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TLS Online TPP Program

#Id: 8314

Each actin subunit (globular or G-actin) is a 375-amino-acid polypeptide contains a Mg+2 ion complexed with either ATP or ADP

#XL - Q Biochemistry #MICROFILAMENTS #Part B Pointers
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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”
TLS Online TPP Program

#Id: 10612

#XL - R Botany

When gametophytes are retained within original spore case “Endosporic”
eg:  Selaginella, Isoetes, Marsilea