Answer the following question given this paragraph: Q: The cells of what basic plant structure lack chloroplasts? Choices: - leaf - stem - ferns - root A:
root
Answer the following question given this paragraph: Not all atoms of an element must have precisely the same mass. Atoms of one element can be transformed into another through nuclear reactions. The compositions of many solid compounds are somewhat variable. Under certain circumstances, some atoms can be divided (split into smaller particles). These modifications illustrate the effectiveness of the scientific method; later experiments and observations were used to refine Dalton's original theory. Q: Atoms of one element can be transformed into another through which process? Choices: - magnetic reactions - longer reactions - developed reactions - nuclear reactions A:
nuclear reactions
Q: Answer the following question given this paragraph: The epidermis also contains melanocytes , which are cells that produce melanin. Melanin is the brownish pigment that gives skin much of its color. Everyone has about the same number of melanocytes, but the melanocytes of people with darker skin produce more melanin. The amount of melanin produced is determined by heredity and exposure to UV light, which increases melanin output. Exposure to UV light also stimulates the skin to produce vitamin D . Because melanin blocks UV light from penetrating the skin, people with darker skin may be at greater risk of vitamin D deficiency. Q: People with which skin type run a greater risk of vitamin d deficiency? Choices: - lighter skin - brighter skin - weaker skin - darker skin A:
A: darker skin
Question: Answer the following question given this paragraph: Climate influences the types of plants and animals that inhabit a specific biome. Q: What influences the types of plants and animals that inhabit a specific biome? Choices: - carbon - Water - cooling - climate A:
Answer: climate
*Question*
Answer the following question given this paragraph: In some chordates, all four traits persist throughout life and serve important functions. However, in many chordates, including humans, all four traits are present only during the embryonic stage. After that, some of the traits disappear or develop into other organs. For example, in humans, pharyngeal slits are present in embryos and later develop into the middle ear. Q: In humans, pharyngeal slits later develop into what? Choices: - inner ear - outer ear - long ear - middle ear A:
**Answer**
middle ear
Answer the following question given this paragraph: The heating curve shown is for water but other substances have similarly shaped heating curves. Suppose you begin with solid water (ice) at -30C and add heat at a constant rate. The heat you add in the beginning will be absorbed as kinetic energy and the temperature of the solid will increase. When you reach a temperature of 0C (the melting point for water), the heat you add is no longer absorbed as kinetic energy. Instead, the added heat is absorbed as potential energy and the particles separate from each other. During the flat part of the curve labeled "melting", heat is being added constantly but the temperature does not increase. At the left edge of this flat line, the water is solid; by the time enough heat has been added to get to the right edge, the water is liquid, but maintains the same temperature. Once all the water is in the liquid form, the added heat will once again be absorbed as kinetic energy and the temperature will increase again. During the time labeled "water being heated as a liquid", all the added heat is absorbed as kinetic energy. Q: In what form is the heat absorbed when you heat ice and it reaches a temperature of 0 c? Choices: - geothermal energy - mechanical energy - radiation energy - potential energy A:
potential energy