Orthogenesis - “Straight-line evolution,” held that the variation that arises is directed toward fixed goals.

So that a species evolves in a predetermined direction by some kind of internal drive, without the aid of natural selection.

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: 9187

#XL - T Zoology

Positive Selection: The Spread of Beneficial Mutations

TLS Online TPP Program

#Id: 9149

#XL - T Zoology

Nonrandom Mating - Nonrandom mating are two type,

1. Positive assortative mating - Like individuals to mate.

2. Negative assortative mating - Unlike individuals to mate

TLS Online TPP Program

#Id: 9757

#XL - R Botany

Plant species produce lectins, defensive proteins that bind to carbohydrates or carbohydrate-containing proteins.

TLS Online TPP Program

#Id: 8538

#XL - Q Biochemistry

Microtubules can be stabilized by side-binding microtubule associated proteins (MAPs).