ati teas 7 science

Correct Answer: A

Rationale: The correct answer is A: Musca domestica. The scientific name for the common housefly is Musca domestica. "Musca" refers to the genus name, while "domestica" refers to the species name. This specific binomial nomenclature system is used in taxonomy to classify and identify organisms. The other choices are incorrect because: B: Drosophila melanogaster refers to the fruit fly, C: Apis mellifera is the honeybee, and D: Anopheles gambiae is a mosquito species. Each of these options represents different species within the insect family, but only A corresponds to the common housefly.

Correct Answer: D

Rationale: The correct answer is D: Researching previous studies for background. Before generating a hypothesis, it is crucial to review existing research to build a foundation of knowledge. This step helps identify gaps in current understanding, refine research questions, and ensure the hypothesis is based on existing evidence. Collecting and organizing data (A) occurs after the hypothesis is formulated. Communicating results (B) is the final step after conducting experiments (C). Therefore, the correct order is researching previous studies (D), generating a hypothesis, conducting an experiment, collecting and organizing data, and finally communicating the results.

Correct Answer: D

Rationale: The correct answer is D: Tensile strength. Dense irregular connective tissue, found in tendons and ligaments, is composed of collagen fibers arranged in a random pattern, providing resistance to tension in multiple directions. This structural arrangement allows tendons and ligaments to withstand pulling forces and maintain their shape, ultimately providing tensile strength. Explanation: A: Flexibility - While tendons and ligaments do require some degree of flexibility, their primary function is to provide strength and stability rather than flexibility. B: Lubrication - Lubrication is not a primary function of dense irregular connective tissue in tendons and ligaments. C: Insulation - Dense irregular connective tissue does not primarily serve as an insulating material in tendons and ligaments; its main function is to provide mechanical support and strength. In summary, the correct answer is D because dense irregular connective tissue in tendons and ligaments is specifically designed to provide tensile strength by resisting pulling forces and

Correct Answer: C

Rationale: The correct answer is C: Buffering system. The body maintains a relatively constant blood pH level through the buffering system, which involves the action of bicarbonate ions, carbonic acid, and other buffering molecules that help regulate pH by neutralizing excess acids or bases. This system acts quickly to prevent drastic changes in blood pH when there are fluctuations in blood carbon dioxide concentration. Cellular respiration (A) generates carbon dioxide, gas exchange (B) involves the exchange of gases in the lungs, and deoxygenation (D) refers to the loss of oxygen by the blood, but these processes are not primarily responsible for maintaining blood pH stability.

Correct Answer: B

Rationale: The correct answer is B: 23. In humans, each normal cell contains 23 pairs of chromosomes, making a total of 46 chromosomes. The pairs consist of one chromosome from each parent, ensuring genetic diversity. Choices A, C, and D are incorrect because they do not reflect the accurate number of chromosome pairs in a human cell. Option A (46) is the total number of chromosomes, not pairs. Option C (64) and D (32) are not the correct numbers of chromosome pairs in a human cell.