Biology : Sexual Reproduction in flowering Plants

Which of the following are the important floral rewards to the animal pollinators?

• Colour and large size flower

• Nectar and pollen grains

• Floral fragrance and calcium crystals

• Floral fragrance and calcium crystals

• larger but to have smaller sex organs

• larger and to haver larger sex organs

• smaller and to have smaller sex organs

• smaller and to have smaller sex organs

Which one of the following statements is correct?

• Seeds of orchids have oil-rich endosperm

• Placentation in primrose is basal

• Flower of tulip is a modified shoot

• Flower of tulip is a modified shoot

Which one of the following statements is wrong?

• When pollen is shed at two-celled stage, double fertilization does not take place

• Vegetative cell is larger than generative cell

• Pollen grains in some plants remain viable for months

• Pollen grains in some plants remain viable for months

Which one of the following statements is not true?

• Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups

• Pollen grains of some plants cause severe allergies and bronchial afflictions in some people

• The flowers pollinated by flies and bats secrete foul odour to attract them

• The flowers pollinated by flies and bats secrete foul odour to attract them

Which one of the following may require pollinators, but is genetically similar to autogamy?

• Geitonogamy

• Xenogamy

• Apogamy

• Apogamy

What is the function of germ pore?

• Emergence of radicale

• Absorption of water for seed germination

• Initiation of pollen tube

• Initiation of pollen tube

Filiform apparatus is a characteristic feature of 

• egg

• synergid

• zygote

• zygote

Which one of the following statements is not true?

• Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups

• Pollen grains of some plants cause severe allergies and bronchial afflictions in some people

• The flowers pollinated by flies and bats secrete foul odour to attract them (c) Honey is made by bees by digesting

• The flowers pollinated by flies and bats secrete foul odour to attract them (c) Honey is made by bees by digesting

The coconut water and the edible part of coconut are equivalent to

• endosperm

• endocarp

• mesocarp

• mesocarp