Chapter 6-Nutrition

Chapter 6-Nutrition

6.1 Types of Nutrition

1)Complete the following sentences on nutrition.

(a)      Nutrition is the process by which living organisms obtain _______ which require by both supplying ______ ,growth,replacing damaged tissues and maintaining physical health.

(b)     Autotrophic nutrition refers to the type of nutrition where living organisms _______ synthesise complex organic compunds from simple inorganic substances using ______ or chemical energy.

(c)      __________________ are organisms that synthesise ______ compunds (food) from simple inorganic compounds by using energy released from oxidising minerals,like nitrates,____________,and sulphides.For example,________ bacteria use energy released from the oxidation of hydrogen sulphide to form _________.

(d)     Photosynthetic autotrophs are organisms that synthesise organic compunds (food) from inorganic compunds of water and _______________,using ____________ as their source of energy.

(e)      Hetetrophic nutrition is the type of nutrition where living organisms obtain energy through the intake and ________ of organic matter from other __________.

(f)        Holozoic nutrition is the type of nutrition where living organisms _________complex organic matter and then ________ it to obtain simple substances and energy.

(g)      Saprophytism refers to the process by which living organisms ______ on dead or _________ organic matter by extracellular digestion.

(h)      Paratism is a close association between _____ organisms where one of them lives in or on the other to obtain ______ from the host.

Answers:-

(a)nutrients,energy

(b) synthesise,light

(c)Chemosynthetic autotrophs,organic,carbon  

dioxide,sulphur,carbohydrates

(d)carbon dioxide,sunlight

(e)digestion,organisms

(f)ingest,digest

(g)feed,decaying

(h)two,nutrients