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BIOLOGY, M5 2024 HSC 5 MC

The diagram shows a cell reproducing.
 

Which row of the table correctly identifies the method of reproduction and the type of organism shown in the diagram?

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→ The diagram shows a cell with both mitochondria and a cell wall, and is reproducing via an outgrowth from the parent cell.

→ This represents budding in fungi rather than the other reproductive methods listed for different organisms.

Mean mark 56%.

BIOLOGY, M5 2023 HSC 33

Mechanisms of reproduction for both humans and generalised fungi are shown in the diagrams.

 


 

Describe the similarities and differences of reproduction in humans and generalised fungi.  (4 marks)

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Similarities

→ Both human and fungi reproduction use mitosis and meiosis.

→ Both human and fungi reproduction form zygotes with chromosomes from two different individuals.

Differences

→ Humans reproduce through sexual reproduction while fungi use asexual spores or sexual reproduction.

→ Humans produce egg and sperm cells which fuse to form a zygote, while fungi produce spores which germinate to produce mycelium which can be formed sexually or asexually.

Show Worked Solution

Similarities

→ Both human and fungi reproduction use mitosis and meiosis.

→ Both human and fungi reproduction form zygotes with chromosomes from two different individuals.

Differences

→ Humans reproduce through sexual reproduction while fungi use asexual spores or sexual reproduction.

→ Humans produce egg and sperm cells which fuse to form a zygote, while fungi produce spores which germinate to produce mycelium which can be formed sexually or asexually.

Mean mark 56%.

BIOLOGY, M5 2019 HSC 27

Yeast is a single-celled fungus that can reproduce by budding.

  1. What type of reproduction is budding?   (1 mark)

  2. Outline a procedure that could be used to test the effect of temperature on reproduction in yeast.   (4 marks)

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a.   Asexual.

b.   Steps of procedure:

  1. Prepare 4 water baths of 20, 30, 40 and 50 degrees Celsius.
  2. Add 10mL of yeast suspension in 12 different test tubes.
  3. Place 3 test tubes into each of the 4 water baths.
  4. Incubate for 3 hours.
  5. Take a drop from each test tube and inspect under a microscope using a mm grid and recording yeast counts for each.
  6. Compare the number of cells present at each temperature to see which temperature is most optimal for yeast reproduction.
Show Worked Solution

a.   Asexual.

b.   Steps of procedure:

  1. Prepare 4 water baths of 20, 30, 40 and 50 degrees Celsius.
  2. Add 10mL of yeast suspension in 12 different test tubes.
  3. Place 3 test tubes into each of the 4 water baths.
  4. Incubate for 3 hours.
  5. Take a drop from each test tube and inspect under a microscope using a mm grid and recording yeast counts for each.
  6. Compare the number of cells present at each temperature to see which temperature is most optimal for yeast reproduction.

♦♦ Mean mark (b) 45%.