Science TEAS Practice Test

Correct Answer: B

Rationale: To be included in the formation of a scientific conclusion, evidence must be reproducible. This means that the findings can be repeated by other researchers to ensure the validity and reliability of the results. Reproducibility is essential in scientific research to confirm the accuracy of the findings and allow for independent verification. Quantitative evidence, while important in providing numerical data, is not always necessary for forming a scientific conclusion. Qualitative evidence, which describes qualities or characteristics, can also contribute to scientific conclusions. The choice "C: Obvious" is incorrect because scientific evidence may not always be obvious and often requires careful analysis and interpretation. Choice "D: All of the above" is incorrect because not all scientific evidence needs to be quantitative, and while reproducibility is crucial, it is not necessary for evidence to be obvious to be included in forming a scientific conclusion.

Correct Answer: D

Rationale: The correct answer is D: Plasma cells. Plasma cells are a type of white blood cell that produces and secretes antibodies, which are essential for the immune response. Plasma cells are specifically designed to produce antibodies to fight off infections. Bacterial cells (choice A) and viral cells (choice B) do not secrete antibodies as they are pathogens. Lymph cells (choice C) are a general term for various types of white blood cells, including plasma cells, but not all lymph cells secrete antibodies. Plasma cells, on the other hand, are specialized for antibody production, making choice D the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Secondary structure. Secondary structure refers to the local folding patterns of the polypeptide backbone, mainly involving alpha helices and beta sheets. This level of protein structure is determined by hydrogen bonding between amino acids along the backbone. Primary structure (A) is the linear sequence of amino acids, tertiary structure (C) refers to the overall 3D shape of a protein, and quaternary structure (D) involves the arrangement of multiple protein subunits. In this case, the question specifically asks about the folds and coils of the polypeptide backbone, which align with the characteristics of secondary structure.

Correct Answer: C

Rationale: The correct answer is C: Small intestine. This is because the small intestine is where the majority of nutrient absorption occurs in the digestive system. The small intestine is lined with villi and microvilli, which greatly increase its surface area for absorption. Digestive enzymes and bile are also released in the small intestine to further break down nutrients for absorption. The stomach mainly breaks down food, the large intestine primarily absorbs water and electrolytes, and the mouth initiates digestion through chewing and mixing food with saliva.

Correct Answer: D

Rationale: The correct answer is D because all the statements provide reasonable explanations for the decrease in mortality during childbirth in the 21st century. A: Cesarean sections can be life-saving in cases of complications like prolonged labor or fetal distress. B: Monitoring tools help detect issues early, allowing for timely interventions and prevention of complications. C: Good hand hygiene reduces the risk of infections that could lead to maternal mortality. Therefore, by combining the advancements in cesarean sections, monitoring tools, and infection prevention practices, modern healthcare has significantly reduced maternal mortality rates compared to the 18th century.