Answer the following question given this paragraph: Another major problem caused by air pollution is global climate change. Gases such as carbon dioxide from the burning of fossil fuels increase the natural greenhouse effect. This raises the temperature of Earth's surface. Q: What gas is contributing to the greenhouse effect? Choices: - nitrogen - oxygen - sodium chloride - carbon dioxide A:
carbon dioxide
(Question)
Answer the following question given this paragraph: Eukaryotic cells contain a nucleus and several other types of organelles. These structures are involved in many vital cell functions. Q: What type of cell contains a nucleus? Choices: - candid cell - endogenous cell - chloroplasts cell - eukaryotic cell A:
(Answer)
eukaryotic cell
Ques: Answer the following question given this paragraph: At certain times of year, a stream or river may overflow its banks. The area of land that is flooded is called the floodplain. The floodplain may be very wide where the river flows over a nearly flat surface. Q: At certain times of year, a stream or river may overflow its banks. what is the area of land that is flooded called? Choices: - inlet - run off - lowland - floodplain A:
Ans: floodplain
(Q).
Answer the following question given this paragraph: The body of a cnidarian consists of two cell layers, ectoderm and endoderm. The cells surround a digestive cavity called the coelenteron (see Figure below ). Cnidarians have a simple digestive system. The single opening is surrounded by tentacles, which are used to capture prey. The tentacles are covered with nematocyst cells. Digestion takes place in the coelenteron. Nutrients are absorbed and gases exchanged through the cells lining this cavity. Fluid in the coelenteron creates a hydrostatic skeleton. Q: Cnidarians have a simple digestive system with a single opening surrounded by what type of structures, which are used to capture prey? Choices: - spines - antennae - claws - tentacles A:
(A).
tentacles
Ques:Answer the following question given this paragraph: 12.7 Molecular Transport Phenomena: Diffusion, Osmosis, and Related Processes Diffusion There is something fishy about the ice cube from your freezerhow did it pick up those food odors? How does soaking a sprained ankle in Epsom salt reduce swelling? The answer to these questions are related to atomic and molecular transport phenomenaanother mode of fluid motion. Atoms and molecules are in constant motion at any temperature. In fluids they move about randomly even in the absence of macroscopic flow. This motion is called a random walk and is illustrated in Figure 12.20. Diffusion is the movement of substances due to random thermal molecular motion. Fluids, like fish fumes or odors entering ice cubes, can even diffuse through solids. Diffusion is a slow process over macroscopic distances. The densities of common materials are great enough that molecules cannot travel very far before having a collision that can scatter them in any direction, including straight backward. It can be shown that the average distance x rms that a molecule travels is proportional to the square root of time:. Q: What is the term for the movement of substances due to random thermal molecular motion? Choices: - Transfusion - convection - condensation - diffusion A:

Ans:diffusion
Question: Answer the following question given this paragraph: contain the carbonyl functional group (C=O; part (a) in Figure 24.14 "The Oxidation State of Carbon in Oxygen- and Nitrogen-Containing Functional Groups"). Alcohols are classified as primary, secondary, or tertiary, depending on whether the OH group is bonded to a primary, secondary, or tertiary carbon. For example, the compound 5-methyl-3-hexanol is a secondary alcohol. Q: The bending of a wave around the edges of an opening or an obstacle is called this? Choices: - reflection - sputtering - absorption - diffraction A:
Answer:
diffraction