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Test Description: Grade 6 Indicators 4,5,6,7 Grade 8 Indicators 4 , 5
Instructions: Answer all questions to get your test result.
1) Animals that reproduce sexually differ from animals that reproduce asexually in that sexually reproducing animals have
A
more genetic variation among their offspring
B
offspring that are nearly identical to their parents
C
offspring that are perfectly adapted to their parents' habitat
D
a larger number of offspring
2) When sex cells combine to produce offspring, each sex cell will contribute
A
one fourth of the normal of chromosomes.
B
half of the nomal number of chromosomes.
C
twice the normal number of chromosomes.
D
the normal number of chromosomes.
3) Single celled organisms can produce and create cells exactly like themselves without combining genes from two different parent cells. This is an example of
A
sexual reproduction
B
gamete formation
C
natural selection
D
asexual reproduction
4) Which of the following describes the advantages of asexual reproduction?
A
it allows for more genetic diversity to be passed along.
B
It increases the amount of resouces needed for a species to live.
C
It causes new types of species to be produced regularly
D
It limits the spread of detrimental characteristics in a species.
5) Salamanders can reproduce both sexually and asexually. Which is an advantage of sexual reproduction?
A
Offspring are genetically identical to the parents.
B
New combinations of traits are produced.
C
They do not need to find a mate.
D
No variations in the species will occur.
6) Sexual reproduction can cause an organism to develop a new characteristic. Which of the following new characteristics might help a lizard that lives in green, grassy areas survive
A
becoming green-colored
B
developing shorter legs
C
becoming colorblind
D
developing a longer tail
7) Cheetahs are an endangered species. Ther are fewer cheetas for mating. What genetic effects will this have on the species' chances for survival?
A
The genetic variability will not change; chances of survival will not be affected.
B
The genetic variability will increase, increasing chances of survival.
C
The genetic variability will be limited, decreasing chances of survival.
D
Since the cheetahs are endangered, they have no chance of survival.
8) According to the theory of natural selection, a species that lacks the variations necessary to adapt to a changing environment will most likely
A
fossilize
B
become extinct
C
mutate
D
become dormant
9) Rainfall in a tropical region is below average for 10 years. Which statememt best explains why insects adapted for dry conditions are now much more plentiful.
A
Biodiversity in the region has increased due to the dry conditions.
B
Insects with a high tolerance for dry conditions have migrated out of the region.
C
Natural selection has favored insect species with a high tolerance for dry conditions.
D
Natural selection has selected against insects species that are adapted for dry conditions
10) Fossils from ancient sea a shells are located in layers of rock formed out of compacted particles of sand. Why is this species of animal now extinct?
A
The local environment changed slowly enough for other species to adapt.
B
The species was unable to adapt to environmental changes.
C
The species could not exsist in compacted sand.
D
The species successfully adapted to environmental changes.
*select an answer for all questions
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