In-situ conservation means the conservation of a species in its natural habitat and the maintenance and recovery of a viable population of species in their original place.
77. Which one of the following is not included under in situ conservation?
Zoo
National Park
Wildlife Sanctuary
Biosphere Reserve
Answer.1. Zoo
Explanation:
In situ conservation is the conservation of living resources by maintaining them in the natural ecosystem in which they occur. Examples; national parks, sanctuaries, natural reserves, reserves of the biosphere, sacred grooves, etc.
Note:- Zoo is a human-made ecosystem for animals.
78. Ex-situ conservation includes
Zoo
Botanical Garden
Germplasm Bank
All of the above
Answer.4. All of the above
Explanation:
Ex-situ conservation is the technique of conservation of all levels of biological diversity outside their natural habitats through different techniques like zoos, captive breeding, aquarium, botanical garden, and gene bank.
79. Hotspots are regions of high
Rareism
Endemism
Diversity
Critically endangered population
Answer.3. Diversity
Explanation:
“Hot spots” are regions of high endemism or diversity, meaning that the species found there are not found anywhere else on Earth. Ecological hot spots tend to occur in tropical environments where species richness and biodiversity are much higher than in ecosystems closer to the poles.
80. Endemic species are
Rare species
Species localized in a specific region
Cosmopolitan in distribution
None of these
Answer.2. Species localized in a specific region
Explanation:
Endemic species are species localized in a specific region. Endemic species are mainly concentrated in the regions of North-East India, North-west Himalayas, Western Ghats, and Andaman and the Nicobar Islands. The biologists who study endemism do not consider only species but also the narrowest classification of living things.
81. Which one of the following has the maximum genetic diversity in India?
Tea
Teak
Mango
Wheat
Answer.3. Mango
Explanation:
Mango is the plant with the highest genetic diversity in India. There are about 1500 varieties of mangoes grown in our country with 1000 of them being grown commercially.
82. Which one of the following regions in India is a hotspot of biodiversity?
Sundarbans
Western Ghats
Eastern Ghats
Gangetic plains
Answer.2. Western Ghats
Explanation:
The Western Ghats is one of the world’s biodiversity hotspots with over 5,000 flowering plants, 139 mammals, 508 birds, and 179 amphibian species. At least 325 globally threatened species occur here.
83. Darwin’s finches are a good example of
Convergent evolution
Adaptive radiation
Connecting link
Industrial melanism
Answer.2. Adaptive radiation
Explanation:
Darwin’s finches are a good example of adaptive radiation.
Adaptive radiation is a rapid increase in the number of species with a common ancestor, characterized by great ecological and morphological diversity. The driving force behind it is the adaptation of organisms to new ecological contexts.
84. Which group of vertebrates comprises of the highest number of endangered species?
Mammals
Fishes
Reptiles
Birds
Answer.1. Mammals
Explanation:
Mammals have 177 endangered species which represents 3.8% of all the species and become a group of vertebrates that comprises the highest number of endangered species. Similarly, birds have 188 endangered species which represents 1.9% of all the species.
85. 5th June is observed as
World environment day
World forest day
World population day
World wildlife day
Answer.1. World environment day
Explanation:
World Environment Day is the United Nations day for encouraging worldwide awareness and action to protect our environment. 5th June is observed as world environment day.
86. The unfavorable alteration of the environment by human activities is termed as
Ecological disturbance
Ecological degradation
Pollution
Catastrophe
Answer.2. Ecological degradation
Explanation:
The unfavorable alteration of the environment by human activities is termed ecological disturbance or environmental degradation.
Environmental degradation is the deterioration of the environment through depletion of resources such as quality of air, water, and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution.
The major causes of environmental degradation are modern urbanization, industrialization, over-population growth, deforestation, etc. Environmental pollution refers to the degradation of the quality and quantity of natural resources.
87. Biogas contains mainly
Carbon dioxide
Methane
Butane
Propane
Answer.2. Methane
Explanation:
Biogas consists mainly of methane and carbon dioxide. It can also include small amounts of hydrogen sulfide, siloxanes, and some moisture.
88. The Main source of acid rain is
Sulfur dioxide
Nitrogen
Carbon dioxide
Carbon monoxide
Answer.1. Sulfur dioxide
Explanation:
The Main source of acid rain is Sulfur dioxide.
When sulfur dioxide combines with water and air, it forms sulfuric acid, which is the main component of acid rain. Acid rain can: cause deforestation. acidify waterways to the detriment of aquatic life.
89. Treated water can be disinfected by adding
Alum
Fluorine
Chlorine
Oxygen
Answer.3. Chlorine
Explanation:
Treated water can be disinfected by adding Chlorine.
Chloramines (also known as secondary disinfection) are disinfectants used to treat drinking water and they: Are most commonly formed when ammonia is added to chlorine to treat drinking water. Provide longer-lasting disinfection as the water moves through pipes to consumers.
90. The burning of fossil fuels releases a large amount of
Nitrogen
Sulfur
Carbon dioxide
Hydrogen
Answer.3. Carbon-dioxide
Explanation:
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming.
