Question:

In Pinus, male cone bears a large number of

Updated On: Jun 23, 2024

ligules
anthers
microsporophylls
megasporophylls

Hide Solution

Verified By Collegedunia

The Correct Option is C

Solution and Explanation

Microsporophylls and megasporophylls are the leaf-like structures on which microsporangia (pollen sacs) and megasporangia are borne on the same plant of Pinus. The sporophylls are aggregated in the form of cones. [a] Male cones are smaller, also known as microstrobili (staminate strobili). [b] Female cones are larger, known as megastrobili (ovulate strobili). Each male cone consists of an elongated axis, bearing a number of spirally arranged microsporophyll. On the underside of which two microsporangia develop and get filled with microspores (pollen grains). Anther or microsporangium are the male reproductive structures of angiosperms. Microsporangium bears microspores (pollens) through microsporogenesis. The flowers of angiosperms are different in structure to the male and female cones and the sporophylls in gymnosperms. Ligule is a tongue-like membranous outgrowth, present on upper surface, near the base of the microphyllous leaf in pteridophytes (eg, Selaginella). The ligule shrinks and becomes inconspicuous in mature leaves.

Was this answer helpful?

LIST I Classes of world vegetation on the basis of temperature	LIST II Example
A	Megatherms	I	Alpine vegetation
B	Mesotherms	II	tropical rain forest
C	Microtherms	III	Coniferous forest
D	Hekistotherms	IV	Tropical deciduous forest

Questions Asked in BCECE exam

View More Questions

Concepts Used:

Plant Kingdom

The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.

Read Also: Two Kingdom Classification

Several features of Kingdom Plantae are as follows:

They are stationary. They are static and usually remain in one place only.
They have branches that expanded and green leaves due to the presence of chlorophyll.
They are an autotrophic mode of nutrition that simply means they prepare their food with the help of water, sunlight and carbon dioxide. It is further known as self-nutrition.
They indulge in photosynthesis during the day and therefore more carbon dioxide is needed during the day and at night it is released.
They secure their food in the form of starch-like algae.
They have an inelastic wall around their cell known as a cell wall comprised of cellulose.
There is an absence of the nervous system and excretory system.
Reproduction is entirely dependent on air, insects and water. Asexual and vegetative method of reproduction is noticed or detected.
The non-photosynthetic plants acquire their food through parasitism, i.e through their host like Indian pipe.

Read More: Classification of Plants

Column-I (Plant groups)		Column-II (Examples)
1.	Bryophyta	p.	Pinus
2.	Gymnosperm	q.	Adiantum
3.	Algae	r.	Sphagnum
4.	Pteridophyta	s.	Ectocarpus