a)
To explain: The concept of pollen grain.
Introduction: Pollen grains are the tiny bodies in a seed plant that appears usually as a fine dust. Each pollen grain has a very minute body that varies in shape and structure and is formed in the anther (male apparatus) of seed-bearing plants. Pollens are transported by various means such as wind, insects, water,and so forth to the pistil (female structure) of the flower, wherefertilization takes place.
b)
To explain: The development of pollen grain.
Introduction: Pollen grains are the tiny bodies in a seed plant that appears usually as a fine dust. Each pollen grain has a very minute body that varies in shape and structure and is formed in the anther (male apparatus) of seed-bearing plants. Pollens are transported by various means such as wind, insects, water,and so forth to the pistil (female structure) of the flower, wherefertilization takes place.
c)
To explain: The function of pollen grain.
Introduction: Pollen grains are the tiny bodies in a seed plant that appears usually as a fine dust. Each pollen grain has a very minute body that varies in shape and structure and is formed in the anther (male apparatus) of seed-bearing plants. Pollens are transported by various means such as wind, insects, water,and so forth to the pistil (female structure) of the flower, wherefertilization takes place.
d)
To explain: How pollen was an important step toward seed plant to become dominant plants.
Introduction: Pollen grains are the tiny bodies in a seed plant that appears usually as a fine dust. Each pollen grain has a very minute body that varies in shape and structure and is formed in the anther (male apparatus) of seed-bearing plants. Pollens are transported by various means such as wind, insects, water,and so forth to the pistil (female structure) of the flower, wherefertilization takes place.
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