Bio1-2:Nutrition in Unicellular Organisms

What are the two types of unicellular organisms?

Autotrophs and heterotrophs

What can primitive autotropic organisms produce?

Necessary organic material by using sunlight energy but they can take food from the environment and feed heterotrophically.

what type of organism is Euglena?

Euglena is an autotrophic organism organism but it has heterotrophic types.

Explain Euglenas nutrition

It is diverse in its nutrition because autotrophic types get food from the environment. In the absence of light and if it lives in the dark continuously it'll loose its chloroplast and will live as a heterotrophic organism for the rest of its life.

What do unicellular organisms get food by?

Phagocytosis

What happens in Phagocytosis?

In this nutrition type cell membrane forms pseudopodia that surrounds the food and food vacuole is formed in cytoplasm.

What does the vacuole fuse with?

the lysosome which contains digestive enzymes.

After completing the digestion where does the food pass through?

The cytoplasm and waste is removed by exocytosis

What is osmosis?

Its the movement of water through the semi-permable membrane.

Where does water exchange occur

Between cytoplasm and external membrane.

Another word for cell drinking

Pinocytosis

Another word for swallowing

Phagocytosis

What is "Active transport"?

the taking of necessary material from a low concentrated mediums to high concentrated mediums by using energy (ATP).

What happens in saprophytic types of nutrition?

Digestive enzymes are secreted out of cellls.

How can digested food pass?

By diffusion which is the movement of materials from a high concentrated medium to a low concentrated medium without using energy.