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: 10804

#XL - R Botany

phytoalexins, antimicrobial compounds synthesized in response to bacterial or fungal infection that help limit the spread of the invading pathogen.

TLS Online TPP Program

#Id: 9458

#XL - T Zoology

JAK kinases become activated after ligand binding and

receptor dimerization

TLS Online TPP Program

#Id: 10683

#XL - R Botany

Dicot stem anomalous secondary growth occurs due to following reasons:

Anomalous position of cambium 

e.g.,Serjania sp. and Bauhinia sp.

Abnormal behavior of normal cambium

e.g., Bignonia, Aristolochia, Tinospora, Clematis etc.

Extrastelar cambium formation

e.g., Amaranthus sp. 

Interxylary phloem or included phloem

e.g., Entada sp (box bean), Combretum sp (Combretum), Strychnos sp.

TLS Online TPP Program

#Id: 10640

#XL - R Botany

Family -Malvaceae

( Cotton Family  )

Floral formula & Diagram

TLS Online TPP Program

#Id: 1314

#XL - T Zoology

GTP-binding switch proteins contains two domain-

Switch I- Thr-35

Switch II- Gly-60