Selina solutions concise biology class 9 icse Solutions for Chapter 4 the flower

Mention if the following statements are true(T) or false(F)

(i) Flowers can be complete or incomplete T/F

(ii) A flower typically has six floral whorls. T/F

(iii) Bracts are usually green, but sometimes large and colorful. T/F

(iv) Nasturtium has nectaries T/F

(v) Stamens and carpels are the male and female parts T/F

(vi) The prefix “gamo-“ is used whenever any of the floral whorls are used T/F

(vii) Stigma may be simple or divided into two or more lobes. T/F

(viii) Papaya is monoecious plant. T/F

Bougainvillea flower is an example of

(a) Incomplete flower

(b) Having a large nectary

(c) Water pollination

(d) Large colorful bracts

A flower is said to be complete when:

(a) It has the corolla and calyx

(b) It has the corolla and gynoecium

(c) It has the androecium and gynoecium

(d) It has all the four whorls.

The part of the flower that gives rise to the fruit is

(a) Sepals

(b) Petals

(c) Ovary

(d) Stamens

The part of the flower that gives rise to the seed is

(a) Ovary

(b) Placenta

(c) Ovule

(d) Pollen grain

The essential whorls of a flower are the (a) Calyx and corolla (b) Stamen and ovary (c) Calyx and epicalyx (d) Androecium and gynoecium

Match the parts in Column A with the flowers or parts of flower in Column B.

Column A Column B

(a) Polyadelphous (i) Polypetalous

(b) Pollen grains (ii) calyx, corolla

(c) Free petals (iii) Nectar

(d) Non-essential (iv) Bombax

(e) Sweet fragrant fluid (v) Pollen sac

Explain the following terms:

(a) Incomplete flower

(b) Staminate flower

(c) Pistillate flower

(d) Bisexual flower

Distinguish between the following pairs: (a) Flower and inflorescence (b) Petals and petaloid sepals (c) Polyandrous and Polyadephous androecium

Where are the following structures/parts located and what are their functions? (a) Placenta (b) Thalamus (c) Anther (d) Stigma

Why are the following describes as stated: (a) The androecium of pea flower is diadelphous (b) Ray florets of sunflower as neuters (c) Salvia sepals as petaloid

Name the different types of androecium found in flowers.

Name the different types of androecium found in flowers

Name the type of androecium found in (a) China rose (b) Bombax (c) Pea

The figure given alongside represents generalized arrangement of the different parts of a bisexual flower. Name the parts numbered 1-10.

Given alongside are two figures (A & B) of a certain part of a flower. Study the figures carefully and answer the following questions:

(a) Which major organs of a flower does the figure A represent? What is the collective term for this organ?

(b) Are the contents of the pollen sacs in B male or female?

(c) Can you state how the contents of the pollen sacs would come out?

What are bracts? State their function.

Explain the terms Monadelphous, Diadelphous and Polyadelphous. In each case name a flower possessing such an androecium