Spiral and Determinate Cleavage Quiz

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Questions and Answers

What is a characteristic feature of spiral and determinate cleavage?

  • Symmetrical lines or planes of cleavage
  • Random distribution of blastomeres
  • Equal cells around the axis of polarity
  • Asymmetrical lines or planes of cleavage (correct)

What is the fate of each blastomere in spiral and determinate cleavage?

  • Predetermined roles in embryo formation (correct)
  • No specific roles in embryo formation
  • Symmetrical distribution in the embryo
  • Randomly determined roles in embryo formation

Which groups of organisms exhibit spiral and determinate cleavage?

  • Vertebrates and arthropods
  • Mollusks and annelids (correct)
  • Protozoa and algae
  • Plants and fungi

Match the following cleavage types with their characteristics:

<p>Spiral and determinate cleavage = Predetermined roles for all blastomeres in embryo formation Radial and indeterminate cleavage = Contrasts with spiral and determinate cleavage</p> Signup and view all the answers

Match the following cleavage types with the groups of organisms they are characteristic of:

<p>Spiral and determinate cleavage = Characteristic feature of certain groups of organisms Radial and indeterminate cleavage = Not a characteristic feature of certain groups of organisms</p> Signup and view all the answers

Match the following statements with the cleavage type they describe:

<p>Asymmetrical lines or planes of cleavage = Spiral and determinate cleavage Contrasts with radial and indeterminate cleavage = Spiral and determinate cleavage Characteristic feature of certain groups of organisms = Spiral and determinate cleavage Not a characteristic feature of certain groups of organisms = Radial and indeterminate cleavage</p> Signup and view all the answers

____ and determinate cleavage is characterized by asymmetrical lines or planes of cleavage. Cleavage lines are diagonal to the polar axis, resulting in unequal cells around the axis of polarity. All blastomeres in spiral and determinate cleavage have predetermined roles in embryo formation. The fate of each blastomere is predetermined in this type of cleavage. This type of cleavage contrasts with radial and indeterminate cleavage. It is a characteristic feature of certain groups of organisms, such as mollusks and annelids.

<p>Spiral</p> Signup and view all the answers

Spiral and determinate cleavage is characterized by asymmetrical lines or planes of cleavage. Cleavage lines are diagonal to the polar axis, resulting in unequal cells around the axis of polarity. All blastomeres in ____ and determinate cleavage have predetermined roles in embryo formation. The fate of each blastomere is predetermined in this type of cleavage. This type of cleavage contrasts with radial and indeterminate cleavage. It is a characteristic feature of certain groups of organisms, such as mollusks and annelids.

<p>spiral</p> Signup and view all the answers

Spiral and determinate cleavage is characterized by asymmetrical lines or planes of cleavage. Cleavage lines are diagonal to the polar axis, resulting in unequal cells around the axis of polarity. All blastomeres in spiral and determinate cleavage have predetermined roles in embryo formation. The fate of each blastomere is predetermined in this type of cleavage. This type of cleavage contrasts with radial and indeterminate cleavage. It is a characteristic feature of certain groups of organisms, such as ____ and annelids.

<p>mollusks</p> Signup and view all the answers

Spiral and determinate cleavage is characterized by symmetrical lines or planes of cleavage

<p>False (B)</p> Signup and view all the answers

All blastomeres in spiral and determinate cleavage have predetermined roles in embryo formation

<p>True (A)</p> Signup and view all the answers

Spiral and determinate cleavage is a characteristic feature of certain groups of organisms, such as mollusks and annelids

<p>True (A)</p> Signup and view all the answers

What is the characteristic feature of spiral and determinate cleavage?

<p>Asymmetrical lines or planes of cleavage (A)</p> Signup and view all the answers

Which type of cleavage contrasts with spiral and determinate cleavage?

<p>Radial and indeterminate cleavage (D)</p> Signup and view all the answers

What is the fate of each blastomere in spiral and determinate cleavage?

<p>Predetermined roles in embryo formation (A)</p> Signup and view all the answers

____ and determinate cleavage is characterized by asymmetrical lines or planes of cleavage

<p>spiral</p> Signup and view all the answers

All blastomeres in spiral and ______ cleavage have predetermined roles in embryo formation

<p>determinate</p> Signup and view all the answers

In spiral and determinate cleavage, the cleavage lines are diagonal to the polar axis, resulting in:

<p>Unequal cells around the axis of polarity (B)</p> Signup and view all the answers

What is the fate of each blastomere in spiral and determinate cleavage?

<p>Predetermined in embryo formation (C)</p> Signup and view all the answers

Which groups of organisms exhibit spiral and determinate cleavage?

<p>Mollusks and annelids (C)</p> Signup and view all the answers

Spiral and determinate cleavage is characterized by symmetrical lines or planes of cleavage.

<p>False (B)</p> Signup and view all the answers

In spiral and determinate cleavage, the fate of each blastomere is predetermined.

<p>True (A)</p> Signup and view all the answers

Spiral and determinate cleavage is a characteristic feature of certain groups of organisms, such as arthropods and echinoderms.

<p>False (B)</p> Signup and view all the answers

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Study Notes

Spiral and Determinate Cleavage

  • Characterized by asymmetrical lines or planes of cleavage
  • Cleavage lines are diagonal to the polar axis, resulting in unequal cells around the axis of polarity
  • All blastomeres have predetermined roles in embryo formation
  • The fate of each blastomere is predetermined in this type of cleavage
  • Contrasts with radial and indeterminate cleavage
  • Characteristic feature of certain groups of organisms, such as mollusks and annelids

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