MED 001 Solved Assignment 2023-24
Understanding the Environment
MED 001 Solved
Assignment 2023-24 : All assignments are in PDF format which would be send
on email/WhatsApp (9958676204) just after payment.
Assignment Code: ASST/ MED 001/2023-24
Marks: 100
Attempt all the questions.
Q1. What are
sediments? Explain the processes involved in the formation of soils.
Sediments are small, solid particles that are transported and deposited by
wind, water, or ice. These particles can be composed of various materials,
including minerals, organic matter, and even fragments of rocks. Sediments can
accumulate in different environments such as riverbeds, lakes, oceans, and
deserts.
The formation
of soils involves a complex set of processes that transform sediments into a
medium capable of supporting plant life. Here are the key processes involved in
soil formation:
Weathering: This
is the process by which rocks and minerals are broken down into smaller
particles through physical, chemical, or biological means. Physical weathering
includes processes like freeze-thaw cycles, where water freezes in the cracks
of rocks and expands, causing the rock to break. Chemical weathering involves
the alteration of minerals through reactions with water, air, and other
substances. Biological weathering results from the activities of living
organisms, such as plant roots exerting pressure on rocks.
Transportation:
Once rocks are weathered, the resulting particles or sediments are transported
by agents like water, wind, or ice. Water is a particularly effective agent,
carrying sediments downstream and depositing them in various locations.
Deposition:
Sediments settle and accumulate in new locations through the process of
deposition. This can occur when the transporting agents lose their energy and
can no longer support the sediment load. Deposition often takes place in areas
such as riverbanks, lake bottoms, and floodplains.
Organic Matter
Accumulation: Dead plants and animals contribute to the organic matter content
of soil. Decomposition by microorganisms breaks down organic materials into
humus, which improves soil structure, fertility, and water-holding capacity.
Soil Horizon
Development: Over time, distinct layers or horizons develop in the soil
profile. The top layer, known as the O horizon, is rich in organic matter.
Below it, the A horizon, or topsoil, contains a mix of minerals, organic material,
and microorganisms. The B horizon, or subsoil, accumulates leached minerals and
materials from above. The C horizon consists of weathered parent material, and
the bedrock (unweathered rock) forms the R horizon.
Soil Profile
Formation: The combination of weathering, transportation, deposition, and
organic matter accumulation leads to the development of a soil profile. This
vertical arrangement of soil horizons reflects the history of soil formation in
a particular location.
These processes
collectively contribute to the creation of a dynamic and evolving soil system,
providing the foundation for terrestrial ecosystems and supporting plant
growth. Soil properties such as texture, structure, and fertility are
influenced by the interactions of these processes over time.
Q2. Explain with
examples how minor atmospheric gases and aerosols play important roles in the
environment.
Q3. Distinguish between the following terms giving an
example of each:
(i) Benthic and
pelagic organisms
(ii) Primary and
secondary air pollutants
(iii) Holozoic and
saprophytic nutrition
(iv) Lentic and lotic
habitats
Q4. Discuss the
characteristics and significance of bryophyte and tracheophyte.
Q5. Define the terms
food chains and food webs. Discuss in detail about detritus food chains.
Q6. (i) Distinguish
between Net Primary Productivity (NPP) and Net Community Productivity (NCP).
(ii) What do you
understand by ecosystem resistance and resilience? Give examples.
Q7. What are
biogeochemical cycles? Describe the nitrogen cycle using a neat diagram.
Q8. Write short notes on the following:
(i) Thermal properties
of water
(ii) Intra-specific
community interactions
(iii) Flow of energy
in ecosystems
(iv) Causes of land
degradation
MED 001 Solved
Assignment 2023-24 : All assignments are in PDF format which would be send
on email/WhatsApp (9958676204) just after payment.
MED 001 Solved
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