Question

write about gymnosperm

Answer 1

The gymnosperms, also known as Acrogymnospermae, are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes. The term "gymnosperm" comes from the Greek composite word γυμνόσπερμος, meaning "naked seeds". The name is based on the unenclosed condition of their seeds.

Answer 2

Answer:

$\huge{\underline{\sf{\red{Gymnosperms-}}}}$

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• These are phanerogamae.

• Gymno means naked seed.

• These are non flowering plants.

• Double fertilisation occur in them.

• Herbs, shrubs, trees

• Example: Tallest tree species (Red wood tree)

• Example of gymnosperm: Pinus, cycas.

• Pinus is bisexual. [Both male and female reproductive structure is present in 1 tree].

• Gymnosperms are heterosporous.

• These are higher plants.

• When fungus associate with the roots of higher plants, they fotm symbiotic association. This association is known as mycorhiza.

• Fungus absorb N2 compound from soil and provide it to the plant and in return it takes nourishment from the plant.

• Association of N2 fixation bacteria with the roots of higher plant is known as coralloid roots.