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WorksheetsScience review- Grade 7-Elite
Total questions: 21
Worksheet time: 12mins
Of the following, which is NOT a function of the skeletal system?
A. protects interior organs
B. gives shape and support to body
C. store minerals
D. produces vitamin D
What is detected by chemoreceptors?
A. taste
B. sound
C. Both A and D
D. odors
A heterozygous, orange-flowered plant is crossed with a homozygous, purple flowered plant. If orange is a dominant allele and purple is recessive, what colour ratio will the flowers of the offspring plants have?
A.1 purple: 3 orange
B.4 purple: 0 orange
C.2 purple: 2 orange
D.0 purple: 4 orange
Of the following, which is NOT a courtship behavior?
•birds singing
•fireflies lighting up
•frogs croaking
•dogs digging
Tadpoles survive hatching in water because they are born knowing how to swim. This is an example of (a) .
innate behavior
learned behavior
social behavior
none of the above
What is the meaning of Substitution mutation?
•one nitrogen base is replaced by another.
•one or more base pairs are added to DNA.
•one or more base pairs are removed from DNA.
•it is a permanent change in the sequence of DNA.
What is the meaning of Deletion mutation?
•one nitrogen base is replaced by another.
•one or more base pairs are added to DNA.
•one or more base pairs are removed from DNA.
•it is a permanent change in the sequence of DNA.
What is the meaning of Insertion mutation?
•one nitrogen base is replaced by another.
•one or more base pairs are added to DNA.
•one or more base pairs are removed from DNA.
•it is a permanent change in the sequence of DNA.
What is the meaning of mutation?
•one nitrogen base is replaced by another.
•one or more base pairs are added to DNA.
•one or more base pairs are removed from DNA.
•it is a permanent change in the sequence of DNA.
What is natural selection?
is the resemblance of one species to another species.
it is the process which individuals with variations that help them in their environments live longer.
it is an inherited trait that helps a species survive in its environment.
it is an adaptation that enables a species to blend in with its environment
What is adaptation?
is the resemblance of one species to another species.
it is the process which individuals with variations that help them in their environments live longer.
it is an inherited trait that helps a species survive in its environment.
it is an adaptation that enables a species to blend in with its environment
What is camouflage?
is the resemblance of one species to another species.
it is the process which individuals with variations that help them in their environments live longer.
it is an inherited trait that helps a species survive in its environment.
it is an adaptation that enables a species to blend in with its environment
What is mimicry?
is the resemblance of one species to another species.
it is the process which individuals with variations that help them in their environments live longer.
it is an inherited trait that helps a species survive in its environment.
it is an adaptation that enables a species to blend in with its environment
What are the types of adaptation?(3 correct)
Structural Adaptation
Social Adaptation
Functional Adaptation
Behavioral Adaptation
what is Structural adaptation?
involve color, shape, and other physical characteristics.
involve the way an organism behaves or acts.
involve internal body systems that affect biochemistry.
none of above
what is Behavioral adaptation?
involve color, shape, and other physical characteristics.
involve the way an organism behaves or acts.
involve internal body systems that affect biochemistry.
none of above
what is Functional adaptation?
involve color, shape, and other physical characteristics.
involve the way an organism behaves or acts.
involve internal body systems that affect biochemistry.
none of above
what is this?
phosphate
nitrogenous base
pentose sugar
nucleotide
what is this?
phosphate
nitrogenous base
pentose sugar
nucleotide
what is this?
phosphate
nitrogenous base
pentose sugar
nucleotide
what is this?
phosphate
nitrogenous base
pentose sugar
nucleotide
