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TLS Online TPP Program

#Id: 9745

According to Optimal Defense Hypothesis, 
Young tissues not only contain the highest levels of constitutive secondary compounds, they are also more responsive to herbivory. Thus, younger leaves exhibit more robust inducible defenses to herbivores than older leaves.

#XL - R Botany #Plant Défense against Pathogen #Part B Pointers
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TLS Online TPP Program

#Id: 9180

#XL - T Zoology

Average fitness
In a species, only 1 of every 1000 seeds survives to reproductive age, and that those that survive produce an average of 3000 seeds. 
TLS Online TPP Program

#Id: 9181

#XL - T Zoology
TLS Online TPP Program

#Id: 9182

#XL - T Zoology

Selection coefficient
A related variable is the selection coefficient (s), which is the relative intensity of selection against a  genotype
TLS Online TPP Program

#Id: 9183

#XL - T Zoology

The selection gradient measures the strength of directional selection acting on a quantitative trait.
TLS Online TPP Program

#Id: 9184

#XL - T Zoology
TLS Online TPP Program

#Id: 9185

#XL - T Zoology

Proportional contribution of genotypes to population