An exotoxin is a toxin secreted by bacteria. It can cause damage to the host by destroying cells or disrupting normal cellular metabolism. They are highly potent and can cause major damage to the host. Exotoxins may be secreted by bacteria which

TLS Online TPP Program

#Question id: 12005

#Unit 10. Ecological Principles

Acid  rain  damage  depends  on  the  buffering  capacity  of  the  soils  in  a  given  region.  Damage  has  been  greatest where the soil layer is

TLS Online TPP Program

#Question id: 12006

#Unit 10. Ecological Principles

Nitrogen is a major environmental pollutant of groundwater in many parts of the world. What is the major cause of this nitrogen accumulation in groundwater?

TLS Online TPP Program

#Question id: 12007

#Unit 10. Ecological Principles

Sewall  Wright's  metaphor  of  evolution  on  an  adaptive  landscape describes a  population  as  occupying  a  field  of genotypes  graded  by  contours  delimiting  gene  combinations  of  equal  fitness.  The  evolutionary  mechanism  most likely to move a population consistently "uphill"  toward adaptive peaks on this landscape is

TLS Online TPP Program

#Question id: 12008

#Unit 10. Ecological Principles

When exposed to a cold environment for several weeks, many small mammals dramatically increase their capacity for heat production primarily by means of

TLS Online TPP Program

#Question id: 12009

#Unit 10. Ecological Principles

Charles Darwin discussed all of the following EXCEPT:

TLS Online TPP Program

#Question id: 12010

#Unit 10. Ecological Principles

Precursor to the northern group of continents