BU2 Practice Test

Which of these best shows the next level of the model?

Choose the correct answer.

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A pine tree has organs that carry out specific functions needed for survival. What function do the tree’s leaves carry out?

Choose the correct answer.

• take in dissolved minerals

• capture sunlight to make food

• anchor the tree underneath the soil

Electromagnetic receptors are sensory receptors that allow animals to detect electromagnetic waves, such as visible light. In animal eyes, there are several different types of electromagnetic sensors called rods and cones. The tables shown contain information about rods and cones.

• Mantis shrimp have very poor vision during the day.

• Dogs can sense movement that humans may not notice.

• Birds detect motion more acutely than other types of animals do.

The picture shows the three tissue systems that make up the leaf of a vascular plant. Which statement describes how the tissue systems work together to maintain homeostasis in the plant?

Choose the correct answer.

• Dermal tissue stores excess water and keeps it from moving to other parts of the plant.

• Vascular tissue moves water to the ground tissue, excess water is released by the dermal tissue into the air.

• Ground tissue makes food, stores it, and then passes the stored food to the stem, roots, and leaves of the plant.

Until recently, medicine and dentistry were thought to be unrelated. Scientists now understand that hundreds of bacteria species live in the human mouth and can enter the bloodstream and travel through the body. This table describes four bacteria found in the mouth that scientists have linked to conditions previously thought to be unrelated to oral health. Which statement best describes the qualities of scientists that have led to this understanding?

Choose the correct answer.

• Scientists are open to new ideas and consider opposing ideas.

• Scientists pursue strengths in a theory and disregard weaknesses.

• Scientists are unlikely to pursue ideas that are viewed with skepticism.

The picture shows the process of photosynthesis.

Which statement best shows the function performed in Step 1?

Choose the correct answer.

• taking in water

• releasing oxygen

• capturing energy

Which of these descriptions match the tissue type Nerve, and how it supports the body.

• carries away waste product

• passes signals using electrical impulses

• brings nutrients and oxygen to cells

Which of these descriptions match the tissue type Blood, and how it supports the body. *there can be more than one answer.

• carries away waste products

• passes signals using electrical impulses

• brings nutrients and oxygen to cells

High concentrations of carbon dioxide are harmful to the human body. The heart and the lungs work together to keep the body’s carbon dioxide level low. When the amount of carbon dioxide in the blood gets too high, the heart beats faster and the lungs begin to exhale more rapidly. This allows the lungs to remove the carbon dioxide from the blood and expel it from the body faster.

Based on the information, select the TWO body systems that work together to maintain a low carbon dioxide concentration in the body.

• circulatory system

• digestive system

• excretory system

• nervous system

• respiratory system

Which plant structure is the site of photosynthesis and gas exchange

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