*Question*
Q: What type of climates is malaria commonly found in? Read this paragraph and choose the correct option from the provided answers: Malaria is common in tropical and subtropical climates throughout the world (see Figure below ). In fact, malaria is one of the most common infectious diseases on the planet. Malaria is also a very serious disease. It kills several million people each year, most of them children. Choices: - tropic and arctic - tropical and permafrost - arid and arctic - tropical and subtropical A:
**Answer**
tropical and subtropical

*Question*
Q: What structure passes oxygen and nutrients to a growing fetus in mammals? Read this paragraph and choose the correct option from the provided answers: The majority of mammals are placental mammals. These are mammals in which the developing baby is fed through the mother's placenta. Female placental mammals develop a placenta after fertilization. A placenta is a spongy structure that passes oxygen, nutrients, and other useful substances from the mother to the fetus. It also passes carbon dioxide and other wastes from the fetus to the mother. The placenta allows the fetus to grow for a long time within the mother. Choices: - uterus - spinal cord - vas deferens - placenta A:
**Answer**
placenta

*Question*
Q: What is the diffusion of water molecules across a semipermeable membrane? Read this paragraph and choose the correct option from the provided answers: Osmosis is the diffusion of water molecules across a semipermeable membrane and down a concentration gradient. They can move into or out of a cell, depending on the concentration of the solute. Choices: - organelle motion - electrolysis - active transport - osmosis A:
**Answer**
osmosis

*Question*
Q: The product of a wave's wavelength and its frequency is what? Read this paragraph and choose the correct option from the provided answers: The product of a wave's wavelength () and its frequency (), , is the speed of the wave. Thus, for electromagnetic radiation in a vacuum: c = 2.998 10 8 ms 1 = Wavelength and frequency are inversely proportional: As the wavelength increases, the frequency decreases. The inverse proportionality is illustrated in Figure 6.3. This figure also shows the electromagnetic spectrum, the range of all types of electromagnetic radiation. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical legacies, different units are typically used for different parts of the spectrum. For example, radio waves are usually specified as frequencies (typically in units of MHz), while the visible region is usually specified in wavelengths (typically in units of nm or angstroms). Choices: - trough - velocity - amplitude - speed A:
**Answer**
speed