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Tamil Nadu SSLC (Class 10) Cell Biology and Animal Classification — practice questions

Explore 4 free Cell Biology and Animal Classification questions in Tamil Nadu SSLC (Class 10) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Cell Biology and Animal Classification questions and exercises with answers

Showing questions 1–4 of 4.

Which set of phyla consists entirely of acoelomate animals?Read the answer and worked solution →Sponges of phylum Porifera possess a special type of cell. What is this cell called?Read the answer and worked solution →Sponges remain fixed to a substratum and do not move from place to place. This habit is described by which term?Read the answer and worked solution →In sponges, the pores through which water enters the body are called:Read the answer and worked solution →

Worked practice questions

Which set of phyla consists entirely of acoelomate animals?

  1. Annelida, Arthropoda and Mollusca
  2. Porifera, Cnidaria and Platyhelminthes
  3. Aschelminthes, Annelida and Mollusca
  4. Arthropoda, Echinodermata and Annelida
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Correct answer: B. Porifera, Cnidaria and Platyhelminthes

1. Acoelomates lack a body cavity entirely. 2. Porifera, Cnidaria and Platyhelminthes are the acoelomate phyla. 3. Rule out Annelida-onward groups: from Annelida they are eucoelomate. 4. Aschelminthes is pseudocoelomate, so any set containing it is wrong. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.75_

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Sponges of phylum Porifera possess a special type of cell. What is this cell called?

  1. Germ cell
  2. Cnidoblast
  3. Collar cell
  4. Ectodermal cell
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Correct answer: C. Collar cell

1. Porifera have a characteristic feeding cell. 2. This is the collar cell. 3. Rule out cnidoblast: that is the stinging cell of Cnidaria. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.76_

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Sponges remain fixed to a substratum and do not move from place to place. This habit is described by which term?

  1. Hermaphrodite
  2. Parasitic
  3. Migratory
  4. Sedentary
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Correct answer: D. Sedentary

1. Sponges attach to the substratum and show no locomotion. 2. Such fixed animals are called sedentary. 3. Rule out parasitic: that describes nutrition on a host, not the fixed habit. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.76_

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