Home
Current Affairs January 2024

What is the correct answer?

4

Tentacles of Hydra help in

A. locomotion

B. food capturing

C. locomotion and food capturing

D. respiration

Correct Answer :

C. locomotion and food capturing


Related Questions

What is the correct answer?

4

The nematocysts develop from

A. musculo-epithelial cells

B. interstitial cells

C. digestive cells

D. nerve cell

What is the correct answer?

4

Hydra is

A. marine, radial, symmetrical and diploblastic

B. fresh water, biradial, symmetrical and triploblastic

C. fresh water, radial, symmetrical and diploblastic

D. marine, radial, symmetrical and triploblastic

What is the correct answer?

4

Body wall of coelentrates is described as

A. diploblastic

B. integument

C. multicellular

D. triploblastic

What is the correct answer?

4

Hydra responds to a strong mechanical stimulus such as agitating the surface of water by

A. somersaulting

B. contracting a part or whole of its body

C. walking away

D. looping

What is the correct answer?

4

In Hydra, the gastrodermis is composed of

A. musculo-epithelial cells

B. musculo-nutritive cells

C. sensory cells

D. cniboblasts

What is the correct answer?

4

Strobilization is the characteristic feature of

A. Aurelia

B. Hydra

C. Metridium

D. Physalia

What is the correct answer?

4

Ctenophores differ form cnidorians in one important aspect, that is

A. absence of musculoepithelial cells in the body wall

B. absence of nematocysts

C. absence of sensory cells

D. absence of sexual reproduction

What is the correct answer?

4

In Hydra, the absence of circulatory system is fulfilled by

A. ectoderm

B. endoderm

C. mesoglea

D. coelenteron

What is the correct answer?

4

The flagella of food-absorbing cells in hydra aid in

A. stirring up the digestive fluid in the digestive cavity

B. engulfing food particles

C. engulfing semi-digested particles inside food- absorbing cells

D. none of these

What is the correct answer?

4

Tentaculocysts in Obelia are meant for

A. locomotion

B. balancing

C. swimming

D. reproduction

What is the correct answer?

4

The nematocysts which are mainly used for defense and offense and which tightly coil around the prey are

A. steptoline or atrichous

B. streptoline or holotrichous

C. volvent or desmonemes

D. penetrant or stenoteles

What is the correct answer?

4

The small green alga that lives inside Hydra is called

A. Zoochlorella

B. Chlamydomonas

C. Euglena

D. None of these

What is the correct answer?

4

Hydra reproduces by budding when

A. plenty of food is present

B. pond is going dry

C. Hydra is alone

D. water becomes muddy

What is the correct answer?

4

Nematocysts of Hydra are important for

A. cataching prey

B. paralysing prey

C. testing the food

D. testing the water

What is the correct answer?

4

Hydra has no special structure for

A. attachment

B. respiration

C. food capturing

D. offense

What is the correct answer?

4

Ephyra is the larval form of

A. Sea anemone

B. Aurelia

C. Obelia

D. Hydra

What is the correct answer?

4

The mesoglea in Hydra is traversed by

A. sensory cells

B. nerve cells

C. interstitial cells

D. all of these

What is the correct answer?

4

Among coelenterates medusoid individuals are absent in members of the class

A. hydrozoa

B. scyphozoa

C. anthozoa

D. all the three

What is the correct answer?

4

Pueumatophore is present in

A. Tubularia

B. Obelia

C. Hydra

D. Physalia

What is the correct answer?

4

The body of Hydra is

A. asymmetrical

B. bilaterally symmetrical

C. radially symmetrical

D. irregular

What is the correct answer?

4

Green Hydra is

A. Hydra vulgaris

B. Chlorohydra viridisma

C. Hydra oligaetis

D. None of these

What is the correct answer?

4

Which of the following tissue is absent in Hydra ?

A. Connective tissue

B. Epithelial tissue

C. Muscular tissue

D. Nervous tissue

What is the correct answer?

4

What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?

A. Endodermal cells

B. Mouth

C. Nematocysts

D. Tentacles

What is the correct answer?

4

In Hydra, the nematocysts are abundant on

A. upper part

B. middle part

C. tentacles

D. lower part

What is the correct answer?

4

Digestion in Hydra is

A. intracellular

B. extracellular

C. first extracellular, then intracellular

D. first intracellular, then extracellular

What is the correct answer?

4

Coral reef formation is mainly related to

A. sponges

B. anthozoans

C. molluscs

D. hydrozoans

What is the correct answer?

4

Polymorphism is best defined as the occurrence of

A. several types of organ-systems in an individual

B. different kinds of larval forms in the life history of an animal

C. different functions performed by a single kind of organism

D. several different types of individuals in a species

What is the correct answer?

4

Hydra respires through

A. mesoglea

B. general surface

C. pellicle

D. gastrodermis

What is the correct answer?

4

If a Hydra is cut into two pieces, it is noted that

A. both parts die

B. both parts make up the loss and form two new individuals

C. both parts live independently as they are

D. none of these

What is the correct answer?

4

Hydra reproduces by gemmation (budding) when

A. Plenty of food is present

B. Pond dries up

C. Water becomes muddy

D. Hydra is alone