Answer the following question given this paragraph: The most basic division of modern plants is between nonvascular and vascular plants. Vascular plants are further divided into those that reproduce without seeds and those that reproduce with seeds. Seed plants, in turn, are divided into those that produce naked seeds in cones and those that produce seeds in the ovaries of flowers. Q: What types of living things are divided into nonvascular and vascular groupings? Choices: - organs - mammals - animals - plants A:
plants
Answer the following question given this paragraph: Hydrocarbons are molecules that contain only carbon and hydrogen atoms. Because each carbon atom can form covalent bonds with up to four other atoms, very large and complex molecules can be formed just from these two elements. Hydrocarbons in which all carbons are connected by single bonds are known as alkanes . If a C=C double bond is present, the compound is now an alkene . A triple bond between two carbons (CC) makes the compound an alkyne . Hydrocarbons can also be broadly classified as either saturated , which means they contain no multiple bonds, or unsaturated , which means they contain at least one double or triple bond. Q: Hydrocarbons in which all carbons are connected by single bonds are called? Choices: - acids - enzymes - lipids - alkanes A:
alkanes
Q: Answer the following question given this paragraph: environment of the body's soft tissues. Barrier defenses are part of the body's most basic defense mechanisms. The barrier defenses are not a response to infections, but they are continuously working to protect against a broad range of pathogens. The different modes of barrier defenses are associated with the external surfaces of the body, where pathogens may try to enter (Table 21.2). The primary barrier to the entrance of microorganisms into the body is the skin. Not only is the skin covered with a layer of dead, keratinized epithelium that is too dry for bacteria in which to grow, but as these cells are continuously sloughed off from the skin, they carry bacteria and other pathogens with them. Additionally, sweat and other skin secretions may lower pH, contain toxic lipids, and physically wash microbes away. Q: The barrier defenses are not a response to infections, but they are continuously working to protect against a broad range of what? Choices: - mates - nutrients - ecosystems - pathogens A:
A: pathogens
Question: Answer the following question given this paragraph: Living in water does present challenges to plants, however. For one thing, pollination by wind or animals isn't feasible under water, so aquatic plants may have adaptations that help them keep their flowers above water. For instance, water lilies have bowl-shaped flowers and broad, flat leaves that float. This allows the lilies to collect the maximum amount of sunlight, which does not penetrate very deeply below the water's surface. Plants that live in moving water, such as streams and rivers, may have different adaptations. For example, cattails have narrow, strap-like leaves that reduce their resistance to the moving water (see Figure below ). Q: What kind of water are cattails adapted for with narrow, strap-like leaves? Choices: - stagnant water - saline water - turbulent water - moving water A:
Answer: moving water
*Question*
Answer the following question given this paragraph: Effusive eruptions rarely kill anyone because they move slowly. People can usually be evacuated before an effusive eruption. Still, effusive eruptions can be destructive. There is not much anyone can do to stop a lava flow from destroying a building or road ( Figure below ). Q: Why do effusive eruptions rarely kill anyone? Choices: - They are minor - They occur rarely - They are low temperature - they move slowly A:
**Answer**
they move slowly
(Question)
Answer the following question given this paragraph: There are two basic types of pollutants in air. They are known as primary pollutants and secondary pollutants. Q: What are two basic types of pollutants in the air? Choices: - smog and coal - organic and inorganic - pesticides and smog - primary and secondary pollutants A:
(Answer)
primary and secondary pollutants