TEAS® Science Practice Test

Question 1

An unknown element is found to contain 45 protons and an atomic mass of 64, what is its atomic number?

Accepted Answer

45

Answer

The atomic number of an element is solely determined by the number of protons in its nucleus. In this case, the unknown element contains 45 protons, so its atomic number is 45. The atomic mass (64) is the sum of protons and neutrons, but it does not define the element's atomic number.

Question 2

The square above is based on the eye color of two parents, one of whom has brown eyes and carries the recessive gene for green eyes (a). What is the probability that a biological child of these parents will have brown eyes?

Accepted Answer

50%

Answer

Assuming 'B' represents the dominant brown eye gene and 'b' represents the recessive green eye gene, and the brown-eyed parent carrying the recessive gene is heterozygous (Bb). If the other parent is homozygous recessive (bb, green eyes), a Punnett square cross (Bb x bb) would yield 50% Bb (brown eyes) and 50% bb (green eyes). Thus, the probability of a child having brown eyes is 50%.

Question 3

The spleen functions are part of the _____ system. Which of the following completes the sentence above?

Accepted Answer

lymphatic

Answer

The spleen is a vital organ that functions as a key component of the lymphatic system. It plays crucial roles in filtering blood, removing old or damaged red blood cells, storing blood, and producing lymphocytes, which are essential for immune responses.

Question 4

Which of the following is an example of deductive reasoning?

Accepted Answer

All secretaries are good typists. Cynthia is a secretary. Therefore, Cynthia is a good typist.

Answer

Deductive reasoning involves starting with a general statement or hypothesis and then drawing a specific conclusion based on that premise. The example 'All secretaries are good typists. Cynthia is a secretary. Therefore, Cynthia is a good typist' perfectly illustrates this, moving from a general truth to a specific, logical inference.

Question 5

Which of the following is a possible cause of herniation of discs?

Accepted Answer

whiplash

Answer

Whiplash is a common injury to the neck caused by a sudden, forceful back-and-forth movement of the head, often from car accidents. This rapid movement can place significant stress on the intervertebral discs in the spine, potentially leading to their bulging or herniation.

TEAS Practice Test

TEAS Practice Test

TEAS® Science Practice Test