BIO 155 Unit 7 Exam

One mechanism by which viral infections may increase the risk of cancer is __________.

altering the function of regulatory genes

Color blindness usually results from a decrease in the number of

cones

The optic disc is the area of the eye __________.

where the optic nerve exits the eye

Muscle spindles are __________.

proprioceptors

When two species contain identical or nearly identical molecules such as proteins, this suggests

the two species share a common ancestry

Taste hairs contain chemoreceptors that are specific for specific chemicals or tastants.

False

Which of the following statements about the hominoids is FALSE?

Hominoids lack tails.

Humans belong to all of the following taxonomic groups, EXCEPT __________.

Prokaryotae

Which of the following statements regarding skin cancer is true?

Skin cancer can develop from cumulative sun exposure, even in the absence of sunburns.

Which of the following does NOT occur as a cell progresses toward becoming cancerous?

The cell retains its normal function.

Pain receptors adapt slowly or not at all because __________.

Lack of adaptation is important to survival.

Which of the following represents the correct order of steps leading to the development of malignant cancer?

hyperplasia, dysplasia, in situ cancer, metastasis and/or invasion

Different-pitched sounds will result in stimulation of receptors located in different regions of __________.

the cochlea

When we adjust our head and eye position to carefully look at something, we are directing the image to focus on __________.

the macula

Which of the following statements about breast cancer is true?

Early onset of menstruation and/or late onset of menopause is a risk factor for the development of breast cancer.

Random changes in the frequency of alleles of a population because of chance events is known as natural selection.

False

Which of the following statements about fossils is true?

Fossils are most likely to be found in sedimentary rock.

RNA is believed to have evolved before DNA and proteins.

True

With the advent of photosynthesis and the subsequent production of oxygen by photosynthetic organisms, most of the anaerobic organisms present on Earth became extinct because oxygen was actually toxic to these organisms.

True

Ménière's syndrome is a condition in which __________.

an individual suffers from dizziness and hearing loss

Which of the following cancer treatments prevents growth of blood vessels that support growing tumors?

anti-angiogenic drugs

Which of the following imaging techniques expose(s) the body to radiation?

both X-rays and PET scans

Which one of the following conditions results when the transparency of the lens decreases?

cataracts

Which of the following cancer treatments would be most effective at targeting both the original tumor as well as all secondary tumors?

chemotherapy

The ABCD rule refers to the evaluation of __________.

melanoma

In the early Earth, the development of ________ created oxygen gas in the atmosphere.

photosynthesis

The photoreceptors of the eye are __________.

rods and cones

Which one of the following structures is used to sense rotational movement of the head and body?

semicircular canals

Genetic drift is most likely to affect __________.

small populations

The most common cause(s) of cancer deaths in the United States is/are __________.

smoking