Question

1. A unicellular, photosynthetic organism could be:  a plant  a prokaryote  a fungus  a protist Select all correct answers from the list above. Briefly explain your reasoning.

2. What is bulk transport? Briefly explain why bulk transport is important for large organisms with complex multicellularity.

Answer 1

Answer 1)

Plant, prokaryote, protist.

An algae contains chlorophyll. They carry photosynthesis to make their own food. Some are unicellular in nature. For example: Chlamydomonas.

Prokaryotes such as cyanobacterias have chlorophyll and they are unicellular in nature.

Protist such as euglena, diatoms are unicelluar in nature and they carry out photosynthesis.

Fungus are unicellular as well as multicellular in nature. They don't have chlorophyll. They depend on another organisms for nutrition.

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2) Bulk transport is defined as the transport of macromolecules such as protein carbohydrate across the cell membrane via utilising the energh of ATP.

Examples of bulk transport are: Endocytosis and excytosis.

Bulk transport is important due to following reasons:

The bulk transport is essential for movement of drink form of food across the membrane by the process of pinocytosis. It is a form of endocytosis.

The bulk transport is also essential for movement of solid food across membrane. It is a form of endocytosis.

It also exports the food outside via endocytosis.

The essential macromolecules such as protein, carbohydrates are taken by the cell via bulk transport.

It also exports such macromolecules outside the cell.