Answer the following question given this paragraph: All types of radioactive decay pose risks to living things, but alpha decay is the least dangerous. That's because alpha particles are relatively heavy, so they can travel only a few centimeters through the air. They also are not very penetrating. For example, they can't pass through a sheet of paper or thin layer of clothing. They may burn the skin, but they can't penetrate to the tissues underneath the skin. However, if alpha particles are emitted inside the body, they can do more damage. One way this can happen is by inhaling cigarette smoke. People who smoke actually inhale the radioactive element polonium-210. It undergoes alpha decay in the lungs. Over time, exposure to alpha particles may cause lung cancer. Q: What type of radioactive decay is generally only dangerous when emitted inside the body? Choices: - ionic decay - variant decay - nucleus decay - alpha decay A:
alpha decay
(Question)
Answer the following question given this paragraph: Only a very small percentage of Earth's water is fresh, liquid water on the surface. But that tiny fraction of water is vital. It is needed by humans, plants, and many other living things. Liquid freshwater flows over Earth's surface in streams and rivers. It also forms ponds, lakes, and wetlands. People use freshwater for drinking, washing, and industry. They also use it for fun. How do you use freshwater for fun?. Q: Only a small percent of earth's water is what type, as opposed to saltwater? Choices: - runoff - groundwater - rainwater - fresh A:
(Answer)
fresh
Ques: Answer the following question given this paragraph: Animals not only have specialized cells. Most animals also have tissues and organs. In many animals, organs form organ systems, such as a nervous system. Higher levels of organization allow animals to perform many complex functions. What can animals do that most other living things cannot? Here are some examples. All of them are illustrated in Figure below . Q: Groups of related organs form what? Choices: - community systems - maturation systems - artificial systems - organ systems A:
Ans: organ systems
(Q).
Answer the following question given this paragraph: Archaeplastida Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group. Molecular evidence supports that all Archaeplastida are descendents of an endosymbiotic relationship between a heterotrophic protist and a cyanobacterium. The red and green algae include unicellular, multicellular, and colonial forms. Red Algae Red algae, or rhodophytes, are primarily multicellular, lack flagella, and range in size from microscopic, unicellular protists to large, multicellular forms grouped into the informal seaweed category. The red algae life cycle is an alternation of generations. Some species of red algae contain phycoerythrins, photosynthetic accessory pigments that are red in color and. Q: In which supergroup are red algae and green algae included? Choices: - xerophyte - spirogyra - troglodyte - archaeplastida A:
(A).
archaeplastida
Ques:Answer the following question given this paragraph: which the articulating surfaces of the bones contact each other. Also unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly against each other, allowing for increased joint mobility. Q: Unlike fibrous or cartilaginous joints, the articulating bone surfaces at what joint type are not directly connected to each other with fibrous connective tissue or cartilage? Choices: - proximal joint - knee joint - polymeric joint - synovial joint A:

Ans:synovial joint
Answer the following question given this paragraph: Organic chemistry is the study of chemicals containing carbon. Carbon is one of the most abundant elements on Earth and is capable of forming a tremendously vast number of chemicals (over twenty million so far). Most of the chemicals found in all living organisms are based on carbon. Q: What type of chemistry is the study of chemicals containing carbon called? Choices: - inorganic chemistry - biochemistry - bioanalytical chemistry - organic chemistry A:
organic chemistry