ATI TEAS 7
Biology
1. What is the process of transporting molecules across the cell membrane against a concentration gradient called?
- A. Diffusion
- B. Osmosis
- C. Active transport
- D. Facilitated diffusion
Correct answer: C
Rationale: Rationale: A) Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, which does not require energy input. B) Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. C) Active transport is the process of transporting molecules across the cell membrane against a concentration gradient, requiring energy in the form of ATP to move substances from an area of lower concentration to an area of higher concentration. D) Facilitated diffusion is a type of passive transport that involves the use of transport proteins to move molecules across the cell membrane from an area of higher concentration to an area of lower concentration, without the need for energy input.
2. You design an experiment to test the effectiveness of a new fertilizer. Which of the following factors would be considered a dependent variable?
- A. The type of fertilizer used
- B. The size and age of the plants
- C. The amount of plant growth observed
- D. The cost of the fertilizer per unit
Correct answer: C
Rationale: The dependent variable is the factor that is being measured or observed in an experiment. In this case, the amount of plant growth observed is the variable that is being influenced by the independent variable, which is the type of fertilizer used. The size and age of the plants (option B) could potentially be controlled variables, while the type of fertilizer used (option A) is the independent variable being tested. The cost of the fertilizer per unit (option D) is not directly related to the plant growth being measured in this experiment.
3. Adaptive radiation refers to the evolutionary process where:
- A. A single ancestral species diversifies into multiple descendant species due to ecological pressures in a heterogeneous environment.
- B. Two unrelated species evolve similar adaptations in response to similar environments, leading to convergent evolution.
- C. A population becomes increasingly well-adapted to its current environment through continued natural selection.
- D. The fossil record exhibits gaps or missing links in the evolutionary history of a lineage.
Correct answer: A
Rationale: Rationale: - Adaptive radiation is a process where a single ancestral species diversifies into multiple descendant species to exploit different ecological niches within a heterogeneous environment. - This diversification occurs due to the different selective pressures present in various habitats, leading to the evolution of distinct traits and adaptations in different descendant species. - Option A accurately describes the process of adaptive radiation, where the initial species undergoes rapid speciation to occupy different ecological roles and adapt to diverse environmental conditions. - Options B, C, and D do not accurately describe adaptive radiation but refer to other evolutionary processes such as convergent evolution, natural selection, and gaps in the fossil record, respectively.
4. Balance the chemical equation: C4H10 + O2 → CO2 + H2O. What is the coefficient for oxygen?
- A. 5
- B. 6
- C. 7
- D. 8
Correct answer: b
Rationale: The balanced equation is C4H10 + 6O2 → 4CO2 + 5H2O.
5. Which sentence uses comma splices incorrectly?
- A. The baker kneaded the dough, flour dusted her apron, and the oven warmed up.
- B. The mountains, shrouded in mist, seemed to disappear into the clouds.
- C. He arrived late, having forgotten his keys, and the meeting had already started.
- D. The movie, despite its flaws, was surprisingly enjoyable.
Correct answer: C
Rationale: Option (c) incorrectly combines two independent clauses with only a comma. A semicolon or conjunction is needed
6. What is the tone of the following sentence: "The presentation was informative and engaging."
- A. Sarcastic
- B. Neutral
- C. Angry
- D. Confused
Correct answer: B
Rationale: The sentence objectively describes the presentation without expressing any specific emotions.
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