First slide

Gymnosperms

Question

Read the features given below and identify the plant A, B and C.
A - Plants with protonemal stage in the life cycle
B - Heterosporous vascular cryptogam
C - exposed ovules and seeds

Easy

A

A: Marchantia, B: Salvinia, C: Wolffia
B

A: Funaria, B: Equisetum, C: Eucalyptus
C

A: Pteris, B: Polytrichum, C: Pinus
D

A: Sphagnum, B: Selaginella, C: Sequoia

Solution

The protonema stage is seen in life cycle of mosses (e.g., Sphagnum) and it develops directly from a spore.
Some of the pteridophytes or vascular cryptogams (e.g., Selaginella) produce two kinds of spores i.e., microspores and megaspores. This habit is known as heterospory.
In gymnosperms, ovules remain exposed both before and after fertilization due to the absence of flowers and fruits e.g., Sequoia.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App