Chapter 38.1

Question 1

Fertilization

Gametophytes produce haploid gametes (n) by mitosis

Answer 1

fertilization of gametes produces a sporophyte

Question 2

Receptacle

Answer 2

Flowers are the reproductive shoots of the angiosperm sporophyte; they attach to a part of the stem called the receptacle

Question 3

Four Floral Organs:

Sepal

Answer 3

male reproductive structure

Question 4

Four Floral Organs:

Petals

Question 5

Four Floral Organs:

Stamen

Question 6

Four Floral Organs:

Carpel

Answer 6

female reproductive structure

Question 7

Anther

Question 8

Style

Question 9

Stigma

Question 10

Plant:

Ovary

Question 11

Pistil

Answer 11

A single carpel or group of fused carpels

Question 12

Complete Flowers

Answer 12

Complete flowers contain all four floral organs

Question 13

Incomplete Flowers

Answer 13

Incomplete flowers lack one or more floral organs, for example stamens or carpels

Question 14

Inflorescences

Answer 14

Clusters of flowers

Question 15

Microspores

Answer 15

Pollen develops from microspores within the microsporangia, or pollen sacs, of anthers

Question 16

Pollen Grain

Question 17

Pollen Tube

Question 18

Embryo Sac

Answer 18

The embryo sac, or female gametophyte, develops within the ovule

Question 19

Megaspores

Answer 19

One cell in the megasporangium undergoes meiosis, producing four megaspores, only one of which survives

Question 20

Pollination

Answer 20

transfer of pollen from an anther to a stigma

Question 21

Coevolution

Answer 21

Coevolution is the evolution of interacting species in response to changes in each other

Question 22

Double Fertilization

Answer 22

discharge of two sperm from the pollen tube into the embryo sac

Question 23

Endosperm

Answer 23

One sperm fertilizes the egg, and the other combines with the polar nuclei, giving rise to the triploid food-storing endosperm (3n)

Question 24

Seed Coat

Question 25

Hypocotyl

Answer 25

Below the cotyledons the embryonic axis is called the hypocotyl and

it terminates in the radicle (embryonic root);

Question 26

Epicotyl

Answer 26

Above the cotyledons, it is called the epicotyl

Question 27

Radicle

Question 28

Coleoptile

Answer 28

Two sheathes enclose the embryo of a grass seed: a coleoptile covering the young shoot and a coleorhiza covering the young root

Question 29

Coleorhiza

Question 30

Imhibition

Answer 30

Germination depends on imbibition, the uptake of water due to low water potential of the dry seed

Question 31

Fruit

Answer 31

A fruit develops from the ovary