An evolutionarily conserved family of receptor serine kinases - TGF-β receptor family

TLS Online TPP Program

#Id: 5489

#XL - T Zoology

Reproductive strategies

1.Semelparity

2.Iteroparity

Semelparity - When organisms reproduce only once during their life

Ex- insects, other invertebrates, and occurs in organisms such as salmon, bamboo grasses, and agave plants

Iteroparity - When organisms reproduce multiple times during their life.

It is common in most vertebrates and perennial plants, such as trees

TLS Online TPP Program

#Id: 5490

#XL - T Zoology

Iteroparity - Repeated reproduction at intervals throughout the life cycle. It is common in most vertebrates and perennial plants, such as trees

TLS Online TPP Program

#Id: 5491

#XL - T Zoology

Type of iteroparity

Seasonal iteroparity- Many species, such as birds or mammals, or temperate forest trees, have distinct breeding seasons Continuous iteroparity- individuals reproduce repeatedly and at any time of the year. 

TLS Online TPP Program

#Id: 5492

#XL - T Zoology

TLS Online TPP Program

#Id: 5493

#XL - T Zoology

If survival of juveniles and adult is poor - Selection favors a single act of reproduction

TLS Online TPP Program

#Id: 5494

#XL - T Zoology

If survival of juveniles is very poor and unpredictable but adult are more likely to survive - Selection favors repeated reproduction and long reproductive life.