Chapter 21 Flashcards Preview

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Flashcards in Chapter 21 Deck (23):
1

Biologists describe plants as:

Multicellular eukaryotes with tissues and organs.

2

Earth is ______________ years old (bya)

4.6 billion

3

One characteristic of green algae:

It is photosynthetic (optional)

4

• Land plants developed adaptations to survive terrestrial environments: (examples)

• cuticles

• stomata

• vascular tissues

• seeds

5

Is a waxy coating on the outer surface of plant cells.

A cuticle.

6

Are small openings/pores that allow gas exchange.

Stomata.

7

They are specialized transport tissues, and move substances into and out of cells. (also from cell to cell)

Vascular Tissues.

8

They are usually larger and taller than nonvascular plants.

Vascular plants.

9

They lack transport tissues, move water from cell to cell using diffusion and osmosis.

Nonvascular plants

10

Examples of vascular plants:

Trees, grasses, ferns, flowering plants.

11

Examples of nonvascular plants:

Mosses, liveworts, hornworts.

12

Plants produce _______ or ________ in order to reproduce.

Spores and seeds.

13

They contain a single cell capable of producing and organism.

Spores.

14

They contain an embryo and nutrients to feed that embryo, and are covered with a protective layer.

Seeds.

15

An alternation of generations-two stages (two generations), the gametophyte and sporophyte generation.

Life Cycle.

16

It is a generation that produces gametes (sperm and eggs).

Gametophyte generation.

17

What are the haploid cells?

Have half the number of chromosomes-DNA in the form of genes.

18

• when a sperm fertilizes an egg, a _______ is formed.

Zygote (2n)

19

Is the very first cell that’s a combination pf the parents’ DNA of two gametes’.

A zygote.

20

A zygote forms a:

Sporopyte Generation (2n).

21

Plant division:

Nonvascular

(mosses, hornworts, liveworts)

Bryophytes, Anthocerophytes, Hepaticophytes.

22

Plant Division:

Vascular, Seedless:

(club mosses, ferns and horsetails)

Lycophytes, Pterophytes.

23

Plant Division:

Vascular, Seed - producing:

(cycads or sago palms, joint firs, ginkgoes, pines, flowering plants)

Cycadophytes, Gnetophytes, Ginkgophytes, Coniferophytes, Anthophytes.