Separase cleaves centromeric cohesin, triggering the onset of anaphase, releasing the sister chromatids

TLS Online TPP Program

#Id: 10605

#XL - R Botany

III. Vascular plants  (pteridophyta)

EVOLUTION OF LEAVES

spore-bearing leaves called sporophylls

In terms of size and complexity, leaves can be classified as either microphylls or megaphylls

TLS Online TPP Program

#Id: 10606

#XL - R Botany

TLS Online TPP Program

#Id: 10607

#XL - R Botany

Sporophylls and Spore Variations

Sporophylls produce clusters of sporangia known as “sori”

Groups of sporophylls form cone-like structures called “strobili” 

TLS Online TPP Program

#Id: 10608

#XL - R Botany

Homosporous and Heterosporous

Homosporous develops into a bisexual gametophyte example; ferns

TLS Online TPP Program

#Id: 10609

#XL - R Botany

Heterosporous two types of sporophylls, called- 

megasporophylls-  spores that develop into Female gametophytes

microsporophylls-  spores that develop into Male gametophytes

TLS Online TPP Program

#Id: 10610

#XL - R Botany

Modes of reproduction