Rhodophyta (Red ALGAE)

Question 1

Habitat

Answer 1

Few Freshwater
Mostly Marine

Question 2

Holdfast

Answer 2

Anchorage structure found at the base of red algae

Question 3

Pigmentation

Answer 3

Chlorophyll
Phycobilins
Phycoerythrin (red pigment)
Phycocyanin (blue pigment)

Question 4

Cell Wall Components

Answer 4

Polysaccharides

Question 5

Economical Uses

Answer 5

Pharmaceutical & Industrial applications (Agar)- culture preparation ingredient

Carrageenan

Chocolate seaweed pudding

Nori (sushi seaweed)

Question 6

Storage products

Answer 6

Floridean Starch

Question 7

Pit Plugs

Answer 7

a membrane line pore in the center of the new wall; filled with a homogenous proteinaceous matrix.

cell to cell connection (Plasmodesmatas)

Question 8

Rhodomorphin

Answer 8

a hormone substance that promotes cell growth and repair of cells

Question 9

Unicellular Examples

Answer 9

Porphyridium

Question 10

Uniseriate Examples

Answer 10

Callithamnion

Question 11

Multiseriate Algae Example

Answer 11

Polysiphonia

Question 12

Pseudoparenchyma Example

Answer 12

Porphyra

Question 13

Coralline Algae Example

Answer 13

Lithothamnion
Corallina

Question 14

Asexual Reproduction in Red Algae is by..?

Answer 14

• Binary Fission
• Monospores

Question 15

Does Rhodophyta produce motile cells?

Answer 15

No

Question 16

Life Cycle Type

Answer 16

Triphasic Life Cycle

1. haploid gametophyte
2. diploid carposporophyte ( dependent on female gametophyte)
3. Independent diploid sporophyte [tetrasporophyte])

Question 17

Stages of Sexual Reproduction Triphasic

Answer 17

Isomorphic Gametophyte generation (n)
Sporophyte Generation (2n)
Carposporophyte Generation (2n)

Question 18

Tetraspores

Answer 18

four meiospores that are produced in each sporangium

Question 19

Carpogonia

Answer 19

eggs produced in the gametophyte of a red algae

Question 20

Trichogyne

Answer 20

elongated hair like extension found on each carpogonia

Question 21

Crystocarp

Answer 21

cup-like envelop around the carposporophyte

Question 22

Rhodophyta Sexual Life Cycle

Answer 22

Alternation of Generations
Heteromorphic
Triphasic

Question 23

Keystone Species

Answer 23

Organisms that plays a vital role in an ecosystem.

Question 24

Rhodolith

Answer 24

unattached calcareous nodules composed of crustose, benthic marine red algae that resemble coral.

Coralline red algae- photosynthesizers, calcifiers and ecosystem engineers

Question 25

Belizean Seaweed Example

Answer 25

Eucheuma isiforme