Which one of the following is not a correct statement ?

Botanical gardens have collection of living plants for reference.
A museum has collection of photographs of plants and animals
Key is taxonomic aid for identification of specimens.
Herbarium houses dried, pressed and preserved plants pecimens

Solution

Museums have collections of preserved plant and animal specimens for study and reference

Angiosperms have dominated the land flora primarily because of their

power of adaptability in diverse habitat
property of producing large number of seeds
nature of self pollination
domestication by man

Solution

Angiosperms have adapted themselves to all kinds of habitat - terrestial, aquatic, tropical, deciduous and alpine.Self pollination is seen in very few angiosperms.Production of large number of seeds ensure that at least some will germinate. Not all plants have been domesticated by man

Species are considered as

real units of classification devised by taxonomists
real basic units of classification
the lowest units of classification
artificial concept of human mind which cannot be defined in absolute terms

In five kingdom system, the main basis of classification is

structure of nucleus
mode of nutrition
structure of cell wall
asexual reproduction

Solution

The five kingdom classification is a mode of classification based on the following criteria.
• Complexity of cell structure
• Complexity of body structure
• Modes of nutrition
• Ecological lifestyles
• Phylogenetic relationship

What is true for photolithotrops?

Obtain energy from radiations and hydrogen from organic compounds
Obtain energy from radiations and hydrogen from inorganic compounds
Obtain energy from organic compounds
Obtain energy from inorganic compounds

Which of the following is less general in characters as compared to genus?

Species
Division
Class
Family

Solution

Species is the lowest taxonomic category. Class is a category made of one or more related orders possessing similar correlated characters, Family is composed of one to many related genera. Division comprises of several related classes.

Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described?

Musca domestica - The common house lizard, a reptile.
Plasmodium falciparum –A protozoan pathogen causing the most serious type of malaria.
Felis tigris - The Indian tiger, well protected in Gir forests.
E.coli - Full name Entamoeba coli,a commonly occurring bacterium in human intestine.

Which one of the following animals is correctly matched with its particular named taxonomic category ?

Tiger - tigris, the species
Cuttle fish - mollusca, a class
Humans - primata, the family
Housefly - musca, an order

Solution

Tiger and tigris both are from same genus with particular taxonomic category.

Select the correct statement from the following?

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
Mutations are random and directional
Darwinian variations are small and direction less

Solution

To survive in a particular environment, an organism need to adapt in that environment. If the organism becomes success in adapting them that organism is selected by nature.

Which of the following is not true for a species?

Members of a species can interbreed.
Gene flow does not occur between the populations of a species.
Each species is reproductively isolated from every other species.
Variations occur among members of a species

Solution

Gene flow is the spread of genes through populations as effected by movements of individual and their propagules,e.g. seeds spores etc. Gene flow ensures that all populations of a given species share a common gene pool. i.e. it reduces difference between populations. The interruption of gene flow between populations is apre-requisite for the formation of new species.

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