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Chapter 26: Q. 16 (page 696)

White and sweet-smelling flowers with abundant nectar are probably pollinated by

a. bees and butterflies

b. flies

c. birds

d. wind

Short Answer

Expert verified

The correct option is (a). bees and butterflies.

Step by step solution

01

Step 1. Introduction

  • For reproduction to take place in flowering plants pollen grains must first reach the stigma. The transfer of the pollen grains to the stigma is known as pollination.
  • Plants have developed numerous methods for pollination and to attract pollinators, that aid in pollination.
  • Nectar is a sweet sugar-rich liquid secreted by many flowers pollinated by birds or insects.
02

Step 2. Reason for incorrect option

  • Plants pollinated by flies have flowers that have evolved to appear pale in colour and produce nasty odours such as that of rotting meat and humus to attract the flies.
  • Plants pollinated by birds have flowers, which are large enough for birds to land on. They also produce nectar and have petals that are vivid and striking in colour.
  • Plants pollinated by wind have small flowers that lack a floral fragrance. The flowers produce very little nectar and spend all their energy on pollen production to increase the chances of pollination.
03

Step 3. Reason for correct option

  • Flowers pollinated by bees and butterflies are nectar-rich, delightfully scented, or have a minty fragrance, to attract the bees and butterflies.
  • Many butterflies and bees can detect ultraviolet light, and flowers that attract these pollinators often have an ultraviolet reflectance pattern that helps them swiftly reach the flower's core.

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Most popular questions from this chapter

REVIEW QUESTIONS

Which of the following structures widens the geographic range of a species and is an agent of dispersal?

(a) seed

(b) flower

(c) leaf

(d) root

Some cycads are considered endangered species and their trade is severely restricted. Customs officials stop suspected smugglers who claim that the plants in their possession are palm trees, not cycads. How would a botanist distinguish between the two types of plants?

If a flower lacked a megasporangium, what type of gamete would not form? If the flower lacked a microsporangium, what type of gamete would not form?

What is the ploidy of the following structures: gametophyte, seed, spore, sporophyte?

a. 1n, 1n, 2n, 2n1n,1n,2n,2n

b. 1n, 2n, 1n, 2n 1n,2n,1n,2n

c. 2n, 1n, 2n, 1n 2n,1n,2n,1n

d. 2n, 2n, 1n, 1n 2n,2n,1n,1n

Abundant and powdery pollen produced by small, indistinct flowers is probably transported by:

a. bees and butterflies

b. flies

c. birds

d. wind
See all solutions

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