Science · Textbook solutions

Life Processes

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 34 questions

5.1 What are Life Processes?

4 q

Practice · 4

IT 5.1 Q1 $Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?$
IT 5.1 Q2 $What criteria do we use to decide whether something is alive?$
IT 5.1 Q3 $What are outside raw materials used for by an organism?$
IT 5.1 Q4 $What processes would you consider essential for maintaining life?$

5 q

Practice · 5

IT 5.2 Q1 $What are the differences between autotrophic nutrition and heterotrophic nutrition?$
IT 5.2 Q2 $Where do plants get each of the raw materials required for photosynthesis?$
IT 5.2 Q3 $What is the role of the acid in our stomach?$
IT 5.2 Q4 $What is the function of digestive enzymes?$
IT 5.2 Q5 $How is the small intestine designed to absorb digested food?$

4 q

Practice · 4

IT 5.3 Q1 $What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?$
IT 5.3 Q2 $What are the different ways in which glucose is oxidised to provide energy in various organisms?$
IT 5.3 Q3 $How is oxygen and carbon dioxide transported in human beings?$
IT 5.3 Q4 $How are the lungs designed in human beings to maximise the area for exchange of gases?$

5 q

Practice · 5

IT 5.4 Q1 $What are the components of the transport system in human beings? What are the functions of these components?$
IT 5.4 Q2 $Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?$
IT 5.4 Q3 $What are the components of the transport system in highly organised plants?$
IT 5.4 Q4 $How are water and minerals transported in plants?$
IT 5.4 Q5 $How is food transported in plants?$

3 q

Practice · 3

IT 5.5 Q1 $Describe the structure and functioning of nephrons.$
IT 5.5 Q2 $What are the methods used by plants to get rid of excretory products?$
IT 5.5 Q3 $How is the amount of urine produced regulated?$

13 q

Ex 5 Q1 $The kidneys in human beings are a part of the system for$
1. A. $nutrition$
2. B. $respiration$
3. C. $excretion$
4. D. $transportation$
Ex 5 Q2 $The xylem in plants are responsible for$
1. A. $transport of water$
2. B. $transport of food$
3. C. $transport of amino acids$
4. D. $transport of oxygen$
Ex 5 Q3 $The autotrophic mode of nutrition requires$
1. A. $carbon dioxide and water$
2. B. $chlorophyll$
3. C. $sunlight$
4. D. $all of the above$
Ex 5 Q4 $The breakdown of pyruvate to give carbon dioxide, water and energy takes place in$
1. A. $cytoplasm$
2. B. $mitochondria$
3. C. $chloroplast$
4. D. $nucleus$
Ex 5 Q5 $How are fats digested in our bodies? Where does this process take place?$
Ex 5 Q6 $What is the role of saliva in the digestion of food?$
Ex 5 Q7 $What are the necessary conditions for autotrophic nutrition and what are its by-products?$
Ex 5 Q8 $What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.$
Ex 5 Q9 $How are the alveoli designed to maximise the exchange of gases?$
Ex 5 Q10 $What would be the consequences of a deficiency of haemoglobin in our bodies?$
Ex 5 Q11 $Describe double circulation of blood in human beings. Why is it necessary?$
Ex 5 Q12 $What are the differences between the transport of materials in xylem and phloem?$
Ex 5 Q13 $Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.$