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Gymnosperms

Description: Gymnosperms
Number of Questions: 15
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Tags: sarbjeet Gymnosperms
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In gymnosperms, seeds are produced in

  1. pairs

  2. multiples of three

  3. aggregates

  4. cones

  5. singles


Correct Option: D
Explanation:

In gymnosperms, seeds are produced in cones.

In which of the following plants are the largest sperms found?

  1. Cycas circinalis

  2. Sequoia

  3. Pinus

  4. Cedrus

  5. Wollemia


Correct Option: A
Explanation:

The largest sperms among plants are found in Cycas circinalis.

The wood of pinus lacks

  1. tracheids

  2. vessels

  3. metaxylem

  4. protoxylem

  5. phloem


Correct Option: B
Explanation:

The wood of pinus lacks vessels.

A stamen in gymnosperm is equivalent to

  1. megasporophyll

  2. male cone

  3. microsporophyll

  4. sporophyll

  5. female cone


Correct Option: C
Explanation:

A stamen in gymnosperm is equivalent to microsporophyll.

Wood in pinus is mainly composed of

  1. vessel

  2. tracheid

  3. fibre

  4. sclereid

  5. phloem


Correct Option: B
Explanation:

Wood in pinus is mainly composed of tracheid.

Which of the following gymnosperms has male motile gametes?

  1. Cycas

  2. Pinus

  3. Ginkgo

  4. Sequoia

  5. Bowenia


Correct Option: A
Explanation:

A gymnosperm having male motile gametes is Cycas.

Cycas revoluta is also known as

  1. date palm

  2. sea palm

  3. sagopalm

  4. royal palm

  5. none of these


Correct Option: C
Explanation:

Cycas revoluta is also known as sagopalm.

Gymnosperms differ from angiosperms in having

  1. seeds

  2. ovules

  3. fruits

  4. naked ovules

  5. roots


Correct Option: D
Explanation:

Gymnosperms differ from angiosperms in having naked ovules.

Transfusion tissue serves the function of veins in

  1. cycas

  2. pinus

  3. cedrus

  4. cycads

  5. gnetum


Correct Option: A
Explanation:

Transfusion tissue serves the function of veins in cycas.

In cycas, wood is known as

  1. pycnoxylic

  2. cycads

  3. monoxylic

  4. polyxylic

  5. willow


Correct Option: D
Explanation:

In cycas, wood in known as polyxylic.

Resin and turpentine oil are obtained from

  1. cycas

  2. selaginella

  3. lycopodium

  4. pinus

  5. austrotaxus


Correct Option: D
Explanation:

Resin and turpentine oil are obtained from pinus.

The endosperm of gymnosperm is

  1. tetraploid

  2. triploid

  3. diploid

  4. haploid

  5. none of these


Correct Option: D
Explanation:

The endosperm of gymnosperm is haploid.

The embryo of cycas is

  1. polycotyledonous

  2. triploid

  3. haploid

  4. dicotyledonous

  5. tetraploid


Correct Option: D
Explanation:

The embryo of cycas is dicotyledonous.

Abundant parenchyma is found in the wood of

  1. cycas

  2. pinus

  3. pisum

  4. cedrus

  5. amentotaxus


Correct Option: A
Explanation:

Cycas is the type genus of Cycadaceae: genus of widely distributed Old World evergreen tropical trees having pinnate leaves and columnar stems covered with persistent bases of old leaves. Abundant parenchyma is found in the wood of cycas.

Which of the following, among the gymnosperms, is a living fossil?

  1. Cycas

  2. Pinus

  3. Selaginella

  4. Equisetum

  5. Agathis


Correct Option: A
Explanation:

A living fossil among the gymnosperm is cycas.

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