A single activated rhodopsin protein activates 

~13 transducin molecules in the few seconds before the covalent bond between the opsin protein and all-trans-retinal is spontaneously cleaved

TLS Online TPP Program

#Id: 10652

#XL - R Botany

Double fertilization

TLS Online TPP Program

#Id: 9961

#XL - T Zoology

Lipid modifications of Wnt are catalyzed by the 

O-acetyltransferase Porcupine.

TLS Online TPP Program

#Id: 9443

#XL - T Zoology

Parental care

Caring of young one– Prevent from predator and stress full condition, providing. Parental care is fixed action pattern.

Parental care and clutch size is inversionally proportional.

TLS Online TPP Program

#Id: 7032

#XL - T Zoology

In the most famous example of Lamarck’s theory, giraffes must have stretched their necks to reach foliage above them, and so their necks were lengthened. The longer necks were inherited, and over the course of generations, this process was repeated, and their necks got longer and longer. 

TLS Online TPP Program

#Id: 9431

#XL - T Zoology

Bateman put several males and females together in bottles for several days. 

He concluded that the number of offspring sired by a male increased in proportion to the number of females he mated.

In contrast, the number of offspring produced by a female did not increase with the number of males she mated.