Botany and Plant Science

Double fertilization occurs in angiosperms.

4 megaspores are formed when meiosis occurs in ovules.

The meiotic division takes place in an ovule in megaspore mother cell.

A pollen tube of a flowering plant is a male gametophyte.

The non - essential organs of the flower degenerate after pollination.

Small, rounded petals is not an adaptation seen in a papilionaceous flower to ensure cross-pollination.

Yes, it is correct. In the dicotyledonous plants, the direct elongation of the radicals leads to the formation of primary root which grows inside the soil.

Yes, it is correct. It develops at the node and bears a bud in its axil.

Yes, it is correct. In a pinnately compound leaf a number of leaflets are present on a common axis, the rachis, which represents the midrib of the leaf as in neem.

Yes, it is correct. It is the arrangement of leaves on a stem and is of three types; alternate, opposite and whorled.

Yes, it is the correct answer as sieve tubes are an element of phloem. Rest all are elements of xylem.

Yes, it is correct. Meristematic tissues are found in those regions which need to grow continuously. Primary meristems appear early in the life of a plant and are responsible for the formation of primary plant body. Primary growth involves development of new parts of a plant and growth in the length of a particular part. Both apical and intercallary are primary meristems.

When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii, the arrangement is called radial such as in roots.

Yes, it is correct. In grasses, the guard cells are dumbbell shaped. The outer walls of guard cells (away from the stomatal pore) are thin and the inner walls (towards the stomatal pore) are highly thickened.

Yes, it is the correct answer. All are the functions of a stem, so the correct answer is this.