Lab 5

Question 1

What consists of Class Bryidae and what phylum does it belong to?

Answer 1

True mosses, belongs to phylum Bryophyta

Question 2

Describe key features of Class Bryidae

Answer 2

-have peristome
-long seta
-no pseudopodium

Question 3

Life cycle of true mosses

Answer 3

spore -> young gametophyte -> mature gametophyte -> archegonia & antheridia development -> sperm swims to archegonia from antheridium -> sperm gets fertilized -> zygote forms -> young sporophyte grows from zygote attached to gametophyte -> sporophyte produces spores by meiosis -> spores are released

Question 4

What is Class Sphagnidae and describe key features

Answer 4

Peat moss
-grows in bogs
-short seta
-no peristome
-pseudopodium is part of gametophyte

Question 5

Class Andreaeidae

Answer 5

Granite moss
-grow in mountainous/arctic regions
-lack peristome
-lack operculum

Question 6

What is the protonema

Answer 6

The early gametophyte

Question 7

Hyaline cells

Answer 7

Aid in water retention and gas exchange