Ch2 Hydra Flashcards by ramisha manan

Q

Toxic substance inside nematocyst

A

Hypnotoxin

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Q

What locomotion is used in long distance

A

Looping

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Q

What part of hydra has most no. Of cnidocytes

A

Tentacles

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Q

Located throughtout the epidermis of hydra

A

Musculo-epithelial cell

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Q

What cell can produce any kind of cell in hydra

A

Interstitial cell

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Q

Not a food of hydra

A

Small grass

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Q

Smallest nematocyst

A

Stereolin glutinant

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Q

Method used for rapid movement

A

Somersaulting

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Q

Can hydra reproduce sexually and asexually

A

Yes

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Q

Function of bud of hydra

A

Asexual

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Q

Epidermal cells are-

A

Musculo-epithelial, interstitial, nerve cell, gland cell, cnidocytes, gonads

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Q

Cells of gastrodermis (5)

A

Musculo, interstitial, sensory, nerve, gland

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Q

Which phyla is diploblastic

A

Cnidaria, ctenophora

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Q

Who discovered hydra? Who named it?

A

Trembley, linnaeus

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Q

Which species of hydra are in BD

A

Oligactis, viridissima, vularis

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Q

Which hydra species is most common in BD

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A

VULGARIS

Q

What do hydra eat

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A

Carnivores

Q

What kind of symmetry does hydra have

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A

Radial

Q

How many tentacles present

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A

6-10

Q

When does budding occur

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A

Summer

Q

When is breeding season

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A

Autumn winter

Q

How does pedal disc help hydra to float

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A

Bubbles

Q

Where are cnidocyte cells not found

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A

Pedal disc

Q

What is hypnotoxin made od

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A

Protein and phenol

Largest nematocyte

Stenotile

Function of psiedopodal cells

Deglutition of food

What cell is absent in tentacle?

Gland cell

Thickness of mesoglea

0.1 micrometer

What can hydra not digest

Starch