Lesson 1 - Methods of Nutrition

Question 1

What is nutrition?

Answer 1

Process by which an organism obtains energy and/or matter to develop snd maintain structure and life functions

Question 2

What are autotrophs?

Answer 2

Organisms which can create their own complex organic molecules from inorganic molecules using light or chemical energy

Question 3

Describe difference between chemoautotrophs and photoautotrophs

Answer 3

Chemoautotrophs uses energy from chemical reactions to create organic molecules where’s photoautotrophs use light as energy to carry out photosynthesis

Question 4

What are heterotrophs?

Answer 4

Organisms which can’t produce their own organic molecules so they consume large complex molecules from other organisms.

Question 5

Describe nutritional process of holozoans

Answer 5

• Ingest
• Digest
• Absorption
• Assimilation
• Egestion

Question 6

What is assimilation?

Answer 6

When absorbed nutrients are used for energy, repair and growth

Question 7

What are saprotrophs?

Answer 7

Organisms which feed on dead/decaying organic matter by secreting enzymes, digesting food externally. Soluble molecules then absorbed via diffusion or active transport

Question 8

What are parasites?

Answer 8

Organisms which live in or on another organism, obtaining nourishment at the expense of it