8. (a) (i) Fungi may be classified into two groups on the basis of their nutrition - Leaving Cert Biology - Question 8 - 2015

A labelled diagram of a reproducing yeast cell should include the following components:

• Cell membrane
• Cell wall
• Nucleus
• Attached bud (or a nucleus)

In the diagram, ensure that each part is clearly labelled.

The principal nutrient added to the agar for the yeast is malt extract, which provides essential carbohydrates and nutrients necessary for yeast growth.

To introduce the yeast into the Petri dishes, I attached small pieces of leaves or leaf sections to the inside of the lid of the dish. After replacing the lid securely, the dish was kept upright for 24 hours to allow for the yeast to grow.

When the yeast had grown on the agar, it appeared as pink colonies or colonies that were distinctly pink in color, indicating successful fermentation and growth.

In carrying out the investigation into the effect of IAA on plant tissue, I prepared segments of plant tissue and treated some with different concentrations of IAA, while leaving others untreated. The tissues were left for at least 2 days to observe effects.

The results of the investigation showed a clear difference in growth and concentration of IAA. The treated tissues exhibited varied growth responses based on the concentration of IAA applied, with higher concentrations leading to more noticeable effects compared to those not exposed.