I. interaction with the environment
II. Habitat
III. Place in the food chain
A. I, II and III
B. I and II
C. I and III
D. II and III
Ans: A. I, II and III
- An ecological niche is the role and position a species has its
environmental when lives; how it meets for food and shelter, how it survives,
and how it reproduces. A species’ niche all of its interaction with the biotic
and abiotic factors of environment.
2. What happens when two organism occupy the same ecological
niche?
A. Both organism will die
B. It will result to mutualism
C. Competition will never be
intensive
D. They will connive to widen their habitat
Ans: C. Competition will never be
intensive
- According to the competitive exclusion principle, no two species
can occupy the same ecological niche. The two species will compete for the
limited resources that they both need. They inevitably compete for the
dominance of this niche until one of them brings about the extinction of the
other.
3. In which biome can you see animals that burrow or seek
shelter during the day become active at night?
A. Deciduous forest
B. Desert
C. Savanna
D. Taiga
Ans: B. Desert
- The biological processes of animal tissue can function only
within narrow temperature. When this range. When this range is exceed , the
animals dies. Due to extreme temperature in the dessert, many animals
(especially mammals and reptiles) are
crepuscular that is they are active only at dusk and again at dawn. Many
animals are completely nocturnal restricting all their activities to the cooler
temperature of the night. Bats many snakes, most rodents and some larger
mammals like foxes and shrunk, are nocturnal, sleeping in a cool den, cave or burrow by day. Some
smaller deserts animals burrow below the surface of the soil or sand to escape
the high temperature at the desserts surface. These include many mammals,
reptiles insects and all desert amphibians. Rodents may be plug the entrance to
their burrows to keep out hot, desiccating air.
4. Which biome is the coolest?
A. Temperature coniferous forest
B. Temperature grassland
C. Tropical rainforest
D. Tundra
- The tundra is the coldest and the driest of all biomes on Earth.
Temperature ventures above freezing for moments each year. The tundra covers
about one fifth of the land on earth. The word of tundra comes from a Finnish
words that means treeless plain, which is a circle that surrounds the north
pole.
5. Why is the Philippines classified as a tropical rainforest?
I. located close to the equator
II. Surrounded by vast oceans
III. Rich in second growth forest
IV. Receivesa high rainfall
A. I and IV
B. II and IV
C. I, II and III
D. I, II and IV
Ans: D. I, II and IV
- Tropical rainforest are defined by the fact they warm wet
year-rounded just like the Philippines. Tropical rainforest are found in the
world’s hottest and wettest areas. Namely those closest to the equator. They
receive a high rainfall. The combination of lots of moisture and consistent
year-round warm weather makes tropical rainforest particularly lush areas of
plant life.
6. What is being shown in the renewal of a forest after a fire?
A. Autogenic succession
B. Allogenic succession
C. Primary succession
D. Secondary succession
Ans: D. Secondary succession
- There are two different types of succession: primary succession
occurs in essentially lifeless regions in which the soil is incapable of
sustaining life as a result of such factors as lava flows, newly formed sand
dunes, or rocks left from a retreating glacier. Secondary succession refers to
the concept of an ecosystem reviving itself after all or a portion has been
destroyed. The renewal of a forest after a fire: Th fire itself destroy a
majority of different types of trees and plant life. Because seeds and roots
and other plants and tree parts remain in and on the soil, gradually the plants
and trees begin to grow again and eventually return to the state of the
original ecosystem.
7. What is the initial establishment of a plant community in a
new area?
A. Aggregation
B. Ecesis
C. Invasion
D. Nudation
Ans: B. Ecesis
- Ecesis is the initial establishment of plan community. It also
known as colorization. In this stage, the early colonizing species proliferate
abundantly through germination growth and reproduction. Aggregation is the
increase in a population of the species which has become established in the
area. Nudation is the development of a bare site uninhabited by any organisms.
The process of invasion helps the arrival of seeds spore from establishment of
species.
8. Which of the following is an example of primary succession?
A. A barrel land
B. Formation of new island
C. Evolution of a new animal species
D. Renewal of a crop after harvesting
Ans: B. Formation of new island
- Primary succession is a charge in vegetation which occurs on
previously unvegetated terrain. Examples of where primary succession may take
place include the formation of new islands, on new volcanic rock, and on land
formed glacial retreats.
9. Development that meets the needs of the present without
comprising the ability of future generations to meet their own needs aptly
describes ________.
A. ecological development
B. environment integrity
C. environmental potential
D. sustainable development
Ans: D. sustainable development
- Sustainable development is development that needs of present
without compromising the ability of future generations to meet their own needs.
The definition of sustainability may taken further and it is widely accepted
that to achieve sustainability we must balance economic, environmental and
social factors in equal harmony. This implies that we need to look after our planet,
our resources and our people to ensure that we can live in a sustainable manner
and that we can hand down our planet to our children and our grandchildren to
live true sustainability.
10. Which of the following environmental conditions been blamed for
the usual occurrence of fish skills in our lakes?
A. Acid rain
B. Atmospheric pollution
C. Euthrophication
D. Silting of lakes
Ans: C. Euthrophication
- Eutrophication is the excessive richness of nutrients in a lake
or other body of water frequently due to runoff from the land, which causes a
dense growth of plant life and death of animal life just like fish kill from
lack of oxygen.
