50 
~] 
25. 
26. 
27, 
28. 
. How would you prep 
BOTANY 
are oxygen? What are the properties 
of the gas, and what is its use in germination? 
Where and in what forms is carbon found in nature? 
What is the importance of carbon to a plant? 
What tests do you use for starch, sugar, cellulose, solid 
protein, and oil? 
_ What compounds did you find in the date stone, the 
castor-bean, and maize grain? 
What are the conditions necessary to germination? How 
would you prove your assertions by experiment? 
. Has light any effect on germination ? 
_ What is diastase? What other similar substances do you 
know ? 
. What are the phenomena of germination? 
. Define micropyle, testa, radicle, plumule, cotyledon. 
. How could you test the vitality of seeds? 
. Explain the importance of pure seed to the farmer. 
. Discuss the importance of seeds to man. 
. Describe the seeds of the coconut and date. 
. Why is the young plant in a seed said to be dormant? 
. Why do seedlings grow badly in soil that is too liberally 
watered ? 
. How could you measure and compare the amount of air 
in different samples of soil? 
. Seeds should not be sown too deep or laid on the surface 
of the soil. Why? 
. How could you prove that a germinating seed loses 
weight in the darkness? Explain the reason of this. 
. Compare the food stored in a bean seed and wheat grain 
with that supplied to a young bird in an egg and to an 
infant in milk. 
What is a carbohydrate? Mention the chief carbo- 
hydrates, stating how they are distinguished from one 
another. 
What is the distinction between oils and carbohydrates? 
What tests may be used for oils? 
How do proteins differ from carbohydrates? Give simple 
tests for proteins. 
How are the reserve food-substances present in a seed 
made available for the nourishment of the seedling? 
