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Edexcel IAL Biology 3.11 Mammalian gamete specialisation

Name each structure on the diagram and link its physical or molecular feature directly to motility, penetration, genetic contribution or egg protection.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Label sperm acrosome, nucleus, mitochondria and flagellum in their correct positions.
  • Explain sperm movement through ATP supply, flagellum action and streamlined shape.
  • Relate egg cytoplasm, haploid nucleus and zona pellucida to fertilisation functions.

3.11—Mammalian gamete specialisation question 1

[Maximum number: 6]

All living organisms are made of cells. Some cells are specialised for their function.

Question (a)

(a)

One specialised cell is the sperm cell. Draw a mammalian sperm cell showing the acrosome, the nucleus and a mitochondrion. Label the acrosome, nucleus and mitochondrion.

[ 3 ]

Question (b)

(b)

A human egg cell is another example of a specialised cell.

[ 3 ]

Question (i)

(i)

Explain three ways in which a mammalian egg cell is specialised for its functions.

[ 3 ]
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