CBA #2 (read to you)

1.How do gills of fish help their survival?

• 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.

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

• 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

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.

• 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.

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 --

• 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

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

• 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.

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?

• 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

7.Part of a human body system is pictured.

The main function of this system is to --

• A. control reproduction

• B. transport oxygen

• C. produce hormones

• D. remove waste.

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

• F. Transportation of food and nutrients.

• G. Transportation of water and minerals.

• H. Anchors the plant in the ground.

• J. Transforms energy through photosynthesis.

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

• A. support of the body

• B. break down of food

• C. movement of the body

• D. removal of waste

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

• F. Muscular and endocrine systems

• G. Digestive and nervous systems

• H. Nervous and circulatory systems

• J. Circulatory and digestive systems