Available Answers

1. 1.

   Choose the correct answer:

   1. The outermost whorl of the Hibiscus flower is 
      1. calyx
      2. corolla
      3. epicalyx
      4. androecium
   2. Rafflesia is pollinated by 
      1. bee
      2. wind
      3. elephant
      4. bird
   3. Cotton seeds are dispersed by
      1. water
      2. animals
      3. wind
      4. explosive
   4. Stigma is a part of the 
      1. androecium
      2. gynoecium
      3. calyx
      4. corolla
   5. Viviparous germination is shown by 
      1. mangrove
      2. banyan
      3. bean
      4. maize
   6. Receptacle is 
      1. the outermost whorl of the flower
      2. the innermost whorl of the flower
      3. the part of the flower with which it is attached to the stem
      4. the upper expanded tip of the flower stalk
   7. Which of the following statements is not true for the calyx?
      1. Generally green in colour
      2. Outermost whorl of the flower
      3. Protests the flower in the bud stage
      4. Produces pollen grain
   8. After fertilisation the ovary becomes the 
      1. flower
      2. fruit
      3. seed 
      4. embryo
   9. Which is the innermost hard layer of the fruit?
      1. Pericarp
      2. Endocarp
      3. Mesocarp
      4. Epicarp
   10. Which of the following are correctly matched?
       i. Dispersal of seed by wind - Cotton
       ii. Dispersal of seed by water - Coconut
       iii. Dispersal of seed by animal - Xanthium
       1. i and ii
       2. i and iii
       3. i, ii and iii
       4. none of these
2. 2.

   Fill in the blanks:

   1. After the pollen grain reaches the stigma of the flower, it produces a ____________.
   2. Fruits of ____________ has a spongy outer covering.
   3. Fruits are good sources of ____________.
   4. ____________ seeds have hairs on their surface.
   5. ____________ and ____________ trees have incomplete flowers.
   6. Hibiscus flower has ____________ sepals that are ____________.
   7. The flattened, expanded part of leaf is the ____________.
   8. The ____________ of leaves help in circulation of water and food.
3. 3.

   Name the following:

   1. Second whorl of sepals in China rose
   2. Type of germination in mangrove
   3. Part of the flower containing ovules
   4. A flower pollinated by bats
   5. The dry outer skin of fruits
   6. A plant having air-filled seed
   7. Part of the seed that stores food for the baby plant
   8. A seed having hooks
4. 4.

   Mention whether the following statements are True (T) or False (F). If false, correct them by changing only one word.

   1. Gourd plant bears bisexual flower.
   2. Style is a part of ther stamen.
   3. Mesocarp forms the pulp of the fruit.
   4. Zygote becomes embryo after fertilisation.
   5. cobalt chloride paper is pink when dry.
   6. The tip of the leaf blade is called petiole.
   7. Control setup is used to compare results.
   8. Castor seed is a monocot seed.
5. 5.

   How are the sepals of Hibiscus unique? How many sepals are there?
6. 6.

   How does the dispersal of fruits occur by animals?