CBA #2 (read to you)
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18 QuestionsShow answers
  • Question 1
    30 seconds

    1.How do gills of fish help their survival?

    answer choices

    A. Gills allow fish to break down water into oxygen and hydrogen

    B. Gills allow fish to process energy quicker so they can move faster.

    C. Gills allow fish to breathe in air and water.

    D. Gills allow fish to use the oxygen dissolved in the water.

  • Question 2
    30 seconds

    2.Which organism would be least likely to survive a migration?

    answer choices

    F. deer with an extra horn

    G. A bird flying with a flock

    H. A monarch butterfly with a damaged wing

    J. A bison that joins a herd

  • Question 3
    30 seconds

    3.Lake Victoria in East Africa is home to many species of fish called cichlids. In 1954 the predatory Nile perch was introduced to Lake Victoria. The Nile perch became the dominant fish species in the lake by the mid-1980s. The number of cichlid species in the lake decreased as the Nile perch population increased. The perch preyed heavily on cichlid species that fed on algae and debris on the bottom of the lake. Algae in the lake increased, and oxygen levels decreased. The surface area of the gills of some cichlid species has increased in over 20 years.

    answer choices

    A. Increased gill surface area has allowed the cichlids to change their diet and avoid competing with the Nile perch.

    B. Increased gill surface area has allowed the cichlids to be camouflaged and avoid being eaten by the Nile perch.

    C. Increased gill surface area has allowed the cichlids to leave Lake Victoria and establish populations in nearby bodies of water.

    D. Increased gill surface area has allowed the cichlids to better absorb the limited oxygen in the water.

  • Question 4
    30 seconds

    4.Wheat was one of the first plant crops that humans domesticated. In the process of domestication, the wild form of wheat was eventually changed into a form more suited to human agricultural practice.

    Early farmers most likely used seeds only from wheat plants with --

    answer choices

    F. larger grains that could produce more food per plant.

    G. taller stems that could block sunlight from weeds growing at ground level.

    H larger flowers that could be sold for additional income

    thinner stems that could endure heavy winds

  • Question 5
    30 seconds

    5.Students observe two varieties of flowering plants that grow in the Texas grasslands. Galanthus flowers are better able to survive in the grasslands when there are periods of drought compared to Bluebell flowers.

    Based on the picture above, what structures allow Galanthus flowers to better survive drought conditions compared to the Bluebell flower

    answer choices

    A. Galanthus flowers have longer stems that allow them to capture more sunlight.

    B. Galanthus flowers have fewer leaves causing food production to be efficient.

    C. Galanthus flowers have long roots to reach ground water.

    D. Galanthus flowers have bulb roots that store large amounts of food.

  • Question 6
    30 seconds

    6.Some dairy farmers want to increase the amount of milk production by their cows. How can the farmers use selective breeding to increase milk production?

    answer choices

    F. By increasing the age of the cows that are bred.

    G. By choosing cows that are high milk producers

    H. By limiting the number of offspring per cow.

    J. by choosing cows that can produce milk after eating the most food

  • Question 7
    30 seconds

    7.Part of a human body system is pictured.

    The main function of this system is to --

    answer choices

    A. control reproduction

    B. transport oxygen

    C. produce hormones

    D. remove waste.

  • Question 8
    30 seconds

    8.What purpose does the xylem in a plant serve?

    answer choices

    F. Transportation of food and nutrients.

    G. Transportation of water and minerals.

    H. Anchors the plant in the ground.

    J. Transforms energy through photosynthesis.

  • Question 9
    30 seconds

    9.The main function of the muscular system is --

    answer choices

    A. support of the body

    B. break down of food

    C. movement of the body

    D. removal of waste

  • Question 10
    30 seconds

    10.What two body systems are most useful in getting nutrients from the food you eat to your brain?

    answer choices

    F. Muscular and endocrine systems

    G. Digestive and nervous systems

    H. Nervous and circulatory systems

    J. Circulatory and digestive systems

  • Question 11
    30 seconds

    11.This drawing shows a human body system.

    What is the primary function of this body system?

    answer choices

    A. The protection of vital organs from injury.

    B. The chemical breakdown of food into smaller pieces.

    C. The transport of nutrients, water, and oxygen to body cells.

    D. The production of hormones that regulate growth and metabolism.

  • Question 12
    30 seconds

    12.Many birds, such as the barn swallow, have hollow bones, while a few birds, such as the ostrich, have solid bones. Which best explains this adaptation that are seen in birds

    answer choices

    F. Hollow bones allow for a lighter body weight for flight.

    G. Larger birds need solid bones to hold the weight when standing.

    H. Solid bones are an advantage because hollow bones are too brittle.

    J. Hollow bones allow for more space for making more red blood cells.

  • Question 13
    30 seconds

    13.Chameleons are reptiles that have the ability to hide from predators and prey by blending in with their environment. They can change the pattern and/or color of their skin.

    This ability is known as --

    answer choices

    A. natural selection

    B. imitations

    C. mimicry

    D. camouflage

  • Question 14
    30 seconds

    14.A few years ago the population of male blue moon butterflies on the island of Samoa declined. One hypothesis for the decline of the male butterflies is that a parasite infected the cells of female butterflies. The parasite was passed to offspring through the females' eggs and killed the male butterfly embryos. At one point during the decline, nearly all the butterflies in the population were females, but after five years the number of males in the population increased significantly.

    Which explanation most likely accounts for the increase in the number of male butterflies in the five years after the initial parasite problem

    answer choices

    F. Male butterflies in the population that survived were able to prey on the parasites living in the females' egg cells.

    G. Female butterflies in the population that survived had a genetic adaptation that allowed them to transform into male butterflies.

    H. Male butterflies in the population that survived had a gene that made them resistant to the parasite, and they passed the gene on to their offspring.

    J. Female butterflies in the population that survived were able to protect the male eggs from the parasite and provide extra care for the male offspring

  • Question 15
    30 seconds

    15.Which table best shows some functions of the circulatory, respiratory, digestive, an endocrine systems?

    answer choices





  • Question 16
    30 seconds

    What body systems are described in the concept map above?

    answer choices

    F. Circulatory and excretory

    G. Endocrine and circulatory

    H. Excretory and endocrine

    J. Respiratory and excretory

  • Question 17
    30 seconds

    17.What characteristics describe organisms classified in to the Kingdom Fungi?

    answer choices

    A. Prokaryotic and autotrophic

    B. Prokaryotic and heterotrophic

    C. Eukaryotic and autotrophic

    D. Eukaryotic and heterotrophic

  • Question 18
    30 seconds

    18.The characteristics of a particular organism are listed below.

    In which kingdom should this organism be classified?

    answer choices

    F. Fungi

    G. Eubacteria

    H. Plantae

    J. Animalia

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