HORTICULTURE

HORTICULTURE SCIENCE

PLANT BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A plant that produces seeds on the scales of cones is
A
a gymnosperm
B
an angiosperm
C
a bryophyte
D
a pterophyte
Explanation: 

Detailed explanation-1: -The term gymnosperm (“naked seeds”) represents four extant divisions of vascular plants whose ovules (seeds) are exposed on the surface of cone scales. The cone-bearing gymnosperms are among the largest and oldest living organisms in the world. They dominated the landscape about 200 million years ago.

Detailed explanation-2: -gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule-unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally, “naked seeds”) are borne in cones and are not visible until maturity.

Detailed explanation-3: -Gymnosperms are plants that have seeds but no flowers. The seeds of these plants are on cones or in cups. Most gymnosperms are evergreen. Gymnosperms include conifers, cycads and the ginkgo.

Detailed explanation-4: -From the Greek words “gymnos” meaning naked and “sperma” meaning seed, gymnosperms are a group of plants that do not produce flowers but instead produce seeds on the scales of cones or at the end of stalks forming a cone-like structure.

Detailed explanation-5: -Scale (2) – Small, often triangular shaped, leaves that are appressed to the branchlets as in juniper (Juniperus). Scale-like – With small, typically triangular-shaped leaves that are often appressed to the branchlets, as in juniper (Juniperus). ( Compare with broad-leaved and needle-like.) [ modified from W&K, p. 603]

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