7th Grade Final Exam Question Preview (ID: 40361)


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An organism's habitat must provide all of the following except
a) predators
b) food
c) water
d) shelter

To produce their own food, algae and plants use the abiotic factors sunlight, carbon dioxide, and
a) water
b) soil
c) bacteria
d) salt

Cool air tends to be
a) more dense and flow under warm air
b) less dense and flow over warm air
c) mix easily with warm air masses
d) be lifted up by more dense warm air

What does the notation TT mean to geneticists?
a) two dominant alleles
b) two recessive alleles
c) two homozygous alleles
d) no alleles

A mutation is
a) any change in a gene or chromosome
b) any change which is helpful to an organism
c) any change which hurts an organism
d) any change in the phenotype of a cell

The behaviors and physical characteristics of a species that allow them to survive successfully in a changing ecosystem are called
a) adaptations
b) limiting factors
c) biotic resources
d) abiotic resources

A group of land ecosystems with similar climates and organisms is called a(n)
a) biome
b) ecosystem
c) biosphere
d) tundra

A carrier is a person who has
a) one recessive and one dominant allele for a trait
b) two recessive alleles
c) two dominant alleles
d) 3 dominant alleles

Consumers that eat both plants and animals are called
a) omnivores
b) scavengers
c) carnivores
d) herbivores

The greenhouse effect is
a) the process by which gases hold heat in the atmosphere
b) the absorption of energy by clouds
c) a gradual increase in the temperature of the atmosphere
d) the reflection of solar energy into the atmosphere

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