Class Quiz_GRD 12

A part of the brain that regulates body temperature is the …

• cerebellum.

• cerebrum.

• hypothalamus.

• corpus callosum.

When a person spends most of his/her time looking at a cell phone or computer screen the ciliary muscles of the eye are in a constant state of contraction. The muscles cannot return to their relaxed position.

As a result, the muscles are unable to change the …

• shape of the lens to focus on distant objects.

• shape of the lens to focus on nearby objects.

• size of the pupil to let more light into the eye.

• size of the pupil to reduce the amount of light entering the eye.

A DNA molecule codes for a protein containing 150 amino acids.

How many nucleotides are likely to be present in this DNA molecule?

• 15

• 450

• 150

• 900

Which one of the following occurs during meiosis?

• A haploid cell gives rise to two haploid cells

• A diploid cell gives rise to two haploid cells

• A haploid cell gives rise to four haploid cells haploid cells

• A diploid cell gives rise to four

The watery fluid that supports the cornea and the front chamber of the eye

A part of the nervous system that consists of a sympathetic and a parasympathetic section

The layer of the eyeball that contains photoreceptors

Changes that take place in the shape of the lens in response to the distance of an object from the eye

Describe how the ear plays a role in maintaining balance when the body changes speed and direction.

Describe the accommodation of the eye for distant vision.