Question

In Pinus, male cone bears a large number of
A) Ligules
B) Anthers
C) Micro - sporophylls
D) Mega - sporophylls

Answer 1

Hint: The monoecious plant contains different flowers. Some of it may be male the others being female. Pinus is a monoecious plant that bears both male and female cones on the very same plant but on various branches.

Complete answer:
Pinus is a monoecious seed-producing plant. They are flowerless plants which produce only cones and seeds. Their seeds are not covered with the ovary. They are present on leaf-like structures called bracts. Microsporophylls and megasporophylls are leaf-like surfaces in which microsporophylls (pollen sacs) and megasporophylls are positioned on the very same Pinus plant. Sporophylls are aggregated as cones.

Male cones are smaller, also known as microstrobili, while female cones are bigger while known as megastrobili. Each male cone consists of an elongated axis with a number of spirally organised microsporophylls. On the other hand, two microsporangia grow and are packed with microspores of pollen grains. The female cone (ovulate strobilus / megasporangiate strobilus) carries two styles of scales, the bract and the ovuliferous scale, which are generally referred to as megasporophylls.

A larger part of the stamen is known as anther. It has two long and cylindrical microsporangia in its lobes. It is present only in flowering plants. The ligule is a non-reproductive vegetative organ. The ligule is present on the upper surface, at the base of the microphyllous leaf in pteridophytes. The ligule shrinks and grows inconspicuously in mature plants.

So, the correct option is C, Micro - sporophylls.

Note: In all humans, urine originates in the kidney and is discharged through the urethra. The full mechanism involved in the production and disposal of urine from the urinary bladder and through the urethra to the outside of the body is called Micturition.