Directional Natural selection

Directional selection favors individuals at one extreme of a phenotypic distribution that have greater reproductive success in a particular environment.

TLS Online TPP Program

#Id: 9923

#XL - T Zoology

TLS Online TPP Program

#Id: 7899

#XL - Q Biochemistry

Only 22 tRNAs are required for mitochondrial protein synthesis. The normal codon–anticodon pairing rules are relaxed in mitochondria, so that many tRNA molecules recognize any one of the four nucleotides in the third (wobble) position, allowing four codons to be recognized by a single tRNA.

TLS Online TPP Program

#Id: 9668

#XL - T Zoology

An important signal transduction protein that binds to PI 3-phosphates is protein kinase B (Akt),  a serine/threonine kinase

TLS Online TPP Program

#Id: 10716

#XL - R Botany

In monocotyledonous plants, the primary root is short lived and is replaced by a large number of roots called “Fibrous root system”

II.Fibrous root System

It develop from other than radicles

Many Small branching Roots, called fibrous root, but no large Primary root

The huge number of thread like roots increases the surface area for absorption of water and minerals

Fibrous root anchor the plant less securely

Fibrous root system

Fibrous root system found in Monocot Plants.

e.g., Maize, Paddy, Wheat, Grass, Onion

Families- Liliaceae, Poaceae etc.

TLS Online TPP Program

#Id: 10321

#XL - Q Biochemistry

The tumor down regulates the expression of class I MHC proteins