Human populations can exist at equilibrium densities in one of two ways:

1. High birth and high death rates

2. Low birth and low death rate

TLS Online TPP Program

#Id: 10204

#Unit 6. System Physiology – Plant

Cytokinin has been linked to the activation of a Cdc25- like phosphatase, whose role is to remove an inhibitory phosphate group from the Cdc2 kinase. 

Cytokinins elevate the expression of the CYCD3 gene, which encodes a D-type cyclin'

TLS Online TPP Program

#Id: 870

#Unit 13. Methods in Biology

Variants of PCR has been devised for 

a. Efficiency

b. Sequence specific amplification

c. Mutation analysis

TLS Online TPP Program

#Id: 7529

#Unit 6. System Physiology – Plant

PHYSIOLOGICAL EFFECTS OF AUXIN:

Three main guidance systems control the orientation of plant growth:

Phototropism, 

Gravitropism, 

Thigmotropism

TLS Online TPP Program

#Id: 5982

#Unit 10. Ecological Principles

In the frozen tundra of the Arctic, over 100 years may be needed to decompose 75% of the litter mass. Tree species with high lignin: nitrogen ratios were more resistant to decomposition

TLS Online TPP Program

#Id: 2019

#Unit 8. Inheritance Biology

Principle of independent assortment

Genes encoding different characteristics separate independently; applies only to genes located on different chromosomes.