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ATI TEAS 7

Biology

1. What is the term for a group of organisms living in the same place and interacting with each other?

Correct answer: B

Rationale: Rationale: - A) Ecosystem refers to a biological community of interacting organisms and their physical environment. - B) Community specifically refers to a group of organisms of different species living in the same place and interacting with each other. - C) Population refers to a group of individuals of the same species living in the same area. - D) Niche refers to the role or function of an organism or species within an ecosystem. In this context, the term for a group of organisms living in the same place and interacting with each other is best described as a community because it involves multiple species interacting within a shared habitat.

2. Vaccines work by stimulating the immune system to develop memory without causing full-blown illness. What type of molecule in a vaccine typically triggers the immune response?

Correct answer: D

Rationale: The correct answer is D: Antigens (specific molecules) from the pathogen. Vaccines contain antigens, which are specific molecules from the pathogen that trigger the immune response without causing the full-blown illness. By presenting these antigens to the immune system, vaccines stimulate the production of memory cells that can recognize and combat the pathogen in the future. Options A, B, and C are incorrect because vaccines typically do not contain toxins, live attenuated forms, or inactivated forms of the pathogen. Instead, they contain specific antigens to induce an immune response without causing the actual disease.

3. How is power defined in terms of physics?

Correct answer: a

Rationale: Power is defined as the rate at which work is done or the rate at which energy is transferred or converted.

4. Two objects with equal masses collide head-on, both initially moving at the same speed. After the collision, they stick together. What is their final velocity?

Correct answer: A

Rationale: In an inelastic collision like this, kinetic energy is not conserved, but momentum is. Since the total momentum before the collision was zero (equal and opposite velocities), it must be zero after the collision as well, resulting in both objects stopping.

5. Which of the following is an example of a polymer?

Correct answer: C

Rationale: Polyethylene is a polymer, consisting of a large number of repeating ethylene units. The other choices represent small organic compounds.

6. Which statement accurately describes the relationship between electron configuration and the periodic table?

Correct answer: B

Rationale: Elements within the same group have similar electron configurations in their outermost shell. This explains why elements in the same group often share similar chemical properties.

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