Environmental Science In Agricultural - Study Mode

[#106] Which of the following kingdom contains species that can convert ammonia to nitrite and nitrite to nitrate?
Correct Answer

(A) Monera

Explanation

Solution: Monera kingdom contains species that can convert ammonia to nitrite and nitrite to nitrate. Monera "single" is a biological kingdom that is made up of prokaryotes. As such, it is composed of single-celled organisms that lack a nucleus. Nitrobacter plays an important role in the nitrogen cycle by oxidizing nitrite into nitrate in soil and marine systems. Nitrobacter uses energy from the oxidation of nitrite ions, NO 2 - , into nitrate ions, NO 3 - , to fulfill their energy needs. Nitrobacter fixes carbon dioxide via the Calvin cycle for its carbon requirements. Nitrobacter belongs to the Alphaproteobacteria class of the Pseudomonadota.

[#107] The precipitation reaching the ground distribute in different ways as 1. Evaporate and reach the atmosphere 2. Infiltrate the soil 3. Detained in catchment area 4. Become a form of ran-off Select the correct answer:
Correct Answer

(D) All of these

Explanation

Solution: The precipitation reaching the ground distribute in different ways as all of them are given in the options. 1. Evaporate and reach the atmosphere 2. Infiltrate the soil 3. Detained in the catchment area 4. Become a form of ran-off Precipitation is any product of the condensation of atmospheric water vapour that falls from clouds due to gravitational pull. Precipitation occurs when a portion of the atmosphere becomes saturated with water vapour so that the water condenses and "precipitates" or falls.

[#108] The criteria for the selection of species under ex-situ conservation is/are
Correct Answer

(A) Vulnerability of the species to extinction

Explanation

Solution: The criteria for the selection of species under ex-situ conservation is Vulnerability of the species to extinction. Ex-situ conservation means, "off-site conservation". It is the process of protecting an endangered species, variety or breed, of plant or animal outside its natural habitat. Ex-situ management can occur within or outside a species' natural geographic range. Individuals maintained ex-situ exist outside an ecological niche. Ex-situ conservation, while helpful in humankind's efforts to sustain and protect our environment, is rarely enough to save a species from extinction.

[#109] The factors that must be considered in the on-site storage of solid wastes is/are
Correct Answer

(D) All of these

Explanation

Solution: The factors that must be considered in the on-site storage of solid wastes are type of container, Location of container and Public health and collection. Onsite storage means the temporary collection of waste at the household level. Waste must be stored in proper containers, where it should be located after segregation for health and proper hygine. Waste handling depends on types of waste materials separated for reuse and recycling.

[#110] Best source of renewable energy is
Correct Answer

(D) Trees

Explanation

Solution: The best source of renewable energy is Trees. Renewable energy is energy from renewable resources that are naturally replenished on a human timescale. Renewable resources include sunlight, wind, the movement of water, and geothermal heat. Plant energy is produced by crops specifically grown for use as fuel that offer high biomass output per hectare with low input energy.