megaspore (n) undergoes mitosis producing an 8 nucleate, 7 cell megagametophyte (embryo sac) 
the 2 polar nuclei move to the equator and fuse, forming a single diploid cell, later becoming endosperm after fertilization

Question 11

pollination in angiosperms

Answer 11

pollen from anther and stigma

Question 12

double fertilization

Answer 12

occurs when discharge of two sperm from the pollen tube to the embryo sac
1 sperm fertilizes the egg and the other combines with the polar nuclei giving rise to the triploid food storing endosperm (3n)

Question 13

double fertilization

Answer 13

follows each ovule developing into a seed

ovary develops into fruit enclosing the seeds

Question 14

endosperm stores

Answer 14

nutrients that can be used by seedling

most monocots and some eudicots

Question 15

in other eudicots the food reserves of the endosperm are

Answer 15

exported to the cotyledons

Question 16

germination depends on

Answer 16

imbibition (uptake of water due to low water potential of the dry seed)

Question 17

fruits are classified by their

Answer 17

developmental origins

Question 18

simple

Answer 18

single or several fused carpels (pea)

Question 19

aggregate

Answer 19

from single flower with multiple seperate carpels

raspberry

Question 20

multiple

Answer 20

from group of flowers/ inflorescense (pineapple)

Question 21

accessory

Answer 21

fruit contains other floral parts in addition to ovaries (apple)