-
Engineering and Architecture
Exams
Colleges
Predictors
Resources
-
Computer Application and IT
Quick Links
Colleges
-
Pharmacy
Colleges
Resources
-
Hospitality and Tourism
Colleges
Resources
Diploma Colleges
-
Competition
Other Exams
Resources
-
School
Exams
Top Schools
Products & Resources
-
Study Abroad
Top Countries
Resources
-
Arts, Commerce & Sciences
Exams
Colleges
Upcoming Events
Resources
-
Management and Business Administration
Colleges & Courses
Predictors
-
Learn
Law Preparation
MBA Preparation
Engineering Preparation
Medical Preparation
-
Online Courses and Certifications
Top Streams
Specializations
- Digital Marketing Certification Courses
- Cyber Security Certification Courses
- Artificial Intelligence Certification Courses
- Business Analytics Certification Courses
- Data Science Certification Courses
- Cloud Computing Certification Courses
- Machine Learning Certification Courses
- View All Certification Courses
Resources
-
Medicine and Allied Sciences
Colleges
Predictors
Resources
-
Law
Resources
Colleges
-
Animation and Design
Exams
Predictors & Articles
Colleges
Resources
-
Media, Mass Communication and Journalism
Colleges
Resources
-
Finance & Accounts
Top Courses & Careers
Colleges
Get Answers to all your Questions
- #Diversity in Living World
- #National Eligilibility Cum Entrance Test
- #National Eligibility Cum Entrance Test
- #Class 11
- #Medical
- #Biology
Which of the following class does not belong to gymnosperms ?
Cycadopsida
Coniferopsida
Ginkgopsida
Sphenopsida
Answers (1)
Classification of Gymnosperms -
Gymnosperms are divided into four groups:
1-Cycadopsida- Wood is manoxylic, Siphonogamous fertilization, male gametes are winged, they are commonly called cycads. E.g Cycas
2-Coniferopsida- commonly called conifers, e.g. Pinus. Wood is pycnoxylic, small ephemeral cones formed in groups, large and perennial female cones, siphonogamous fertilization, male gametes non-motile.
3-Ginkgopsida- represented by Ginkgo, also known as maidenhair tree. It is known as a living fossil. It is the only one living organism in this group, it has leathery and fan-shaped leaves, The veins are dichotomously branched, male gametes are motile and multiflagellate.
4-Gnetopsida- includes Gnetum, Ephedra, Welwitschia. Vessels are present in secondary xylem, orthotropous ovules with long tubular micropyle are present, resin canals absent.
-
Sphenopsida belongs to pteridophytes.
NEET 2024 Most scoring concepts
- Just Study 32% of the NEET syllabus and Score up to 100% marks
