An integrin molecule is composed of two noncovalently associated transmembrane glycoprotein subunits called α and β.

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#Id: 5496

#XL - T Zoology

k-selected species

Stable populations adapted to exist at or near the carrying capacity, K

Grow slowly and reach reproductive age late, having to devote much energy to growth and maintenance

K-selected species like a tree grows large and outcompeting  other  species

Such trees have a long-life span and produce seeds repeatedly when mature

These seeds are bigger

Nonrandom matting

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#Id: 9049

#XL - T Zoology

Three principal classes of G PCR that bind their ligand in different ways:

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#Id: 10584

#XL - R Botany

Reproduction

Vegetative reproduction-   by fragmentation

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#Id: 10770

#XL - R Botany

Ovules Can Be arranged Within an ovary in a Variety of ways

Parietal placentation

Axile placentation

 Basal placentation

Free-central placentation

Marginal placentation

Parietal placentation

Parietal placentation occurs in the brassicaceae family 

Axile placentation(or central-angular)

This type of placentation is seen in solanaceae, rutaceae and liliaceae families

Basal placentation

Basal placentation can be found in the Asteraceae and Poaceae family

Free central placentation

A type of placenta structure in an ovary, in which the ovules cluster freely around a columnlike central placenta which is attached at the base of the ovary.

examples are dianthus and primrose

Marginal placentation

Marginal placentation is a feature of the Fabaceae/Leguminosae family.

Examples of marginal placentation are plants of the legume family (pod plants), like pea and beans.

               

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#Id: 9474

#XL - T Zoology

SHP1 

Binding of an SH2 domain to a phosphotyrosine in the activated receptor unmasks its phosphatase catalytic site