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Flowering plants are called angiosperms. They bear the reproductive parts within the flower and their seeds are enclosed in a fruit. Most plants have both male and female reproductive organs in the same flower and are known as bisexual flowers.  While others have their male or female reproductive parts in a flower known as unisexual flowers.

1. The correct sequence of reproductive stages seen in flowering plants is

(i) gametes, zygote, embryo, seedling

(ii) seedling, zygote, embryo, gamete

(iii) gametes, embryo, zygote, seedling

(iv) zygote, gamete, embryo, seedling

2. The diagram shows the cross - section of a flower just before fertilisation. Where will the male and female gametes be just before fertilisation ?

(i) 1, 5 

(ii) 1, 4

(iii) 1, 2

(iv) 3, 5

3. The diagram represents gamete P and Q fusing to give B cell. This cell further produces gametes S, T, = U, V. Which statement about the number of chromosomes in the cells and gametes is correct ?

(i) The number of chromosomes in P and Q  are different

(ii) The number of chromosomes in P and W is the same

(iii) The number of chromosomes in S is one - quarter of chromosomes in R.

(iv) The number of chromosomes in T is half the number of chromosomes in Q.

4. Label the parts R and N in the below picture.

(i) A = petel, B = stigma

(ii) A = petel, B = sepal

(iii) A = sepal, B = stigma

(iv) A = anther, B = stigma

5. Check if the labelling shown in the picture below is correct.

(i) YES

(ii) NO

1 Answer

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1. (i) gametes, zygote, embryo, seedling

2. (iv) 3, 5

3. (ii) The number of chromosomes in P and Q is the same

4. (i) A = petal, B = stigma

5. (i) YES

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