Plant kingdom bryophyta

Question 1

What is the tagline?

Answer 1

Haploid ,Thalloid ,autotrophic ,with embryo

Question 2

what are sciophytes

Answer 2

living in damp,cool and shady places

Question 3

who is the amphibian of plant kingdom?

Answer 3

bryophyta

Question 4

what is special about bryophyta?

Answer 4

• with embryo (embryophytes)

- First land plant w/o vascular system

Question 5

why do they need water?

Answer 5

for sexual reproduction

Question 6

what type of thallus do bryophyta have?

Answer 6

• advanced than algae

- no true roots,stem and leaves.Root like rhizoids and leaf and stem like structures present.

Question 7

describe the dorsal side of riccia .

Answer 7

• green and photosynthetic
• dichotomy : branching in thallus
• median grove

Question 8

what is dichotomy in riccia?

Answer 8

branching of thallus

Question 9

describe the ventral side of riccia.

Answer 9

• spines to protect the edge of thallus (yellow to orange)

- root like structure which are not deploid

Question 10

what are the two types of rhizoid in riccia?

Answer 10

smooth walled - smooth cell membrane

constricted walled - constricted cell membrane

Question 11

describe vertical transverse section in riccia

Answer 11

deposition of water in median grove where the sex organs are present

Question 12

what is the male sex organ called?ploydy? in riccia

Answer 12

antheridium (n)

Question 13

what are the cells of antheridium called in riccia?

Answer 13

androgonial cells / amdrocytes.

Question 14

what are male gametes called and how are they formed? describe structure as well.

Answer 14

antherozoides are formed by the mitosis of androgonial cells. coiled and biflaggleted.

Question 15

What is the female sex organ called?

Answer 15

archigonium

Question 16

what are the types of cell in archigonium?

Answer 16

• 4 cover cells
• neck canal cells
• ventral canal cells
• egg cell
• single jacket layer of cell

Question 17

In Marchatia what is the antheridia bearing structure called ?

Answer 17

antheridiophore

Question 18

higher branching of thallus is present in marchantia or riccia?

Answer 18

marchantia

Question 19

what bears the group of archigonia ?

Answer 19

archigoniophore

Question 20

What are gemma cells ?

describe the structure of gemma cup

Answer 20

large size disc or s shaped asexual bud fo rasexula reproduction

Question 21

what is special about the sex organs of bryophyta

Answer 21

• multicellular and jacketed.first time in plant kingdom.

- generally monoecious exception marchatia