Answer the following question given this paragraph: The plasma membrane may have extensions, such as whip-like flagella or brush-like cilia. In single-celled organisms, like those shown in Figure below , the membrane extensions may help the organisms move. In multicellular organisms, the extensions have other functions. For example, the cilia on human lung cells sweep foreign particles and mucus toward the mouth and nose. Q: In single-celled organisms, plasma membrane extensions, such as whip-like flagella or brush-like cilia, aid in what? Choices: - sensation - sound - pressure - movement A:
movement
Answer the following question given this paragraph: Fertilization The fusion of a sperm and an egg is a process called fertilization. This can occur either inside ( internal fertilization) or outside ( external fertilization) the body of the female. Humans provide an example of the former, whereas frog reproduction is an example of the latter. Q: What is the process of the fusion of a sperm and an egg called? Choices: - Sperm - embryo - stimulation - fertilization A:
fertilization
Q: Answer the following question given this paragraph: Courtesy of the U. S. Food and Drug Administration (FDA). Asthma occurs when the bronchioles swell and the muscles around the bronchioles contract . Public Domain. Q: What occurs when the bronchioles swell and the muscles around the bronchioles contract? Choices: - bronchitis - nausea - allergies - asthma A:
A: asthma
Question: Answer the following question given this paragraph: Vestigial structures, or structures that have lost their use through evolution, are important evidence of evolution. Q: What do we call structures that have lost their use through evolution, which serve as important evidence of evolution? Choices: - extinct - adaptative - primordial - vestigial A:
Answer: vestigial
*Question*
Answer the following question given this paragraph: Muscles are the main organs of the muscular system. Muscles are composed primarily of cells called muscle fibers. A muscle fiber is a very long, thin cell, as you can see in Figure below . It contains multiple nuclei and many mitochondria, which produce ATP for energy. It also contains many organelles called myofibrils. Myofibrils allow muscles to contract, or shorten. Muscle contractions are responsible for virtually all the movements of the body, both inside and out. Q: Muscles are composed mostly of cells called what? Choices: - muscle organelles - muscle filament - muscle polymers - muscle fibers A:
**Answer**
muscle fibers
*Question*
Answer the following question given this paragraph: Sunlight is turned into electricity at a solar power plant. These power plants use a large group of mirrors to focus sunlight on one place. This place is called a receiver ( Figure below ). At the receiver, a liquid such as oil or water is heated to a high temperature. The liquid transfers its heat by conduction . In conduction, energy moves between two objects that are in contact. The higher temperature object transfers heat to the lower temperature object. For example, when you heat a pot of water on a stove top, energy moves from the pot to its metal handle by conduction. At a solar power plant, the energy conducted by the heated liquid is used to make electricity. Q: When you heat a pot of water on a stove top, energy moves from the pot to its metal handle by what process? Choices: - induction - convection - thermal radiation - conduction A:
**Answer**
conduction