LRHS STAAR Categories 3 & 4 Checkpoint
star
star
star
star
star
Last updated 8 months ago
12 questions
1
A new predator of rabbits has been introduced within an ecosystem. This new predator runsfaster than the native predators of rabbits.
Which statement describes what will most likely occur in the rabbit population due to theintroduction of the predator?
A new predator of rabbits has been introduced within an ecosystem. This new predator runs
faster than the native predators of rabbits.
Which statement describes what will most likely occur in the rabbit population due to the
introduction of the predator?
1
The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamanderabout 2–5 cm in length. E. nana is found only in Spring Lake and a portion of the San MarcosRiver.
Which human activity would most likely decrease the ability of the salamanders to survive?
The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander
about 2–5 cm in length. E. nana is found only in Spring Lake and a portion of the San Marcos
River.
Which human activity would most likely decrease the ability of the salamanders to survive?
1
A type of cellular transport is shown.
Which description best identifies this type of cellular transport?
A type of cellular transport is shown.
Which description best identifies this type of cellular transport?
1
Mice have two unlinked allele pairs that affect fur color. The table shows how allele pairs affect fur color. The term “agouti” describes fur with pigmentation that changes in each hairfrom the shaft to the tip, giving the fur a banded appearance. Mice with the aa allele pair are albino, regardless of the second allele-pair combination.
What is the probability of albinism in the offspring of a cross between two mice with AaBb alleles?
Mice have two unlinked allele pairs that affect fur color. The table shows how allele pairs affect fur color. The term “agouti” describes fur with pigmentation that changes in each hair
from the shaft to the tip, giving the fur a banded appearance. Mice with the aa allele pair are albino, regardless of the second allele-pair combination.
What is the probability of albinism in the offspring of a cross between two mice with AaBb alleles?
1
A partial Texas food web is shown.
The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?
A partial Texas food web is shown.
The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?
1
A biomass pyramid of an ecosystem is shown.
Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?
A biomass pyramid of an ecosystem is shown.
Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?
1
CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of anorganism. Using this technique scientists can add, remove, or modify sections of the DNAsequence.
How can scientists use this technique to control gene expression?
CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an
organism. Using this technique scientists can add, remove, or modify sections of the DNA
sequence.
How can scientists use this technique to control gene expression?
1
During secondary succession, which of these best describes why decomposing pioneer plantsgive way to larger, more complex plants species, such as hardwood trees?
During secondary succession, which of these best describes why decomposing pioneer plants
give way to larger, more complex plants species, such as hardwood trees?
1
The white cattail is a hybrid species of plant that is a result of the cross between the broad-leaved cattail and the narrow-leaved cattail. Over time, the white cattail has established itself in the wetlands of Midwestern states.
Which of these explains the success of the white cattail?
The white cattail is a hybrid species of plant that is a result of the cross between the broad-leaved cattail and the narrow-leaved cattail. Over time, the white cattail has established itself in the wetlands of Midwestern states.
Which of these explains the success of the white cattail?
1
Adaptations that result from natural selection are expected to increase the fitness of an organism. In terms of natural selection, which of the following best describes fitness?
Adaptations that result from natural selection are expected to increase the fitness of an organism. In terms of natural selection, which of the following best describes fitness?
1
The image shows part of the humerus bone in different genera of primates.
Which statement is best supported by the observable structures of the different humerus bones?
The image shows part of the humerus bone in different genera of primates.
Which statement is best supported by the observable structures of the different humerus bones?
1
Two scientists studied patterns of evolution in the fossil record. Many species they analyzed showed periods of slow changes interrupted by a period of rapid change.
This pattern of periods of slow change interrupted by periods of rapid change with few, if any transitional fossils, best describes the theory of —
Two scientists studied patterns of evolution in the fossil record. Many species they analyzed showed periods of slow changes interrupted by a period of rapid change.
This pattern of periods of slow change interrupted by periods of rapid change with few, if any transitional fossils, best describes the theory of —