• EXERCISES
A. Very-Short-Answer Questions
1. Why is diffusion sufficient for transporting food
and oxygen in unicellular organisms?
2. How can we distinguish the living from the
nonliving things?
3. Name the different modes of nutrition.
4. Name the requirements for photosynthesis.
5. What are the two stages in photosynthesis?
6. How do autotrophs obtain CO2 and N, to make
their food?
[CBSE).
7. What is the action of saliva on starch?
D.
Answers
Answer:
1- because they also need energy to live.
Answer:
1.diffusion in insufficient to meet the oxygen requirment of multicellular organisms like humans because multi cellular organs have a complex body design
2. living things breathe eat grow more productive and have a sense non living thing does not eat grow breath reproductive and they do not have a sense
3. two modes of nutrition autotrophic and heterotrophic
4. the requirement of photosynthesis are chlorophyll carbon dioxide water sunlight
5. two stage of photosynthesis (1 )light depends (2) reaction on the Calvin cycle
6. autotrophic are known as a producer they obtained carbon dioxide from the atmosphere. but it can't absorb nitrogen from the atmosphere , it's absorb the nitrogen from the soil
7.saliva: saliva help chewing the food break down the large particles of the food in the small one
starch: stretchy in the most convert a sugar into matatolose.
8. series of involuntary wave like muscle contraction when move from along the digestive tract
9. duodenum, jejunum, and ileum
Explanation:
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