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Environmental Science DSST questions and answers rated A+ 2025/2026
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Environmental Science DSST questions and answers rated A+ 2025/2026
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Environmental Science DSSTProtists - ANSa numerous institution of 1 celled organisms and their many-celled spouse
and children
Plants - ANSMany-celled organisms which have mobile walls and that make their very own
meals using the solar's strength
Gymnosperms - ANSwoody plants that produce seeds, however their seeds aren't enclosed
in fruits
Angiosperms - ANSflowering vegetation that produce seeds in fruit
Invertebrates - ANSanimals that lack backbones
vertebrates - ANSanimals with backbones
The eight kingdoms of organisms - ANSArchaebactera
Eubacteria
Fungus
Protist
Gymnosperm
Angiosperm
Invertebrate
Vertebrate
Benefits of Bacteria and Fungi - ANSBacteria breaks down the remains and wastes other
organisms and returns vitamins to the soil.
Bacteria recyles mineral nutrients
Bacteria consists of nutrients for food.
Fungi adds taste to meals
Fungi (yeast) adds gas to food to make it upward push
Fungi breaks down depend and absorbs vitamins
Fungi breaks down frame parts and the bodies of dead organisms
Benefits of Protists to the Ocean - ANSAlgae is the intial sources of meals in most ocean
and freshwater ecosystems.
Why Insects are so a hit - ANSInsects have a water resistant outside skeleton. They move
fast and reproduce fast. They can fly and are small enough to hide.
Photosynthesis - ANSenergy from the sun which enters and ecosystem while a plant uses
sunlight to make sugar molecules (carbohydrates)
,Producers - ANSan organism that makes its own meals; aka autotrophs; the most effective
things that may survive without other organisms
purchasers - ANSorganisms that get their strength by consuming different organisms;
examples - bears, human beings, mice, starfish, insects ; aka heterotrophs
decomposers - ANSconsumers who get their food by way of breaking down useless
organisms
herbivore consume producers or purchasers - ANSproducers
carnivores devour producers or clients - ANSother purchasers
omnivores devour producers or consumers - ANSboth producers and clients
cell respiration - ANSthe technique of breaking down meals to yield energy
Food chain - ANSa sequence in which electricity is transferred from one organism to the
subsequent through eatting
Food net - ANSshows many feeding dating which might be possible in an surroundings. It's
extra complicated than a food chain because it includes more than one meals chains and
greater organisms.
Trophic level - ANSeach step through which strength is transferred in a food chain
Energy Pyramid - ANSa representation of the trophic degrees - largest organization
(manufacturers) on the bottom and regularly smaller as the amount of consumers decreases
definition of carbon cycle - ANSa manner by means of which carbon (an vital component of
proteins, fats, and carbohydrates) is cycled between the surroundings, land, water, and
organisms
nitrogen-fixing bacteria - ANSthe most effective organisms which could restoration
atmospheric nitrogen in chemicals these few species of micro organism
nitrogen cycle - ANSa procedure wherein nitrogen is cycled between the environment,
bacteria and other organisms
phosphorus cycle - ANSthe motion of phosphorus (enables make up the cells o dwelling
organisms) from the environment to organisms after which lower back to the surroundings.
Slowest of of all cycles and does no longer typically encompass the surroundings b/c
phosphorus rarely takes place as a gasoline.
Carbon brief-term cycle - ANS1. Producers convert carbon dioxide in the environment into
carbohydrates throughout photosynthesis
2. Customers consume producers and gains the carbon from the manufacturer
three. Carbon is then launched into the air thru cell respiratory
, carbon lengthy-time period cycle - ANS1. Carbon may be converted into carbonates - make
up the up components of bones and shells
2. Carbonate deposits may additionally form limestone (one in all the most important carbon
sink or carbon reservoirs)
3. Carbohydrates additionally may also shape fossil fuels - carbon compounds from the our
bodies of anmials once they have died
carbon results - ANSglobal warming
carbon within the water - which makes water every other carbon sink
effects on fertilizers at the nitrogen and phosphorus cycles - ANSIt can reason excess algae
inside the aquatic surroundings - known as an algal bloom - which can expend an aquatic
ecosystem of crucial nutrients such as oxygen which fish and other aquatic organisms want
to continue to exist.
Effects of burning fossil fuels - ANStoo a whole lot carbon is released into the air
what is the slowest of the 3 "cycles" - ANSphosphorus cycle - b/c it does no longer typically
consist of the surroundings because phosphorus hardly ever happens as a fuel
Ecological succession - ANSthe gradual process of trade and substitute of some of all the
species within the network.
Primary succession - ANSthe sort of succession that takes place on a surface wherein not
environment existed earlier than
Secondary succession - ANSmore comon sort of succession; occurs on a floor in which an
atmosphere has previously existed.
Pioneer species - ANSthe first organisms to colonize any newly available vicinity and start
the system of ecological succession.
Climax community - ANSa very last and stable network of organisms in a specific place
Types of Ecolgogical sucession - ANSprimary / secondary
Importance of Lichens in Primary Succession - ANSLichens - colorful, flaky patches on rocks
and trees composed of fungus and alga - phtosynthesizes and absorbs nutrients from rocks
and holds water. They ruin down the rock
secondary clients - ANSeach trophic level 10% of electricity is misplaced.
Biome - ANSa big vicinity characterized with the aid of a particular type of climate and
positive ypes of plants and animal communities
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