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Q5. Show with the help of a sketch that plants are the ultimate source of food.

Fill in the blanks:

a) Green plants are called _________________ since they synthesise
their own food.

b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis solar energy is absorbed by the pigment called ___________.

(d) During photosynthesis plants take in ______________________ and release __________________ gas.

Q7. Name the following:

(i) A parasitic plant with yellow, slender and branched stem.

Q7. Name the following :

(ii) A plant that is partially autotrophic.

Q7. Name the following :

(iii) The pores through which leaves exchange gases.

Q8. Tick the correct answer:

Cuscuta is an example of :

(i) autotroph (ii) parasite (iii) saprotroph (iv) host

Q8. Tick the correct answer:

(b) The plant which traps and feeds on insects is:

(i) Cuscuta (ii) china rose (iv) pitcher plant (iv) rose

Q9. Match the items given in Column I with those in Column II:

Column I Column II

Chlorophyll                 Rhizobium
Nitrogen                     Heterotrophs
Cuscuta                     Pitcher plant
Animals                     Leaf
Insects                      Parasite

Q10. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

Q11. Choose the correct option from the following:

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals

Q12. Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

(i) roots (ii) stem (iii) flowers (iv) leaves

Q12. Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?

Let $A = \left \{ -1,2,3\right \}$ and $B = \left \{ 1,3\right \}$ . Determine

I) AXB ii)BXA iii) BXB iv) AXA

If $P = \left \{ {x : x < 3, x \in N} \right \}$ , $Q = \left \{ {x : x \leq 2, x \in W} \right \}$ . Find $(P \cup Q) \times (P \cap Q)$ , where W is the set of whole numbers.

If $A = \left \{ {x : x \in W, x < 2} \right \}$ , $B = \left \{ {x : x \in N, 1 < x < 5} \right \}$ , $C = \{ 3, 5\}$ find

I) $A \times (B \cap C)$ (ii) $A \times (B \cup C)$

In each of the following cases, find a and b.
(i) $(2a + b, a - b) = (8, 3)$

(ii) $(a/4 , a - 2b) = (0, 6 + b)$

Given $A = \left \{1, 2, 3, 4, 5\right \}$ , $S = \left \{(x, y) : x \in A, y \in A\right \}$ . Find the ordered pairs which satisfy the conditions given below:

(i) $x + y = 5$

(ii) $x + y < 5$

(iii) $x + y > 8$

Given $R = \left \{(x, y) : x, y \in W, x^2 + y^2 = 25\right \}$ . Find the domain and Range of R.

If $R1 = \left \{(x, y) | y = 2x + 7, where\: \: x \in R \: \: and - 5 \leq x \leq 5\right \}$ is a relation. Then find the domain and Range of $R1$ .

If $R_2 = \left \{(x, y) | \: \: x \: \: and \: \: y \: \: are \: \: integers \: \: and\: \: x^2 + y^2 = 64\right \}$ is a relation. Then find $R_2$ .