Unit 1
Which option describes a function that all cells carry out to support life?
1.carrying food molecules to other cells
2.repairing other, damaged cells
3.making copies of themselves
3.making copies of themselves
What best describes the chromosomes of eukaryotic organisms
1. Eukaryotic organisms have multiple sets of chromosomes. Two sets of chromosomes are common.
2.Eukaryotic organisms have a single set of chromosomes. Some eukaryotes may have two sets.
3.Eukaryotic organisms have a single set of chromosomes. Some eukaryotes may have four sets.
4.Eukaryotic organisms have multiple sets of chromosomes. Four sets of chromosomes are common.
4. Eukaryotic organisms have multiple sets of chromosomes. Two sets of chromosomes are common.
Which choice is an example of artificial selection?
1.harvesting wheat plants with large seeds
2.peacocks having more and more elaborate tails
3.a rabbit having better and better hearing to detect predators
4.brown foxes that live in arctic regions having lighter and lighter colored fur
1.harvesting wheat plants with large seeds
Which option defines behavioral adaptations?
1.behaviors performed by an organism that increase its size
2.behaviors performed by an organism that increase its fitness
3.behaviors performed by an organism that increase its attractiveness
4.behaviors performed by an organism that increase its health
2.behaviors performed by an organism that increase its fitness
Which options correctly provide positive reasons to use a graph to present complex data?
(Select all that apply.)
1.Graphs can express more information within a smaller area than text can.
1.Graphs can express more information within a smaller area than text can.
2.Graphs make it easier to identify trends in data.
3.Graphs make forming a hypothesis easier.
4.Graphs can provide conclusions for scientific experiments.
1.Graphs can express more information within a smaller area than text can.
2.Graphs make it easier to identify trends in data.
Which describes chromosomes?
1.Chromosomes are membranes that cover DNA molecules.
2.Chromosomes are condensed masses of chromatin.
3.Chromosomes are the organelles in the cells that contain DNA.
4.Chromosomes are sections of longer DNA molecules that carry information.
2.Chromosomes are condensed masses of chromatin.
Read the scenario.
In some situations, when two tall pea plants reproduce, the offspring can be a tall or a short pea plant. When this experiment is run repeatedly, it is discovered that 3/4 of the offspring are tall and 1/4 of the offspring are short.
What would happen if this experiment were run only once?
1.Running the experiment once would give a single tall plant. The conclusion of the experiment would be that tall plants always produce tall plants.
2.Running the experiment once would result in a tall or a short plant. The conclusion of the experiment would depend on this single result and would not be accurate.
3.Running the experiment once would give a single short plant. The conclusion of the experiment would be that tall plants always produce short plants.
4.The experiment would give the same results. The conclusion would not be changed from the original experiment.
2.Running the experiment once would result in a tall or a short plant. The conclusion of the experiment would depend on this single result and would not be accurate.
Read the scenario.
A farmer has three cows which each produce a different average gallons of milk per day.
Cow 1 produces 4.
Cow 2 produces 5.
Cow 3 produces 7.
The farmer wants to be able to sell more milk, but he can only afford to feed so many cows.
Which cows should the farmer breed so that, in the long term, the farm produces the most milk possible?
1.Breed only Cow 3, because it produces the most milk.
2.Breed only Cow 1 so the more productive cows have more time to produce milk.
3.Let all of the cows breed and let the offspring compete for resources.
1.Breed only Cow 3, because it produces the most milk.
What is one way that plants maintain homeostasis?
1.releasing oxygen into the atmosphere
2.evolving thorns to discourage predators
3.circulating carbon in the carbon cycle
4.leaves closing their pores to reduce water loss
4.leaves closing their pores to reduce water loss
Read the scenario.
Kamal is doing an experiment on beans. He tests the beans in dry and wet soil. He discovers that beans sprout in the wet soil.
Based on the evidence, he writes the following claim: Beans require water and darkness to sprout.
Which option most effectively describes a mistake Kamal made in connecting the claim to the evidence?
1.Kamal did not wait long enough to see if beans may have sprouted in the dry soil.
2.Kamal did not test to see if beans can sprout in light. The beans may not specifically need darkness to sprout.
3.Kamal included only one type of plant in his study and should have included other plants.
4.Kamal tested the beans in dry and wet soil and in darkness and sunlight. All conditions allowed the beans to sprout.
2.Kamal did not test to see if beans can sprout in light. The beans may not specifically need darkness to sprout.
Which option describes a cell working as part of a larger organism?
1.a white blood cell fighting infections
2.a bacteria cell eating other bacteria cells
3.a bacteria cell that is infecting a person
4.Amoeba swimming in water
1.a white blood cell fighting infections
Which statement is one of Mendel’s contributions to science?
1.Mendel concluded that traits were controlled by DNA.
2.Mendel concluded that plant genes were found on chromosomes.
3.Mendel concluded that only planting seeds from the best crops would improve crops over time.
4.Mendel concluded that plant genes were determined by two parts.
4.Mendel concluded that plant genes were determined by two parts.
Read the passage.
Penguins have a layer of wax on their feathers that prevents water from penetrating into their bodies. Penguins hunt and eat fish.
Two penguins have a pair of offspring.
Which offspring has the more desirable trait?
1.Offspring 1. The thin layer of wax allows the penguin to spend more time on land.
2.Offspring 1. The thin layer of wax allows the penguin to hunt for longer periods.
3.Offspring 2. The thick layer of wax allows the penguin to hunt for longer periods.
4.Offspring 2. The thick layer of wax allows the penguin to spend more time on land.
3.Offspring 2. The thick layer of wax allows the penguin to hunt for longer periods.
Which option correctly defines innate behavior and provides an example of one?
1.An innate behavior is an activity or behavior that is taught to an organism. Reading a clock is an innate behavior.
2.An innate behavior is an activity or behavior that occurs naturally in an organism. Baby sea turtles automatically moving to the ocean after hatching is an innate behavior.
3.An innate behavior is an activity or behavior that must be learned. Singing is an innate behavior.
4.An innate behavior is an activity or behavior that does not occur naturally in an organism. Human babies crying when they are hungry is an innate behavior.
2.An innate behavior is an activity or behavior that occurs naturally in an organism. Baby sea turtles automatically moving to the ocean after hatching is an innate behavior.