The factors responsible for the rapid spreading of bread mould on slices of bread are :
(i) presence of large number of spores in air
(ii) presence of large number of thread-like branched hyphae
(iii) presence of moisture and nutrients
(iv) formation of round shaped sporangia

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

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Solution

(a) (i) and (iii)
The factors responsible for the rapid spreading of bread mould on slices of bread are the presence of a large number spores in air and the presence of moisture and nutrients in bread that act as food for the fungi.

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Question 14
Factors responsible for the rapid spread of bread mould on slices of bread are

(i) large number of spores
(ii) availability of moisture and nutrients in bread
(iii) presence of tubular branched hyphae
(iv) formation of round shaped sporangia

(a) (i) and (iii)
(b) (ii) and iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Q. Factors responsible for the rapid spread of bread mould on slices of bread are:
(i) Large number of spores
(ii) Availability of moisture and nutrients in bread
(iii) Presence of tubular branched hyphae
(iv) Formation of round shaped sporangia
Which of the above statements are true?

Question 7
Read the following environmental conditions of tropical rain forests.

i) Hot and humid climate
ii) Unequal lengths of day and night
iii) Abundant rainfall
iv) Abundant light and moisture

Identify the conditions from the above list that are responsible for the presence of large number of plants and animals in tropical rain forests.

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i), (iii) and (iv)
(d) (ii) and (iv)

Q. Question 1
Given below from (i) to (iv) are some food items.

(i) Boiled and mashed potato
(ii) Glucose solution
(iii) A slice of bread
(iv) Mustard oil

Which of the above will give blue-black colour when tested with iodine?

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii) and (iv)

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(a) (i) and (iii) The factors responsible for the rapid spreading of bread mould on slices of bread are the presence of a large number spores in air and the presence of moisture and nutrients in bread that act as food for the fungi.

(a) (i) and (iii)
The factors responsible for the rapid spreading of bread mould on slices of bread are the presence of a large number spores in air and the presence of moisture and nutrients in bread that act as food for the fungi.