AZSCI Structure and Function

Question 1

The alveoli in the human lungs are tiny, thin-walled air sacs. This structure is directly related to which function?

Accepted Answer

Efficiently exchanging gases with the blood

Answer

Filtering dust and particles from the air

Answer

Producing mucus to trap pathogens

Answer

Strengthening the lung tissue against pressure changes

Question 2

A cactus has a thick, waxy coating called a cuticle, and its leaves are modified into spines. How do these structures help the cactus survive in a desert environment?

Accepted Answer

They reduce water loss and provide protection.

Answer

They help the cactus absorb more sunlight for photosynthesis.

Answer

They increase the plant's ability to absorb nutrients from the soil.

Answer

They allow the cactus to grow taller than other desert plants.

Question 3

The shape of a water molecule (H₂O) is bent, with the oxygen atom having a slight negative charge and the hydrogen atoms having slight positive charges. This polar structure is primarily responsible for which important function of water?

Accepted Answer

Its ability to dissolve many different substances

Answer

Its ability to exist as a solid, liquid, and gas on Earth

Answer

Its neutral pH of 7

Answer

Its high boiling point compared to other similar-sized molecules

Question 4

Engineers often use a honeycomb structure in materials for airplanes and spacecraft. What is the primary functional advantage of this structure?

Accepted Answer

It provides a high strength-to-weight ratio.

Answer

It is the easiest structure to manufacture.

Answer

It is completely waterproof.

Answer

It is an excellent electrical insulator.

Question 5

The hollow bones of a bird are an adaptation for flight. How does this structure support this function?

Accepted Answer

They reduce the overall mass of the bird.

Answer

They make the bird more flexible for maneuvering.

Answer

They store extra oxygen for long flights.

Answer

They provide better protection for internal organs upon landing.

Question 6

How does the structure of a neuron, with its long axon and branching dendrites, relate to its function in the nervous system?

Accepted Answer

It allows for transmitting and receiving signals over distances.

Answer

It allows for the storage of large amounts of energy.

Answer

It provides structural support to surrounding tissues.

Answer

It enables the production of hormones for the endocrine system.

Question 7

The layered appearance of sedimentary rock is a direct result of its formation process. This structure provides evidence for what function or process?

Accepted Answer

The deposition of materials in layers over time.

Answer

The cooling and crystallization of molten magma.

Answer

The intense heat and pressure changing a rock's form.

Answer

The rapid erosion of a single type of rock by wind.