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Flashcards in Test 2 Deck (62)
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1

The marine algae are popularly known as _.
What is the more appropriate name?

Seaweeds
Macrophytes

2

Classification of seaweeds is based on

Pigment
Food storage products

3

What do seaweeds lack compared to higher plants?

Complex structures and reproductive mechanisms

4

S.W on rocky shores at low tide are _ and _ to withstand _ _.

small; sturdy; waveshock

5

Kelps found offshore in cold waters are _ _ that form _ _ _.

true giants; dense underwater forests

6

Seaweeds lack true _, _ and _.

Leaves, stems; roots

7

Complete body name

Thallus

8

Leaf-like, flattened portions of the thallus are known as _.

Blades

9

What makes blades important?

Increase surface area and are the main photosynthetic regions.

10

Blades are sometimes kept close to the sea surface by means of gas-filled _.
Why?

Pneumatocysts
To maximize exposure to sunlight

11

Stem-like structure on seaweeds

Stipe (from which the blades originate)

12

Anchors thallus

Holdfast

13

Most are freshwater, 10% are marine

Green algae

14

Pigments of green algae?
Food storage product?
Same as higher land plants

Chlorophyl a,b and carotenoids
Starch

15

Algae that has predominance of yellow pigments a and c

Brown

16

Brown algae charcteristics

Most dominant primary producers on temperate and polar rocky coasts; most complex and largest
Can withstand exposure to air

17

Brown algae characteristics p.2

Blades up to 3m in length, harvested for food. Blades may be single or split or branch. several blades may grow from a single holdfast

18

Brown algae characteristics p.3

largest kelps are found in deeper water below the lowest tide level
Bullwhip kelp, nereocystis, long whip-like stipe of 30m.
Pelagophycus has antler-like branches

19

Largest kelp

Macrocystis

20

Macrocystis _: Several long stipes grow from the _, from which _ _ develop.

Pyrifera; holdfast, elongate, blades

21

Many plants, each with many fast-growing and intertwined stipes, form dense and very productive _ _ or _ _

kelp beds; kelp forests

22

Algae that has more species of marine

Red algae

23

Examples of Red algae

Porphyra; carrageenan; agar

24

Coralline red algae

Deposit calcium carbonate around cell walls;

25

Some coralline red algae grow as _ or _ on rock. Warm water species _ coral reef debris together in the formation of _ _.

smooth; encrusting; cementing; coral reef

26

Reproduction of seaweeds: Sexual and asexual means; alternation of generations...

Haploid gametophyte and a diploid sporophyte

27

Asexual

fragments of the thallus may grow into new individuals (Sargassum)

28

_ _ divides by _ -- haploid _ -- into _ _ --- produces _ _.

diploid sporophyte, meiosis, spores, haploid gametophyte, haploid gametes.

29

Truly marine flowering plants; rarely exposed by low tide, submerged by seawater; not true grass, closest relative - lily

Seagrasses

30

Seagrasses have no need to attract insect pollinators because their _ and _ are _.

pollen and tiny seeds; distributed by water and in the feces of herbivorous fish and invertebrae.