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18 questions
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  • Q1
    The male flying dragon lizard in the photo is opening a brightly-colored flap of skin at its throat. This is a display of courtship behavior that only happens during certain times of the year. ***What is the effect of this courtship behavior?***
    Question Image
    There is an increased probability that the lizard will survive.
    There is an increased probability that the lizard will defend its territory.
    There is an increased probability that the lizard will reproduce.
    300s
  • Q2
    Janna plans to give her teacher a plant she's grown from seed as an end of the year gift. After the seed sprouts, she places the pot next to a window. ***Which statement explains why the plant in the photo seems to be growing toward the light? ***
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    This is a behavioral trait that will likely help the plant to make enough food.
    This is a behavioral trait that will likely help the plant to get more oxygen.
    This is a physical trait that will likely help the plant to get more water.
    300s
  • Q3
    The photo shows plant seed pods that became stuck in a horse's mane as the horse grazed in a field. The hooked structure of these seed pods mean they can get caught on passing animals. As the horse trekked across several acres of land throughout the day, seed pods fell from its mane. Many of these seed pods landed in different fields. ***How does the structure of the seed pods affect the likelihood the plant will reproduce?***
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    The plant is more likely to reproduce because its seeds will attract more animals.
    The plant is more likely to reproduce because its offspring will not compete with the parent plant.
    The plant is less likely to reproduce because the seeds will land in different soil in a new field.
    300s
  • Q4
    A gardener does a simple experiment. She plants seeds from the same kind of flower in two garden boxes. She gives one group of seeds fertilizer and water. She gives the other group only water. The garden boxes get the same amount of light and are at the same temperature. ***The picture shows how the plants look after several weeks. Based on the evidence in the picture, which statement identifies the most likely explanation for the results of her experiment?***
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    The fertilizer affected the plants' physical traits.
    The temperature affected the traits the plants need to reproduce.
    The amount of light affected the traits the plants need to survive.
    300s
  • Q5
    Diego learns that male fireflies attract mates of their own species by flashing light from their abdomen in a specific pattern. He would like to investigate how female fireflies react to this male behavior. ***What type of device could Diego design and improve upon to use in his investigation?***
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    one that detects the foods female fireflies eat
    one that imitates a male firefly's flashing pattern
    one that counts the number of eggs each female firefly will lay
    300s
  • Q6
    An organism must have physical traits in order to help it get and conserve water. What is one way in which a plant's physical traits help it prevent dehydration?
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    A sweet potato stores water in its root after it rains to use during a dry period.
    A bamboo plant grows several centimeters per day during the rainy season.
    A deer will not eat marigold leaves because they make a bad tasting chemical.
    300s
  • Q7
    Members of the species of cicada, shown in the photo, live underground for most of their lives. However, every seventeen years, they come out of the ground to mate. After mating, each female lays about six hundred eggs in tree branches. Larvae hatch from these eggs, drop to the ground, and burrow into the soil. ***How do these cicadas increase the chances of the survival of their offspring?***
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    They produce more offspring than are likely to survive.
    They remain underground for most of their lives.
    They mature into adults before they can reproduce.
    300s
  • Q8
    Aphids, shown in the photo, are pests for papaya plants. As the aphids drink a papaya plant juices, they infect the plant with a virus. Once infected by the virus, plants cannot grow healthy leaves. Papaya growers often spray oils on their plants to control aphids. ***Which describes a papaya plant that is more likely to die?***
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    one that does not have healthy leaves and is covered in aphids
    one that does not have the virus and is full of juices
    one that does not have aphids and is covered in oils
    300s
  • Q9
    Alfalfa plants produce a chemical that tastes bitter to certain types of insects. Which statement explains the effect of producing this chemical?
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    Plants that make the chemical are more likely to be able to resist disease.
    Plants that make the chemical are more likely to grow and reproduce.
    Plants that make the chemical are less likely to be eaten by deer.
    300s
  • Q10
    Yasmin enters an engineering competition to design a model of a seed meant to be dispersed by wind. The models will be judged based on two criteria: the model needs to stay in the air for at least 30 seconds and land on a target when dropped from 10 meters above the ground. Yasmin thinks about different designs for a couple of days. Then she builds the design she thinks will work best. The result of her first test is in the table. ***What should Yasmin do to win the competition?***
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    turn in her model to the judges because it meets criterion 1 very well
    change her model to meet criterion 2 and then repeat test 2 until she meets the criterion
    keep revising and testing her model for both criteria until it meets both criteria
    300s
  • Q11
    Male humpback whales make certain sounds to attract a mate. This behavior seems to be passed on from one generation to the next. ***Which of the following statements best describes an effect of these male whale songs?***
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    Male humpback whales are more likely to survive than female humpback whales.
    Male humpback whales are certain to attract a mate and reproduce successfully.
    Male humpback whales are more likely to attract a mate and reproduce successfully.
    300s
  • Q12
    An engineer is asked to solve a problem with a passenger train in Japan. The train is able to carry a large number of passengers at high speeds. However, the train makes a lot of noise as it passes through neighborhoods where many people live and work. The noise it makes can be measured in decibels, reaching 90 decibels at its loudest. ***Which criterion is most likely to ensure the engineer comes up with a successful solution to the problem?***
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    The train needs to use less energy.
    The train needs to travel slower.
    The noise from the train needs to be less than 70 decibels.
    300s
  • Q13
    Plants often need animals to disperse their seeds. Why then, do some of these plants produce very spicy pods that cover their seeds? Humans may enjoy the taste of spicy foods, but most other animals do not. Two scientists wanted to find out if the spicy substances produced by some pepper plants affect the plants’ ability to reproduce. They already knew that, after eating, mice leave behind broken seeds that cannot germinate, while birds leave behind whole seeds that can germinate. For the experiment, they offered each type of animal the same number of three foods: berries, non-spicy peppers, and spicy peppers. They recorded how much of each food was eaten. ***Based on the data table, for which food did the two animals differ the most in the amount they ate?***
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    spicy peppers
    berries
    non-spicy peppers
    300s
  • Q14
    Plants often need animals to disperse their seeds. Why then, do some of these plants produce very spicy pods that cover their seeds? Humans may enjoy the taste of spicy foods, but most other animals do not. Two scientists wanted to find out if the spicy substances produced by some pepper plants affect the plants’ ability to reproduce. They already knew that, after eating, mice leave behind broken seeds that cannot germinate, while birds leave behind whole seeds that can germinate. For the experiment, they offered each type of animal the same number of three foods: berries, non-spicy peppers, and spicy peppers. They recorded how much of each food was eaten. ***Which conclusion can be drawn from what you know about seed dispersal and from the evidence in the table?***
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    Packrats help pepper plants reproduce.
    Thrasher birds help pepper plants reproduce.
    Packrats help berry plants reproduce.
    300s
  • Q15
    Plants often need animals to disperse their seeds. Why then, do some of these plants produce very spicy pods that cover their seeds? Humans may enjoy the taste of spicy foods, but most other animals do not. Two scientists wanted to find out if the spicy substances produced by some pepper plants affect the plants’ ability to reproduce. They already knew that, after eating, mice leave behind broken seeds that cannot germinate, while birds leave behind whole seeds that can germinate. For the experiment, they offered each type of animal the same number of three foods: berries, non-spicy peppers, and spicy peppers. They recorded how much of each food was eaten. ***Which evidence supports the argument that producing a spicy substance can help pepper plants reproduce?***
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    Both animals ate some of the non-spicy peppers
    Packrats did not eat any of the spicy peppers
    Thrasher birds ate more of the non-spicy peppers.
    300s

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