11. Which of the following factors are facts about carbon?
I. It can exist in amorphous state.
II. It forms strong ionic bonds with a variety of elements
III. It has a unique ability to bond to itself in long chains
IV. It has a very low its melting point and sublimation point
A. I and II
B. I and III
C. II and III
D. I, III, and IV
Ans: B. I and III
- Carbon can exist in amorphous state. It means it lacks
crystalline structure or a distinct shape. It has the special ability to bond
to itself in long chains. The greater the number of carbons atoms in a molecule
the more ways there are to connect these atoms in different arrangements.
Carbon forms a strong covalent bonds with a variety of elements like hydrogen,
nitrogen, oxygen and the halogens. Carbon has the highest melting/sublimation point
of all elements and, in the other form of diamond has the highest thermal
conducting of any element.
12. Carbon can exist with several different structures and so its
atoms area arranged different. What is this unique property of carbon?
A. Allotropy
B. Implementrabilty
C. Viscosity
D. Volatility
Ans: A. Allotropy
- Allotrophy is the property of carbon to exist in two or more
different forms, in the same physical state, known as allostropes. Carbon is
capable of forming many allotropes due to its valency. The common crystalline
allotrophes area graphite, diamond and fullerenes impenetrability is the quality of matter
whereby two bodies cannot occupy the same space at the same time. Viscosity is
the resistance to flow. Volatility is the abilty to evaporate easily.
13. Which carbon is used as pigment in black ink/s?
A. Carbon black
B. Charcoal
C. Coke
D. Graphite
Ans: A. Carbon black
- Carbon black is formed when hydrocarbons such as methane are
heated in the presence of very little amount of oxygen. It is used as the black
pigment in printing ink. Charcoal is formed when wood is heated intense in the
absence of air. Activated charcoal is commonly used in filters to remove
undesirable odors. Coke is a good reducing agent in metallurgical processes.
Graphite is used for pencil tips, high temperature crucibles, dry cells,
electrodes and as lubricant.
14. Water can be described as an amphoteric molecule. What does
this mean?
A. It is tasteless and odorless
B. It can react both as acid or base
C. it can exist as solid, liquid or gas
D. It can dissolves many substance found in nature
Ans: B. It can react both as acid or base
- The prefix of the word “amphoteric” is derived from a Greek
prefix amphi-, which means both. An amphoteric substance is a substance that
has ability to act either as an acid or a base.
15. What is the state of matter of water at 25 degrees Celsius?
A. Gas
B. Liquid
C. Plasma
D. Solid
Ans: B.
- Water exist in the liquid, solid and gaseous states. It is in
dynamic equilibrium between the liquid and gas states at 0 degrees Celsius and
1 atm pressure. At room temperature
(approximately 25 degree Celsius), it is a tasteless, odorless and colorless
liquid.
16. Water is a polar molecule. What does this mean?
A. Water is a molecule with no charge
B. It has identical charges at opposites ends
C. It has opposites charges at opposites ends
D. It has unequal number of protons and electrons
Ans: C. It has opposites charges at opposites ends
- Because oxygen has a higher electronegativity than hydrogen,
water has a partial negative charge near the oxygen due to the unshared pair of
electrons and partial positive charges near the hydrogen atoms. This charge
difference causes water molecules to be attracted to each other (the relatively
positive areas are attracted to the relatively negative areas) as well as o
other polar molecules to dissolve in water is due polarity.
17. Which formula represents a saturated hydrocarbon?
A.C₂H₂
B. C₂H₄
C. C₃H₆
D. C₃H₈
Ans: D. C₃H₈
- Hydrocarbons in which all the carbon-carbon bonds area called
alkanes. Alkanes are saturated by hydrocarbons. This means that they contain
only carbon and hydrogen atoms bonded by single bonds only. The general formula
for an alkane is Cn H₂n̟₂. In this this formula, n is the number of carbons
atom n in the molecule for example there are 3 carbon atoms then the number of
hydrogen atoms shall be 2(3) = 6+2 = 8.
18. Among the members of the alkane family, which is similar?
A. Condensed formula
B. General formula
C. Molecular formula
D. Structural formula
Ans: B. General formula
- The general formula for all alkanes
is Cn H₂n+2. The molecular formula is the actual ratio of atoms to one another
in a molecule. Propane and butane are members of the alkane family. However they differ in molecular
formula. Propane is C₃ H₈ while butane is C₄ H₁₀ atoms. A condensed formula is
a simplification of the structural formula. The condensed formula of propane is
CH₃CH₂CH₃ while butane CH₃CH₂CH₂CH₃
19. Which of the following is an organic compound?
A. Lime (CaO)
B. Methane (CH₄)
C. Salt (NaCI)
D. Sulfuric acid (H₂SO₄)
- Usually, organic compounds contain carbon. Among all the choices
only members contain carbon. However there are also carbon containing inorganic
compounds like carbon monoxide and carbon dioxide because they possess
properties that are similar to inorganic compounds.
20. A liquid is dissolve in water and was found out to have a
general formula of R-OH. What could be
the name of the liquid?
A. Methane
B. Methanol
C. Mechanic acid
D. Methyl methanoate
Ans: B. Methanol
- Alchohol contain the hydroxyl (OH) as the functional group and
are considered derivates of water. The OH bond is polar, so alcohols are
soluble in polar solvents like water. Simple alchohol are named by changing the
last letter in the name of the corresponding hydrocarbon to – ol. For instance,
methane becomes methanol.
No comments:
Post a Comment