Biology : Sexual Reproduction in flowering Plants

What is the function of germ pore?

• Emergence of radicale

• Absorption of water for seed germination

• Initiation of pollen tube

• Initiation of pollen tube

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 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

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

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

• 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 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

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

• endosperm

• endocarp

• mesocarp

• mesocarp

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

• Geitonogamy

• Xenogamy

• Apogamy

• Apogamy

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