Populations grow when R0 or λ>1, populations decline when R0 or λ<1, and are at equilibrium when R0 or λ=1

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

TLS Online TPP Program

#Id: 10611

#XL - R Botany

Gametophyte 

Spores germinate to give small but multicellular, free living, mostly photosynthetic thalloid gametophytes called “Prothallus”