Haldane’s rule: hybrid sterility or hybrid inviability is often limited to the heterogametic sex. 

TLS Online TPP Program

#Id: 5350

#XL - T Zoology

TLS Online TPP Program

#Id: 8363

#XL - Q Biochemistry

Myosins have 

Motor head domain

Lever-arm neck domain

Cargo-binding tail domain

TLS Online TPP Program

#Id: 8404

#XL - Q Biochemistry

The increase in Ca2+ concentration is transient because the Ca2+ is rapidly pumped back into the SR by an abundant, Ca2+ ATPase.

TLS Online TPP Program

#Id: 9805

#XL - R Botany

In higher plants the phytochrome chromophore is a linear tetrapyrrole called phytochromobilin

TLS Online TPP Program

#Id: 8534

#XL - Q Biochemistry

γ-tubulin ring complex (γ-TuRC)

nucleates assembly of a microtubule by forming a template corresponding to the (−) end.