Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
Correct Answer :
B. Aurelia
Related Questions
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
The testes of hydra are located
below the ovaries
below the tentacles
further down the tentacles to occupy central position of the body
anywhere on the body between tentacles and adhesive disc
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
The number of tentacles in Hydra is
24
610
1040
4050
Hydra is put under phylum coelentrata because it has
tentacles
cnidoblasts
hypostome
interstitial cells
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
If a Hydra is cut into two pieces, it is noted that
both parts die
both parts make up the loss and form two new individuals
both parts live independently as they are
none of these
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Brain coral is
Fungia
Hydra
Meandria
Tubipora
The tentacles of Hydra are
pinnate
hollow
solid
frilled
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
A piece of Hydra will regenerate into a full Hydra if it contains a part of
epidermis alone
gastrodermis alone
both (a) and (b)
(a), (b) and tentacles
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
The nematocysts which are mainly used for defense and offense and which tightly coil around the prey are
steptoline or atrichous
streptoline or holotrichous
volvent or desmonemes
penetrant or stenoteles