Phylum Bryophyta

Question 0

What are the 3 classes of mosses?

Answer 0

1. Class sphagnopsida
   > sphagnum peat moss
2. Class andreaaopsida
   > granite / rock moss
3. Class bryopsida
   > true mosses

Question 1

Other name or common name of phylum Bryophyta?

Answer 1

Mosses

Question 2

Examples of class andreaeopsida?

Answer 2

Andreae

Neuroloma

Question 3

Examples of bryopsida

Answer 3

Atrichum
Bryum
Buxbaunia

Question 4

Gametophyte is consist of…

Answer 4

1. Rhizoids: anchorage & absorption
2. Stipe: stem-like ; parenchymatous & chlorophyllous
3. Blades: leaf-like with costa (midrib)
   Unistratose (one cell thick)
   No stomata

Question 5

Parts of stipe

Answer 5

1. Epidermis
2. Cortex
3. Stele
   > hydroids (water conducting)
   > leptoids (food conducting)
   > steroids (supporting cells)

Question 6

What is capillary action?

Answer 6

Water is conducted along the exterior of the plant when it lacks hydroids and leptoids

Question 7

Network of branched cells

Answer 7

Protonema

• w numerous small chloroplast in each cell

Question 8

Gametophyte

Answer 8

• oogamous: eggs are bigger + smaller sperm cells

- dioecious: bears either archegonia and antheridia

Question 9

Antheridium

Answer 9

• male sex organ

- microgametangia

Question 10

Archegonium

Answer 10

• female sex organs
• megagametangia
• vase shaped with long neck

Question 11

Parts of mature sporophyte ( w stomata)

Answer 11

1. Foot: absorbs sugar and water for G
2. Seta: stalk
3. Capsule: apical sporangium

Question 12

Parts of capsule

Answer 12

1. Calyptra: remnants of the neck of archegonium
   looks like a witch hat
2. Operculum: when calyptra is removed
3. Peristome: tooth like
   Responds to humidity
   > bending outward and opening the sporangium when air is dry
   > bending inward and trapping spores when air is humid