Which of the following nutrient is involved in reproduction in plants and germination of pollen grains ? a. Boron b. Calcium c. Potassium d. Sulphur

Which of the following nutrient is involved in reproduction
in plants and germination of pollen grains ?
a. Boron
b. Calcium
c. Potassium
d. Sulphur
by

1 Answer

Answer :

a. Boron
by

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Description : Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis

Last Answer : (c) (iii) (iv) (ii) (i)

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Parthenocarpic tomato fruits can be producedby (a) treating the plants with phenylmercuric acetate (b) removing androecium of flowers before pollen grains are released (c) treating the plants with low concentrations of gibberellic acid and auxins (d) raising the plants from vernalized seeds

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Factors which stimulate pollen tube germination. -Biology

Description : Factors which stimulate pollen tube germination. -Biology

Last Answer : answer:

What is the function of germ pore? (a) Emergence of radicle (b) Absorption of water for seed germination (c) Initiation of pollen tube (d) Release of male gametes

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Last Answer : (c) Initiation of pollen tube

3What is the function of germ pore?a)Initiation of pollen tubeb)Release of male gametesc)Emergence of radicled)Absorption of water for seed germination

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Before, germination of pollen, the moisture necessary for pollen hydration is provided by

Description : Before, germination of pollen, the moisture necessary for pollen hydration is provided by

Last Answer : Before, germination of pollen, the moisture necessary for pollen hydration is provided by – Stigma

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Which among the following elements increases the absorption of water and calcium in plants? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

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Which among the following elements increases the absorption of water and calcium in plants ? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Description : Which among the following elements increases the absorption of water and calcium in plants ? (1) Manganese (2) Boron (3) Copper (4) Molybdenum

Last Answer : Boron

When pollen grains are transferred to the stigma? -Biology

Description : When pollen grains are transferred to the stigma? -Biology

Last Answer : answer:

When pollen grains are transferred to the stigma? -Biology

Description : When pollen grains are transferred to the stigma? -Biology

Last Answer : answer:

What are pollen grains? -Biology

Description : What are pollen grains? -Biology

Last Answer : answer:

Where are pollen grains produced? -Biology

Description : Where are pollen grains produced? -Biology

Last Answer : answer:

What do pollen grains contain? -Biology

Description : What do pollen grains contain? -Biology

Last Answer : answer:

What are pollen grains? -Biology

Description : What are pollen grains? -Biology

Last Answer : answer:

What do pollen grains contain? -Biology

Description : What do pollen grains contain? -Biology

Last Answer : answer:

Where are pollen grains produced? -Biology

Description : Where are pollen grains produced? -Biology

Last Answer : answer:

Why were at least twenty pollen grains needed for each sugar concentration?

Description : Why were at least twenty pollen grains needed for each sugar concentration?

Last Answer : Anything less and the sample size would be too small for reliable data

How are pollen grains adapted to help plant pollinations?

Description : How are pollen grains adapted to help plant pollinations?

Last Answer : Some pollen grains have a spiky surface to help them sticky tothe bodies of insects.

What are the two ways in which pollen grains are scattered?

Description : What are the two ways in which pollen grains are scattered?

Last Answer : Pollen is scattered by the wind or by animals.

When pollen grains from flower of one plant transferred to receptive stigmas of flowers of another plant

Description : When pollen grains from flower of one plant transferred to receptive stigmas of flowers of another plant

Last Answer : Ans. Cross pollination/Allogamy

When pollen grains from an another falls on receptive stigma of the same flowers

Description : When pollen grains from an another falls on receptive stigma of the same flowers

Last Answer : Ans. Self pollination

In dicots the pollen-grains possess : (1) two germ pores (2) three germ pores (3) four germ pores (4) one germ pore

Description : In dicots the pollen-grains possess : (1) two germ pores (2) three germ pores (3) four germ pores (4) one germ pore

Last Answer : (2) three germ pores Explanation: Pollen grains of monocots have one opening, while pollen grains of dicots have three openings. Pollengrains can be monocolpate (having one germ pore called germinal furrow e.g., monocots), bicolpate (2 germ pores) and tricolpate (3 germ pores e.g., dicots).

The floral part that receives pollen grains during pollination is - (1 ovary (2) style (3) stigma (4) ovules

Description : The floral part that receives pollen grains during pollination is - (1 ovary (2) style (3) stigma (4) ovules

Last Answer : (3) stigma Explanation: The stigma is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma receives pollen at pollination and it is on the stigma that the pollen grain germinates. The style connects the stigma to the ovary.

The floral part that produces pollen grains is (1) Sepal (2) Petal (3) Anther (4) Ovary

Description : The floral part that produces pollen grains is (1) Sepal (2) Petal (3) Anther (4) Ovary

Last Answer : (3) Anther Explanation: The anther contains microsporangia. Each microsporangium contains pollen mother cells. These undergo meiosis, and produce pollen grains, which contain the male gametes (sperm). The pollen is released by the opening of the anther.

The floral part that produces pollen grains is - (1 ) Sepal (2) Petal (3) Anther (4) Ovary

Description : The floral part that produces pollen grains is - (1 ) Sepal (2) Petal (3) Anther (4) Ovary

Last Answer : (3) Anther Explanation: Anther is the apical portion of a stamen, which produces the microspores or pollen grains. An anther normally comprises four pollen sacs arranged in two groups or lobes joined by the connective tissue to the filament

The pollen grains of flowers pollinated by insects are : (1) smooth and dry (2) rough and sticky (3) rough and dry (4) large and, showy

Description : The pollen grains of flowers pollinated by insects are : (1) smooth and dry (2) rough and sticky (3) rough and dry (4) large and, showy

Last Answer : (2) rough and sticky Explanation: Pollen grains are large sticky and heavy, usually with rough surfaces so that they can readily cling onto the insects bodies. They are sticky so that pollen grains settling on them are not easily displaced.

The transfer of pollen grains from the an- ther to the stigma is called?

Description : The transfer of pollen grains from the an- ther to the stigma is called?

Last Answer : pollination

Which ones produce androgenic haploids in anther cultures? (a) Anther wall (b) Tapetal layer of anther wall (c) Connective tissue (d) Young pollen grains

Description : Which ones produce androgenic haploids in anther cultures? (a) Anther wall (b) Tapetal layer of anther wall (c) Connective tissue (d) Young pollen grains

Last Answer : (d) Young pollen grains

In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Description : In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Last Answer : (a) cellular totipotency