Multiple Choice QuestionsWhat is true about the isolated small tribal populations?
There is a decline in population as boys marry girls only from their own tribe
Hereditary diseases like colour blindness do not spread in the isolated population
Wrestlers who develop strong body muscles in their lifetime pass this character on their progeny
Wrestlers who develop strong body muscles in their lifetime pass this character on their progeny
Consider the following statements concerning food chains
A) removal of 80% tigers from an area resulted in greatly increased growth of vegetation
B) removal of most of the carnivores resulted in an increased population of deers
C) length of food chains is generally limited to 3-4 trophic levels due to energy loss
D) the length of food chains may vary from 2 to 8 trophic level
Which two of the above statements are correct?
B and C
C and D
A and D
A and D
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
S-shaped or sigmoid growth of this insect
The food plants mature and die at the end of the rainy season
Its population growth curve is of J-type
Its population growth curve is of J-type
Geometric representation of age structure is a characteristic of
Biotic community
Population
Landscape
Landscape
Select the correct statement from the following:
Darwinian variations are small and directionless
Fitness is the end result of the ability to adapt and gets selected by nature
All mammals except whales and camels have seven cervical vertebrae
All mammals except whales and camels have seven cervical vertebrae
Two plants can be conclusively said to belong to the same species if they
can reproduce freely with each other and form seeds
have more than 90 per cent similar genes
look similar and possess identical secondary metabolites
look similar and possess identical secondary metabolites
Probiotics are
safe antibiotics
cancer inducing microbes
new kind of food allergens
new kind of food allergens
Which one of the following pairs of organisms are exotic species introduced in India?
ficus religiosa , lantana camara
lantana camara, water hyacinth
water hyacinth, prosopis cinereria
water hyacinth, prosopis cinereria
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for
responsiveness to touch
interaction with the environment and progressive evolution
reproduction
reproduction
If the mean and the median pertaining to a certain character of a population are of the same value, which of the following is most likely to occur
a normal distribution
a bi-modal distribution
a T-shaped curve
a T-shaped curve
