1) Hydra is: a. Marine, diploblastic and radially symmetrical b. Fresh water, diploblastic and radially symmetrical c. Marine, riploblastic and bilaterally symmetrical d. Fresh water, triploblastic and radially
|
||||
2) Tentacles of Hydra help in: a. Food capture b. Locomotion c. Both (a) & (b) d. None of these
|
||||
3) Tentacles of Hydra are: a. Hollow b. Solid c. Branched d. Irregularly arranged
|
||||
4) Hydra has no special structures for: a. Attachment b. Food capture c. Respiration d. Offence and defence
|
||||
5) Often hydra is seen moving upon its tentacles, using them as legs. This is called: a. Somersaulting b. Gliding c. Looping d. Walking
|
||||
6) Hydra can suddenly contract its body with the help of: a. Interstitial cells b. Epitheliomuscular cells c. Tentacles d. Nematoblasts
|
||||
7) Mesogloea is secreted in Hydra by: a. Epidermis b. Gastrodermis c. Both (a) & (b) d. None of these
|
||||
8) Body wall of Hydra is formed from: a. Extoderm and mesoderm b. Ectoderm and endoderm c. Endoderm and mesoderm d. Ectoderm, endoderm and mesogloea
|
||||
9) Which of these animals respires despite having no respiratory pigment: a. Earthworm b. Cockroach c. Frog d. Hydra
|
||||
10) Which of these in Hydra will be most hindered if there were no nematocyst: a. Ingestion b. Food capture c. Locomotion d. Digestion
|
||||
11) Which of these has no skeleton whatsoever: a. Butterfly b. Sponge c. Star-fish d. Jelly-fish
|
||||
12) Hydra reduces its body by contraction: a. Epidermals ribres b. Gastrodermis c. Interstitial cells d. None of these
|
||||
13) Cells of Hydra possessing flagella and pseudopodia are: a. Nematocysts b. Secretory cells c. Epitheliomuscular cells d. None of these
|
||||
14) Hydra possesses: a. Sensory cells but no nerve cells b. Both sensory and nerve cells c. Neither sensory nor nerve cells d. Nerve cells but no sensory cells
|
||||
15) Gastrovascular cavity is known to occur in which of these: a. Scypha b. Hydra c. Leucosolenia d. None of these
|
||||
16) Hydra egests undigested food residues through: a. Aboral pore b. Mouth c. Both (a) & (b) d. None of these
|
||||
17) Most favourable food for Hydra is: a. Water-fleas b. Bacteria c. Fishes d. Frog tadpoles
|
||||
18) Largest nematocysts of Hydra are: a. Penetrant b. Volvent c. Holotrichous isorhizas d. None of these
|
||||
19) Nervous system of Hydra is made up of: a. Pelarized nerve cells b. Non-polar nerve cells c. Ganglionated nerve cords d. Well defined nerves
|
||||
20) Pentrant, volvent and glutinants are various kinds of: a. Mouth parts of mosquito b. Laraval stages of Ascaris c. Nematocysts of Hydra d. None of these
|
||||
21) Which of these does not occur in Hydra: a. Regeneration b. Segmentation c. Fertilization d. Mating
|
||||
22) Hydra respires with the help of: a. Tentacles b. Body surface c. Namatocysts d. Coelenteron
|
||||
23) Which of these is found in Hydra: a. Metabolism b. Metamerism c. Metamorphosis d. Sexual dimorphism
|
||||
24) An association mutually beneficial to both partners is represented by: a. Men and honey bee b. Zoochlorellae and Hydra c. Hydra and water fleas d. Farmer and earthworm
|
||||
25) Division of labour in multicellular animals means: a. All functions by a single cell b. A single function performed by various cells jointly c. Different functions by different cell types d. Similar functions by different types of cells
|
||||
26) A single mature Hydra may bear: a. One ovary and one testis b. Many ovaries and testes c. Many ovaries and one testis d. One ovary and many testes
|
||||
27) Zoochlorellae lives inside the Hydra as: a. Parasite b. Symbiont c. Predator d. Commensal
|
||||
28) Digestion in cnidarians is: a. Extracelular b. Intracellular c. Both (a) & (b) d. None of these
|
||||
29) Zoochlorellae provides to Hydra: a. Maltose b. Fat c. Proteins d. None of these
