Plant needs and life cycles Knowledge-Based Practice

Questions

1. 1.

   In the life cycle of flowering plants, what is the primary biological function of pollination?

   • A) Breaking down stored food reserves within a dormant seed
   • B) Transporting dissolved mineral nutrients from the soil to the leaves
   • C) Dispersing mature seeds away from the parent plant to prevent overcrowding
   • D) Transferring pollen from the anther to the stigma to enable fertilization
2. 2.

   During seed germination, what serves as the primary source of energy and organic nutrients for the developing plant embryo before its first green leaves emerge above the soil?

   • A) Food reserves stored within the seed's cotyledons or endosperm
   • B) Mineral ions absorbed from the surrounding soil by developing root hairs
   • C) Sugars synthesized through early photosynthetic reactions inside the seed coat
   • D) Atmospheric carbon dioxide absorbed directly by the emerging embryonic stem
3. 3.

   In the life cycle of a flowering plant, what is the primary biological function of the fruit that develops around mature seeds?

   • A) To protect the seeds and assist in their dispersal
   • B) To absorb sunlight for the developing embryonic leaves
   • C) To absorb water and dissolved minerals from the soil
   • D) To attract pollinating insects to the reproductive organs
4. 4.

   In the life cycle of a flowering plant, which process must take place following successful pollination for ovules to develop into viable seeds?

   • A) Germination
   • B) Seed dispersal
   • C) Transpiration
   • D) Fertilization
5. 5.

   Which environmental factor is essential for a young plant to produce its own food through photosynthesis, but is typically not required for the initial germination of most seeds underground?

   • A) Water
   • B) Oxygen
   • C) Sunlight
   • D) Warmth

Answers and step-by-step solutions appear after you finish the test.