Biology STAAR Review

Quiz
•
Science
•
9th Grade
•
Hard
+8
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After a wheat field is cleared, wild grasses and weeds begin growing. This process is considered —
primary succession because pioneer species appear
primary succession because there are no large trees
secondary succession because soil is already present
secondary succession because the field contains inorganic matter
Answer explanation
After a wheat field is cleared, wild grasses and weeds begin growing due to secondary succession, since soil is already present. Primary succession can only occur in areas where life was not previously present e.g., newly formed volcanic rock.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
During an extended dry season in an area, the majority of the ground cover dried up. Which description best explains how this would affect the ecosystem in that area?
The ecosystem would become less stable because the ranges of many organisms would expand and overlap.
The ecosystem would become more stable because there would be less competition among canopy plants.
The ecosystem would become less stable because less energy would be available to it from the decrease in producers.
The ecosystem would become more stable because organisms in higher trophic levels would be able to find prey more easily.
Answer explanation
The ecosystem would become less stable if most of the ground cover dried up. Less energy would be available to the ecosystem due to a decrease in the number of producers.
Tags
NGSS.MS-LS2-1
NGSS.MS-LS2-3
NGSS.MS-LS2-4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For an enzyme to be able to catalyze a reaction, the active site must -
cause the enzyme to be destroyed in the reaction
increase the activation energy level
be occupied by an inhibitor
have a complementary shape to the substrate
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An illustration of how a particular DNA mutation will most likely affect the polypeptide produced is shown. What type of mutation is illustrated?
insertion
translocation
substitution
deletion
Answer explanation
The original strand has a GTA coding for His. The mutated strand has a GGA which codes for Pro instead. The T got switched for a G, so this is a substitution.
Tags
NGSS.MS-LS3-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Based on the cladogram, the ancestral species most likely had...
a vertebral column
a vertebral column and hair
sharp teeth and retractable claws
ability to purr
Answer explanation
Ancestral = oldest species that gives rise to the rest of the species. The ancestral species would lie to the far left, where only the vertebral column is.
Tags
NGSS.MS-LS4-1
NGSS.MS-LS4-2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Snowshoe hares change coat color during the year. In the summer, when there is no snow on the ground, their coat is brown. In the winter when there is snow, their coat is white. Which describes the genetic basis for seasonal changes in coat color?
The snow causes mutations in the genes
The genes are regulated by hormone signals that are altered by changes in the environment
Sunlight causes cancer cells to develop
The genes are deleted during the summer
Tags
NGSS.MS-LS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When multiple transitional fossils are found in many rock layers, they provide evidence of -
seasonal variation in the diet of a species
gradual change of a species over time
DNA functioning as the genetic material of organisms
an unchanging environment
Answer explanation
transitional = CHANGE. Look for the answer choice talkig about change occurring.
Tags
NGSS.MS-LS4-1
NGSS.MS-LS4-2
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