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Chapter 26: Q.17 (page 697)

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

a. bees and butterflies

b. flies

c. birds

d. wind

Short Answer

Expert verified

The correct option is (d).wind

Step by step solution

01

Step 1. Introduction

  • Pollination is the transfer of pollen grains to the stigma of female reproductive part of flowers.
  • Pollination independent on various agents like birds, insects and others.
02

Step 2. Reason for incorrect option

  • Bees and butterflies pollinated flowers are usually white in color, and they produce a very sweet fragrance. These flowers produce huge amounts of nectar, which is rewarded to the pollinators at the time of pollination.
  • Flowers pollinated by flies are pale in color, and they produce foul smell such as, rotting meat or humus in order to attract pollinators.
  • Flowers pollinated by birds are huge in size to provide a platform for the birds to land. Flowers are very bright and showy in color with nectar production.
03

Step 3. Reason for correct option

  • Pollen grains of wind-pollinated flowers are produced in abundant quantities to make atleast some pollen grains reach the stigmas of other flowers and successful pollination takes place by wind.
  • A wind-pollinated flower is known as anemophilus.

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Most popular questions from this chapter

Pollen grains develop in which structure?

a. the anther

b. the stigma

c. the filament

d. the carpel

What is biodiversity and why is it important to an ecosystem?

Figure 26.8

At what stage does the diploid zygote form?

a. when the female cone begins to bud from the tree

b. at fertilization

c. when the seeds drop from the tree

d. when the pollen tube begins to grow

The Mediterranean landscape along the sea shore is dotted with pines and cypresses. The weather is not cold, and the trees grow at sea level. What evolutionary adaptation of conifers makes them suitable to the Mediterranean climate?

Which of the following traits characterizes gymnosperms?

a. The plants carry exposed seeds on modified leaves.

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c. After fertilization, the ovary thickens and forms a fruit.

d. The gametophyte is the longest phase of the life cycle.
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