|
||||
30) Hydra feeds upon: a. Fishes b. Small crustaceans c. Aglae d. Crabs
|
||||
31) Intracellular digestion is Hydra takes place in: a. Acidic medium b. Alkaline medium c. Neutral medium d. First acidic and then alkaline medium
|
||||
32) Hydra shows positive responses as well as negative responses, in dim and bright light it shows: a. Negative responses to both b. Positive response to both c. Positive response to weak light and negative to bright one d. Negative response to weak light and positive response to bright light
|
||||
33) In Hydra the reporduction is: a. Sexual b. Asexual c. Both esexual and sexual d. None of these
|
||||
34) In Hydra eggs and sperms are formed from: a. Cnicloblasts b. Interstitial cells c. Epitheliomuscular cells d. None of these
|
||||
35) Egg of Hydra is: a. Naked b. Covered by chitinous shell c. Covered by perisrac d. None of these
|
||||
36) Larva of Hydra is called: a. Planula b. Amphiblastula c. Scyphistoma d. Miracidium
|
||||
37) Hydra reproduces asexually by budding when: a. It is alone b. Plenty of food is available in the pond c. Environmental conditions are unfavourable d. Populations of Hydra increases
|
||||
38) In the development of Hydra the gastrulation is the result of: a. Emboly b. Delamination c. Invagination d. Epiboly
|
||||
39) Gonads develop in Hydra from: a. Epithelimuscular cells b. Interstitial cells c. Gland cells d. Nematocysts
|
||||
40) The cells in Hydra which can transform into all other types of cells are: a. Gland cells b. Nutritive muscular cells c. Interstitial cells d. None of these
|
||||
41) Sexual reproduction in Hydra occurs during: a. Hot months b. Winter months c. Both (a) & (b) d. None of these
|
||||
42) Budding in Hydra occurs during: a. Warm months b. Winter months c. Both (a) & (b) d. None of these
|
||||
43) Anterior end of Hydra with mouth is called: a. Hytpostoma b. Pedal disc c. Both (a) & (b) d. None of these
|
||||
44) Nematocyst is stimulated to discharge by: a. Cnidocil b. Lesso c. Fibres of capsule d. None of these
|
||||
45) Which of these are not found in Hydra: a. Spirocyst b. Desmonemes c. Glutinants d. Stenotele
|
||||
46) Tosin is produced by: a. Penetrant b. Desmonems c. Glutinants d. Volvents
|
||||
47) Symbiotic algae is found in which of these cells of hydra: a. Gastrodermal cells b. Epitheliomuscular cells c. Mesogloea d. Interstitial cells
|
||||
48) Mucus is secreted in Hydra by: a. Interstitial cells b. Mucus gland cells c. Enzyme cells d. Epitheliomuscular cells
|
||||
49) Atrichous isorhizas are with: a. Spiny base b. Spine on whole tube c. No spines d. Spines on butt
|
||||
50) Stenosteles of Hydra have: a. Spines on the butt b. No spines c. Spines on the whole thread d. None of these
|
||||
51) Response of Hydra to light is: a. Photonegative b. Photopositive c. Some photopositive some negative d. None of these
|
||||
52) Colony of Obelia is: a. Free floating b. Fixed c. Swimming d. None of these
|
||||
53) Colony of Obellia is: a. Monomorphic b. Dimorphic c. Trimorphic d. None of these
|
||||
54) Hydranths in Obelia colony are: a. Feeding zooids b. Sensory zooids c. Reproductive zooids d. None of these
|
||||
55) Obelia colony has: a. Gastrozooids b. Blastostyles c. Both (a) & (b) d. None of these
|
||||
56) Medusae are formed by: a. Gastrozooids through asexual reproduction b. Blastostyles through asexual reproduction c. Both through sexual reproduction d. None of these processes
|
||||
57) Medusa of Obelia is: a. Free swimming b. Fixed and non-mobile c. Floating d. None of these
|
||||
58) Tentacles in Obelia polyp are: a. Hollow b. Solid c. Irregular d. None of these
|
||||
59) Polymorphism is found in: a. Hydra b. Physailia c. Aurelia d. All of these
|
||||
60) Which of these does not exhibit polymorphsim: a. Hydra b. Jelly fish c. Metridium d. All of these
|