#Test 3# Lesson -Animal kingdom Topic ~Hydra (from colelenterata /Cnidaria phylum) [ Neet /Aiims) (with Answer key) - Class 12 PDF Download

1)Which is fresh water cnidarian ?
A)  Hydra
B) Spongilla
C) Dugesia
D) None of the above

2) The name Hydra was given by
A) Eilis
B) Aristotle
C) Linnaeus
D) Reaumur

3) The oral cone of Hydra is called
A) Manubrium
B) Mouth
C) Osculum
D) Ostium

4) the number of tentacles in hydra are
A) 6 to 10
B)10 to 16
C) 16 to 20
D) 20to26

5)hydra is Immortal because
A.)old cells are replaced by new cell
B) cells do not grow old
C) of regeneration
D)the it never dies

6)what will happen if the cnidocil is touched with a glass rod
A.)nematoblast of will be discharged
B. )nematoblast will not discharge
C). nematoblast will die
D.) none of the above

7)nematocyst is
A. )cell
B).group of cell
C.) organ
D)part of cell

8) undigested food of hydra is expelled from
A. mouth
B. anus
C. general surface
D. hypostome

9)Hydra does not feed on  lower animals because A.) they are so small
B. )they are distasteful
C. )they lack glutathione
D.)none of the above

10) Hydra is
A. insectivorous
B. frugivores
C. omnivorous
D. carnivorous

11)tentacles of hydra are
A. Hollow
B solid
C. half solid half Hollow
D. none of the above

12)the green colour of hydra is due to
A. zoo chlorella
Bchloroplasts
C. pigment
D. none of the above

13) which nematoblast coil around the prey
A. penetrance
B. Volvants
C. Glutinants
D. none of the above

14)hypnotoxin is
A) a protein
B) carbohydrates
C) lipids and
D) none of the above

15)freshwater e polyp is
A. hydra
B. Aurelia
C. physalia
D. obelia

16) Hydra contracts its body by means of
A. interstitial cells
B. cnidoblasts
C. nutritive cells
D. epithelial muscular cells

17) Hydra can digest all types of food except
A) proteins
B. fats
C. starches
D. none of the above

18) larva of hydra is
a) absent
b) planula
c) tadpole
d) hydraulic
19) Hydra/ obelia is
a) diploblastic ,radially symmetrical and acoelomate
b)  diploblastic ,bilaterally symmetrical and coelomate
c.) triploblastic radially symmetrical acoelomate  d.) triploblastic bilaterally symmetrical

20) zoo chlorella and zooxanthellae present in hydra are
a) symbionts in nutritive cells
b)symbionts  in the gut
c).  symbionts  in cnidoblasts
d)organism that provide hypnotoxin

21)body cavity of hydra is called
a.) enterocele
b.) coeleteron
c)gastrovascular cavity
d.) both B and C

22)What is the most favourite food of Hydra

A:  Small fishes

B:  Bacteria

C:  Tadpole

D:  Water Flea

23)Nematocyst are developed from
A) interstitial cells
B) epithelial muscular cells
C) ectodermal cells
D) endodermal cells

24)The mesoglea is
A) Partly cellular partly fibrous
B) Neither cellular nor fibrous
C) Only fibrous
D) Cellular

25)largest nematocyst of Hydra is
A) Volvents
B) Atrichous
Isorhiza
C)  holotrichous isorhiza
D) penetrants

26)Gastrula of Hydra is formed by
a) Invagination
B) Epiboly
C) Emboly
D)Delamination

27)Secretion of mesoglea is done by
A) epidermis
B) gastrodermis
C) hypostome
D) both a & B

28)Not found in Hydra
A) Intracellular digestion
B) Regeneration
c) Fertilisation
D) Metamorphosis

29 ) development of daughter Hydra is
A)  indirect
B) direct
C) no development
D) none

30)In Hydra (cnidarians)
digestion of food is
A) Intracellular
B) Extracellular
C) Both A  & C
D) none

For answer key Scroll Down plz.

Answer key :::

1)A  

2)C

 3) A

 4) A 

5) A 

6)A

 7) D.

 8) A

 9) C 

 10) D

11)A. 

12)A  

13) B

  14)A    

 15) A

 16) D

17)C

18)A

19)A

20)A

21)D

22)D

23)A

24)C

25)D

26)D

27)D

28)D

29)B

30)C