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GRADE 11 BIOLOGY EXAM REVIEW
QUESTIONS AND ANSWERS 2025
What are the three levels of biodiversity - correct answer- 1)
species diversity
2) genetic diversity
3) ecosystem diversity
Genes - correct answer- Units of inherited information that
determine specific characteristics or functions
Biodiversity - correct answer- The variety of life in the world
Genetic diversity - correct answer- The sum of all the different
forms of genes present in a particular species. It also helps the
survival of species
Species - correct answer- A population whose members can
breed freely in nature and produce fertile offspring
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Why do farmers grow a single type of corn? - correct answer- It
allows farmers to use the same equipment, fertilizers and
techniques on their land
Monocultures - correct answer- Genetically uniform farms, that
usually have little or no biodiversity
Species diversity - correct answer- The variety of species and
relative abundance of the species in a given area. This allows
ecosystems to survive environmental changes such as
droughts, plagues or disease outbreaks
Ecosystem diversity - correct answer- The diverse range of
habitats, the various organisms that live in the habitats and the
relationships that connect them
What kind of organisms or processes does biodiversity help
maintain? - correct answer- 1) ecosystem cycle carbon,
nitrogen and oxygen
2) micro-organisms make nutrients available and break down
toxic substances in water and soil
3) insects, bats, and other animals pollinate flowering plants
and crops
4) ecosystems clean air, purify water, control erosion,more vent
floods and modify climate
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Keystone species - correct answer- Species that have a
disproportionately large effect on the ecosystem in which they
live, such as a honeybee
What is malaria - correct answer- A deadly disease that is
spread through mosquitoes infecting people. It is called by a
microscopic parasite called plasmodium, that transmits this
disease through it's bite
Why use scientific naming for animals? - correct answer- To
reduce confusion among different languages around the world,
and to have a universal scientific name to each known species
Dichotomous key - correct answer- A tool used by scientists
and non-scientists to identify organisms with which they are
unfamiliar
What does the work "dichotomous" mean in Greek? - correct
answer- "To cut in two"
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What does a dichotomous key posses - correct answer- It
possesses a series of questions about an organism, and each
question asks users to choose between two possible
characteristics that the organism may have
Taxonomy - correct answer- The science of naming, identifying,
and classifying species
Binomial nomenclature - correct answer- A system for naming
specific species, which became the most used classification
system in biology, invented in 1750 by the Swedish botanist
Carolus Linnaeus
What are the two main parts of the binomial nomenclature -
correct answer- 1) a two-part Latin name
2) a hierarchy or ordering of the species into broader and
broader groups
Binomial - correct answer- The two-part Latin name that is part
of the binomial nomenclature
Genus - correct answer- The first part of the specie's name, to
which the species belongs
GRADE 11 BIOLOGY EXAM REVIEW
QUESTIONS AND ANSWERS 2025
What are the three levels of biodiversity - correct answer- 1)
species diversity
2) genetic diversity
3) ecosystem diversity
Genes - correct answer- Units of inherited information that
determine specific characteristics or functions
Biodiversity - correct answer- The variety of life in the world
Genetic diversity - correct answer- The sum of all the different
forms of genes present in a particular species. It also helps the
survival of species
Species - correct answer- A population whose members can
breed freely in nature and produce fertile offspring
,2 | Page
Why do farmers grow a single type of corn? - correct answer- It
allows farmers to use the same equipment, fertilizers and
techniques on their land
Monocultures - correct answer- Genetically uniform farms, that
usually have little or no biodiversity
Species diversity - correct answer- The variety of species and
relative abundance of the species in a given area. This allows
ecosystems to survive environmental changes such as
droughts, plagues or disease outbreaks
Ecosystem diversity - correct answer- The diverse range of
habitats, the various organisms that live in the habitats and the
relationships that connect them
What kind of organisms or processes does biodiversity help
maintain? - correct answer- 1) ecosystem cycle carbon,
nitrogen and oxygen
2) micro-organisms make nutrients available and break down
toxic substances in water and soil
3) insects, bats, and other animals pollinate flowering plants
and crops
4) ecosystems clean air, purify water, control erosion,more vent
floods and modify climate
,3 | Page
Keystone species - correct answer- Species that have a
disproportionately large effect on the ecosystem in which they
live, such as a honeybee
What is malaria - correct answer- A deadly disease that is
spread through mosquitoes infecting people. It is called by a
microscopic parasite called plasmodium, that transmits this
disease through it's bite
Why use scientific naming for animals? - correct answer- To
reduce confusion among different languages around the world,
and to have a universal scientific name to each known species
Dichotomous key - correct answer- A tool used by scientists
and non-scientists to identify organisms with which they are
unfamiliar
What does the work "dichotomous" mean in Greek? - correct
answer- "To cut in two"
, 4 | Page
What does a dichotomous key posses - correct answer- It
possesses a series of questions about an organism, and each
question asks users to choose between two possible
characteristics that the organism may have
Taxonomy - correct answer- The science of naming, identifying,
and classifying species
Binomial nomenclature - correct answer- A system for naming
specific species, which became the most used classification
system in biology, invented in 1750 by the Swedish botanist
Carolus Linnaeus
What are the two main parts of the binomial nomenclature -
correct answer- 1) a two-part Latin name
2) a hierarchy or ordering of the species into broader and
broader groups
Binomial - correct answer- The two-part Latin name that is part
of the binomial nomenclature
Genus - correct answer- The first part of the specie's name, to
which the species belongs
