Tag: zoology

Questions Related to zoology

Biradial symmetry and lack of cnidoblasts are the characteristics of-

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Starfish and sea anemone

  2. Ctenoplana and Beroe

  3. Aurelia and Paramecium

  4. Hydra and starfish

Show answer
Correct Option: B
Explanation:
Ctenoplana and Beroe lack cnidobiasts and have brradial symmetry. These belong to phylum-Ctenophora. Hydra, sea anemone and Aurelia are coelenterates which have cnidoblasts. Although sea anemone has biradial symmetry.

So, the correct answer is 'Ctenoplana and Beroe'.

Match list I with list II and select the correct option.

List I List II
a. Protozoa 1. Cleiona
b. Aschelminthes 2. Beroe
c. Porifera 3. Monocystis
d. Ctenophora 4. Wuchereia
e. Cnidaria 5. Pennatula
zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. a- 3, b- 4, c- 1, d- 2, e- 5 

  2. a- 4, b- 3, c- 1, d- 2, e- 5 

  3. a- 5, b- 4, c- 1, d- 2, e- 3 

  4. a- 1, b- 4, c- 3, d- 2, e- 5 

Show answer
Correct Option: A
Explanation:

Beroe (comb jellyfish) belong to the Ctenophora. Monocystis is an endoparasite found in the seminal vesicles and coelom of earthworm (Annelida). Wuchereria is a human parasitic roundworm (Aschelminthes) known to cause lymphatic filariasis. Pennatula is colonial marine cnidarian. Cleiona belongs to Porifera.

Therefore, the correct answer is option A.

Presence of comb plates is characteristic feature of

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Porifera

  2. Cnidaria

  3. Ctenophora

  4. Platyhelminthes

  5. Annelida

Show answer
Correct Option: C
Explanation:

Ctenophores are commonly known as sea whales or comb jellies, radially symmetry, diploblastic organisms with tissue level of organization. The body bears eight external rows of ciliated comb plates which help in locomotion, hence the name Ctenophora. Cnidocytes are absent.

So the correct answer is 'Ctenophora'.

Which of the following is not a characteristic of phylum Ctenophora?

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. They are exclusively marine, radially symmetrical animals

  2. They move by cilia, which join together to form eight median comb plates

  3. When the tentacles are present they are two in number and contain cnidoblasts

  4. Reproduction takes place only by sexual means

Show answer
Correct Option: A

Select the wrongly paired one from the following.

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Flats worms - Tape worm and liver fluke

  2. Sea walnuts - Hydra and Obelia

  3. Homoiothermous - Aves and mammals

  4. Incomplete digestive system - Platyhelminthes

Show answer
Correct Option: B
Explanation:

a) Tape worm and liver fluke belongs to phylum platyhelminthes, having dorsoventrally flattened body hence are flat worms.

b) Hydra and Obelia are cnidarians belongs to phylum coelenterata and exhibit two basic body forms i.e, polyp and medusa. Sea walnuts belongs to phylum ctenophora and bears comb plates.
c) Homiothermous are warm blooded animals which maintains a constant body temperature and includes aves and mammals.
d) Platyhelminthes have incomplete digestive system as they absorb nutrients from the host directly through their body surface.
So, the correct answer is option B.

Which of the following is involved in passive immunity

zoology aids to health active and passive immunity acquired immunity innate and acquired immunity

  1. $Ig\,A$

  2. $Ig\,E$

  3. $Ig\,M$

  4. $Ig\,E$

Show answer
Correct Option: A

When antibodies, extracted from other animals are injected into your body, what kind of immunity do you gain?

zoology diseases and immunity active and passive immunity acquired immunity innate and acquired immunity

  1. Artificially active acquired immunity

  2. Artificially passive acquired immunity

  3. Naturally active acquired immunity

  4. Naturally passive acquired immunity

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Correct Option: A

The transfer of antibodies from a pregnant mother to her fetus is a type of

zoology diseases and immunity active and passive immunity acquired immunity innate and acquired immunity

  1. Naturally acquired passive immunity

  2. Artificially acquired active immunity

  3. Artificially acquired passive immunity

  4. Naturally acquired active immunity

Show answer
Correct Option: A
Explanation:

Naturally acquired passive immunity is a type of antibody-mediated immunity conveyed to a fetus or infant by its mother. In humans, maternal antibodies are passed through the placenta to the fetus by an FcRn receptor on placental cells.

So, the correct option is 'naturally acquired passive immunity'.

Human genome project was discovered by

zoology mutation genome projects human genome project human genome project and dna fingerprinting

  1. Francis Collins and Roderick

  2. Watson and Crick

  3. Beadle and Tatum

  4. Paul Berg and Wollman

Show answer
Correct Option: A

Hugo de Vries' contribution is :

zoology the paths traversed by life mutational theory of evolution theories of evolution other theories of evolution

  1. Theory of Natural selection

  2. Theory of Mutations

  3. Law of Dominance

  4. Law of segregation

Show answer
Correct Option: B
Explanation:

Hugo de Vries gave a theory of evolution, called 'Mutation theory' which states that evolution is a jerky process where new varieties and species are formed by mutation.

So. the correct answer is 'Theory of Mutation'