Platyhelminthes

Question 1

Properties

Answer 1

1) aka flatworms
2) dorso ventrally flattened body

Question 2

Habitat

Answer 2

Aquatic and terrestrial,
Can be terrestrial
Can be free living (non parasite. Ex- Dugesia (planaria))
Or Parasite (depends on host)
Mostly endoparasite in some animals (ex- Fasciola, Taenia)

Question 3

LOO

Answer 3

Organ

Question 4

GL

Answer 4

Triploblastic

Question 5

BP

Answer 5

Blind sac

Question 6

Symmetry

Answer 6

Bilateral

Question 7

COELOM

Answer 7

Acoelomate

Question 8

NOTOCHORD

METAMERISM

Answer 8

No

No

Question 9

Parasitic Adaptation (special property)

Answer 9

1) HOOK AND SUCKERS
some have this on their body to attach themselves to host and absorb nutrients

2) THICK TEGUMENT
thick body wall to protect from digestive enzymes of host

3) Some can directly absorb nutrients through body surface

Question 10

DS

Answer 10

Incomplete DS

Question 11

RS

ES

Answer 11

NO

NO

Question 12

ES

Answer 12

Flame cells

Question 13

Reproduction

Answer 13

Bisexual

Question 14

Fertilization

Answer 14

Internal

Question 15

Development

Answer 15

Indirect (many larval stage)

Question 16

EXAMPLES

Answer 16

1) Taenia (tapeworm and needs human host)
2) Fasciola (liver fluke and parasite)
3) Dugesia (planaria with high regeneration)