Cactus Plants

Q. Which part of the cactus plant performs photosynthesis?

1. Spines
2. Flowers
3. Stems
4. Roots

Q. Choose the correct option/s for the adaptations seen in cacti.

1. Leaves are turned into spines.
2. Stem is fleshy to store water.
3. Root system is well developed.
4. Tendrils are found.

Q.

Two common organisms found in deserts are ___ and ___.

Q.

Match the reasons given in column 2 to the features of cacti in column 1. There can be multiple matches.

$\begin{array}{cc}Featureofcacti& Reasons\\ a.\text{Spiny leaves}& \left(i\right)\text{Absorbing water from depths of soil}\\ b.\text{Thick, round fleshy stems}& \left(ii\right)\text{Prevent loss of water by transpiration}\\ c.\text{Deep roots}& \left(iii\right)\text{Store water}\\ d.\text{Closed stomata during the day}& \left(iv\right)\text{Prevent animals from eating the cactus}\\ e.\text{Carbon dioxide storage during the night}& \end{array}$

1. a – (iv) ; b – (ii) ; c - (iv), (iii) ; d – (i) ; e – (iii), (ii)

2. a – (ii), (iv) ; b – (ii), (iv) ; c - (i) ; d – (iii) ; e – (iii), (ii)

3. a – (ii), (iv) ; b – (ii) ; c - (i) ; d – (iii) ; e – (iii), (ii)

4. a – (ii), (iv); b – (iii), ; c - (i) ; d – (ii) ; e – (ii)

Q. Roots are positively geotropic and positively phototropic.

1. False
2. True