genetics, evolution of life & ecological biodiversity - Category wise Question and Answer Practice Test with Solutions
genetics, evolution of life & ecological biodiversity PRACTICE TEST [5 - EXERCISES]
set 1
set 2
set 3
set 4
set 5
Question : 1
From a cross AABb x aaBb, the genotypes AaBB : AaBb : Aabb : aabb will be obtained in the following ratio
a) 1: 2 : 1 : 0
b) 0 : 3 : 1 : 0
c) 1: 1 : 1 : 1
d) 1: 1 : 1 : 0
Answer »Answer: (a)
AABb × aaBb
AB | Ab | AB | Ab | |
aB | AaBB | AaBb | AaBB | AaBb |
aB | AaBb | Aabb | AaBb | Aabb |
aB | AaBB | AaBb | AaBB | AaBb |
ab | AaBb | Aabb | AaBb | Aabb |
AaBB | : | AaBb | : | Aabb | : | aabb |
4 | : | 8 | : | 4 | : | 0 |
AaBB = 1; AaBb = 2; Aabb = 1; aabb = 0
Question : 3
ICBN stands for
a) Indian Code of Botanical Nomenclature
b) International Code of Botanical Nomenclature
c) International Congress of Biological Names
d) Indian Congress of Biological Names.
Answer »Answer: (b)
ICBN (International Code of Botanical Nomenclature) - It is one of the codes of nomenclature which is independent of zoological and bacteriological nomenclature.
The code applies equally to names of taxonomic groups treated as plants whether or not these groups were originally so treated.
Question : 4
Energy is maximum in ................ trophic level and minimum in the ............... trophic level
a) top, Bottom
b) producer, consumer
c) consumer, decomposer
d) bottom, Top
Answer »Answer: (d)
A. Producers are the green plants which synthesise their own food using sunlight.
B. Herbivores are primary consumers who feed on producers.
C. Carnivores are secondary consumers who feed primary consumers.
D. Top carnivores are tertiary consumers who feed on other carnivores.
Maximum energy is stored in the trophic levels of producers as they synthesise their own food. They occupy the lowest trophic level and energy is transferred from them to higher subsequent trophic levels. As the energy decreases each time it is transferred to the next higher trophic level, the lowest trophic level i.e. producers, have maximum energy.
Question : 5
The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as:
a) Pollution
b) Accumulation
c) Eutrophication
d) Bio magnification
Answer »Answer: (d)
Non-biodegradable substances like pesticide residues cannot be digested or consumed by organisms, so, they are just passed on to organisms of the next trophic level along with food. These non-biodegradable residues keep on accumulating.
The higher the trophic level an organism occupies in the food chain higher will be the accumulation of non-biodegradable pesticide residues.
This phenomenon is called biomagnification. So, the correct answer is 'Biomagnification'
IMPORTANT general science mcq EXERCISES
set 1 Online Quiz
Click to Start..general science mcq CATEGORIES
-
» Measurement And SI Units
-
» Measuring Devices And Scales
-
» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
-
» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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