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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

Which of the following traits characterizes gymnosperms?

a. The plants carry exposed seeds on modified leaves.

b. Reproductive structures are located in a flower.

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

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

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

Pollen grains develop in which structure?

a. the anther

b. the stigma

c. the filament

d. the carpel

In the course of double fertilization, one sperm cell fuses with the egg and the second one fuses with ________.

a. the synergids

b. the polar nuclei of the center cell

c. the egg as well

d. the antipodal cells

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?
See all solutions

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