Question

Female cone of pinus is a
A. Modified needle
B. Modified long shoot
C. Modified dwarf shoot
D. Modified scale

Answer 1

Hint: A pine is evergreen, lofty tree with spirally arranged branches which give pyramidal or conical appearance. The body of pine is divided into root, stem and needle like leaves. The stem is erect and covered with bark. Pinus is mainly used in high value carpentry items like furniture, window frames etc.

Complete answer:
A pine is any conifer in the genus Pinus of the family Pinaceae.
Pinus is the genus in the subfamily Pinoideae.
Pine is used in high class wooden work such as furniture or window frames.
Pine trees are evergreen, growing 3–80 m tall, with the majority of species reaching 15–45 m.
The smallest are Siberian dwarf pine and Potosi pinyon, and the tallest is an 81.79 m tall ponderosa pine.
Pines are mostly monoecious which means having the male and female cones on the same tree.
The male cones are small, typically 1–5 cm long, and only present for a short period of time that falls as soon as they have shed their pollen.
Male cones are modified dwarf shoots.
The female cones take 1.5–3 years to mature after pollination, with actual fertilization delayed one year.
At maturity the female cones are 3–60 cm long.
Each cone has numerous spirally arranged scales, with two seeds on each fertile scale; the scales at the base and tip of the cone are small and sterile, without seeds.
Female cone is modified for long shoots.

So, the correct option is option B. Modified long shoot.

Note: The male cone also known as staminate /microsporangiate strobilus bears spirally arranged microsporophyll on the central axis.
Each microsporophyll carries two microsporangia on the underside.
Female cone of the pinus is larger than male cone of the pinus.
The male cone produces tiny amounts of pollen grains that become the male gametophyte.