Which feature distinguishes Gnetum from other gymnosperms and aligns it more closely with angiosperms?
Absence of archegonia
Presence of vessels in the xylem
Naked ovules
Wind pollination
Related Questions
The term 'gymnosperm' literally means:
Covered seed
Naked seed
Flowering plant
Seedless plant
The cones bearing megasporophyll with ovules are called
Male strobili
Female strobili
Megasporangia
Microsporangia
The gametophyte is not an independent, free living generation in
Adiantum
Marchantia
Pinus
Polytrichum
Which of the following is NOT a characteristic of gymnosperms?
Naked seeds
Vascular tissue
Flowers
Perennial plants
Pinus belong to the class
Gnetopsida
Cycadopsida
Coniferopsida
Sphenopsida
A prokaryotic autotrophic nitrogen fixing symbiont is found in
Cycas
Cicer
Pisum
Alnus
The only living fossil, known by the name of ‘maiden hair tree’ is
Thuja
Pinus
Ginkgo
Araucaria
Which of the following statements is correct ?
Stems are usually unbranched in both Cycas and Cedrus.
Ovules are not enclosed by ovary wall in gymnosperms.
Horsetails are gymnosperms.
Selaginella is heterosporous, while Salvinia, is homosporous.
Sperm of Cycas is
Multiflagellated and very large
Small and biflagellated
Multiflagellated and small
Large and biflagellated
In gymnosperm, the leaves are well-adapted to withstand extremes of temperature, humidity and wind. What are the xeric characters in conifers?
Needle-like leaves
Thick cuticle
Sunken stomata
All of these
