TEAS Practice Test Science

Correct Answer: C

Rationale: The independent variable is the one that is intentionally manipulated by the researcher. In this case, the botanist is studying root growth, so the variable that the botanist can control and manipulate is the light exposure. By changing the amount of light the roots receive, the botanist can observe how it affects root growth. Temperature (choice A) and root tissue (choice B) are not variables being manipulated in this experiment, so they are not the independent variable. Root length (choice D) is the dependent variable, as it is the outcome being measured based on the changes in the independent variable, light exposure.

Correct Answer: C

Rationale: The correct answer is C: Skull. The axial skeleton consists of bones along the central axis of the body, including the skull. The skull protects the brain and is a key part of the axial skeleton. The other choices - A (Femur), B (Humerus), and D (Pelvis) are all part of the appendicular skeleton, which includes the bones of the limbs and girdles. The femur is the thigh bone, the humerus is the upper arm bone, and the pelvis is part of the hip bone, all of which are not considered part of the axial skeleton.

Correct Answer: D

Rationale: The correct answer is D: Temporal lobe. The temporal lobe is responsible for processing auditory sounds as it contains the primary auditory cortex. This area interprets and processes sound information received from the ears. The frontal lobe (A) is involved in higher cognitive functions, the occipital lobe (B) is responsible for processing visual information, and the parietal lobe (C) is involved in sensory processing and spatial awareness. Therefore, the temporal lobe is the correct choice for processing auditory sounds.

Correct Answer: C

Rationale: The correct answer is C: Inner mitochondrial membrane. The electron transport chain occurs in the inner mitochondrial membrane because it is where the proteins and complexes involved in oxidative phosphorylation are located. This is where electrons are passed along the chain, leading to the production of ATP. The cytosol (choice A) is where glycolysis occurs, not the electron transport chain. The Golgi apparatus (choice B) is involved in protein processing and sorting, not energy production. The nucleus (choice D) houses the cell's genetic material and is not directly involved in the electron transport chain.

Correct Answer: C

Rationale: The correct answer is C: Pluripotent stem cells. Pluripotent stem cells can differentiate into many different cell types but cannot form a complete organism. They have the ability to give rise to cells of all three germ layers. Totipotent stem cells (A) can form a complete organism, including both embryonic and extra-embryonic tissues. Multipotent stem cells (B) can develop into a limited range of cell types. Hematopoietic stem cells (D) specifically give rise to blood cells and their progenitors, so they are more specialized compared to pluripotent stem cells.