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7th Grade Science 4th Nine Week Study Guide
Test Description: These questions can help you prepare for the 9 week test in science.
Instructions: Answer all questions to get your test result.
1) The process in which the nucleus divides to form two identical nuclei is called
A
Mutation
B
Meiosis
C
Mitosis
D
Heredity
2) When a small exact copy of an adult organism grows from the body of the parent, it is called
A
budding
B
fission
C
regeneration
3) Human body cells have ___________ pairs of chromosomes.
A
13
B
23
C
25
D
32
4) The desert biome gets 80-180 inches of rain per year. True or False
A
True
B
False
5) The joining of an egg and a sperm from two different organisms of the same species is
A
Fertilization
B
Mitosis
C
Species
D
Genetics
6) The passing of traits from parent to offspring is
A
Heredity
B
Allele
C
Dominant
D
Genotype
7) A/an _____________ is a working unit made up of organisms interacting with each other and with non-living factors.
A
Niche
B
Ecosystem
C
Carbon Cycle
D
Biotic
8) A ____________ trait covers up other traits.
A
Recessive
B
Older
C
Dominant
D
Homozygous
9) The study of how traits are inherited through the actions of alleles is called
A
Genetics
B
Phenotype
C
Heredity
D
Genotype
10) Biotic factors include the _______ parts of an ecosystem.
A
Living
B
Inorganic
C
Nonliving
D
Quiet
11) A __________ is the outward physical appearance and behavior of an organism as a result of its genotype.
A
Phenotype
B
Genotype
C
Punnett Square
D
Allele
12) In a Punnett square, a capital (T) stands for a ________ allele.
A
Dominant
B
Recessive
C
Sex-linket
D
Heterozygous
13) Brown hair, green eyes, curly hair, and freckles are examples of
A
Recessive Traits
B
Phenotpyes
C
Genotypes
D
Genetic Disorder
14) A tool used to predict the probability of certain traits in offspring that shows the different ways alleles can combine is a
A
Punnett Square
B
Ruler
C
Scissors
D
Genetic ladder
15) The study of the relationship between (or interconnectedness) of living and nonliving things in an ecosystem is
A
Water Cycle
B
Ecology
C
Abiotic
D
Biome
16) Rocks, water, and air are examples of the nonliving parts of an ecosystem, which is/are ___________________.
A
Abiotic factors
B
The Nitrogen Cycle
C
The Hydrogen Cycle
D
Biotic factors
17) All biomes have exactly the same climates and ecosystems. True or False
A
False
B
True
18) All of the following are steps of mitosis, except
A
Metaphase
B
Prophase
C
Anaphase
D
Underphase
19) The combination Tt represents a ____________ genotype.
A
Pure Bred
B
Heterozygous
C
Phenotype
D
Homozygous
20) ______________ is the process that produces haploid sex cells and ensures that offspring have the same diploid as its parents.
A
Heredity
B
Mitosis
C
Fertilization
D
Meiosis
*select an answer for all questions
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