Lecture 3 part 2 Plant diversity lower land plants Flashcards Preview

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Flashcards in Lecture 3 part 2 Plant diversity lower land plants Deck (87)
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1

How are green land plants defined?

Cell structure & biochemistry

–Degree of vegetative complexity

–Type of life cycle

–Degree of complexity of their reproductive structures

2

What is the basic cell structure?

eukaryotic

3

What are the Chloroplast pgiments?

mainly chlorophylls & some carotenoids

4

What is the cell wall made out of?

made of cellulose

5

What is the typical storage material?

starch

6

What kind of flagella do Motile cells (Male gametes) have?

whiplash flagella

7

What growing points define Growth

–Called meristems

–Continue to divide indefinitely

–Plant body differentiates from the maturing daughter cells as the meristem grows away

8

Plant body shows differentiation into?

leaves & stems

9

What do some plant bodies lack?

Some lack this & body is flat & lobed

•Thallus

10

What does Elongated outgrowths increase?

the surface area in contact with the substrate (root hairs or rhizoids)

11

What phases do plants alternate between?

haploid phase

diploid phase

12

What is Haploid phase?

single set of chromosomes

13

What is diploid phase?

each nucleus contains 2 complete sets of chromosomes

14

What is the process that leads to the plant phase alternation?

fusion of gametes and meiosis.

15

What are gametes?

haploid unicellular reproductive bodies which fuse in pairs to form a diploid cell called a zygote

16

In most simple algae the vegetative plant is?

haploid

17

in most simple Algae the Zygote is?

diploid phase

18

For most animals the organism's chromosomes are?

diploid & the gametes are haploid

19

What types of organism have an alternation of generations?

In advanced algae & all land plants

20

What are both haploid and diploid phases represented by?

distinctive vegetative organisms

21

What are the two distinct types of plants species consist of?

one haploid & one diploid

22

What is the order of the plant life cycle?

Haploid phase (Gametophyte) -> Fusion of gametes -> Diploid phase (sporophyte) -> Meiosis. Then back to Haploid phase

23

What is the order of the generalised life cycle of lower male land plants?

Multicellular vegetative haploid plant (gametophyte) -> Male sex organ(gametangium) -> antherozoids -> FUSION -> Zygote -> Multicellular vegetative diploid plant(sporophyte) -> Sporangium -> MEIOSIS -> SPORES

24

What is the order of the generalised life cycle of lower female land plants?

Multicellular vegetative haploid plant (gametophyte) -> Female sex organ (gametangium) -> egg -> FUSION -> Zygote -> Multicellular vegetative diploid plant(sporophyte) -> Sporangium -> MEIOSIS -> SPORES

25

How do haploid plants give rise to the diploid?

producing gametes–Called a gametophyte

26

These fuse in pairs to form a?

zygote

27

What does a zygote grow to form?

a diploid plant

28

What are the 2 kinds of gametes in all land plants?

–Male (small & motile)

–Female (large & non-motile)

29

What are the structure which give rise to gametes?

gametangia

30

Outline the main features of a diploid plant

-produces reproductive cells

–By meiosis

–Each grows to form a haploid plant without any fusion of pairs

–Unicellular propagule – called a spore

–Diploid plant is known as the sporophyte

•Spores are produced in a sporangium