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

A

VULGARIS

Q

What do hydra eat

A

Carnivores

Q

What kind of symmetry does hydra have

A

Radial

Q

How many tentacles present

A

6-10

Q

When does budding occur

A

Summer

Q

When is breeding season

A

Autumn winter

Q

How does pedal disc help hydra to float

A

Bubbles

Q

Where are cnidocyte cells not found

A

Pedal disc

Q

What is hypnotoxin made od

A

Protein and phenol

Q

Largest nematocyte

A

Stenotile

Q

Function of psiedopodal cells

A

Deglutition of food

Q

What cell is absent in tentacle?

A

Gland cell

Q

Thickness of mesoglea

A

0.1 micrometer

Q

What can hydra not digest

A

Starch