Answer the following question given this paragraph: 23.4 Natural selection is the only mechanism that consistently causes adaptive evolution. Q: What is the only mechanism that consistently causes adaptive evolution? Choices: - genetic drift - neutral selection - artificial selection - natural selection A:
natural selection
Answer the following question given this paragraph: Irrigation can waste a lot of water. The type of irrigation shown in Figure below is the most wasteful. The water is sprayed into the air and then falls to the ground. But much of the water never reaches the crops. Instead, it evaporates in the air or runs off the fields. Irrigation water may cause other problems. The water may dissolve agricultural chemicals such as pesticides. When the water soaks into the ground, the dissolved chemicals do, too. They may enter groundwater or run off into rivers or lakes. Salts in irrigation water can also collect in the soil. The soil may get too salty for plants to grow. Q: Irrigation can waste a lot of what natural resource? Choices: - habitat - money - fertilizer - water A:
water
Q: Answer the following question given this paragraph: Another example of species loss due to habitat destruction happened on Madagascar's central highland plateau. From 1970 to 2000, slash-and-burn agriculture destroyed about 10% of the country's total native plants. The area turned into a wasteland. Soil from erosion entered the waterways. Much of the river ecosystems of several large rivers were also destroyed. Several fish species are almost extinct. Also, some coral reef formations in the Indian Ocean are completely lost. Q: What kind of agriculture destroyed about 10% of madagascar's native plants? Choices: - hybridization - crop rotation - fertilizer use - slash-and-burn A:
A: slash-and-burn
Question: Answer the following question given this paragraph: Superior Rotation and Inferior Rotation Superior and inferior rotation are movements of the scapula and are defined by the direction of movement of the glenoid cavity. These motions involve rotation of the scapula around a point inferior to the scapular spine and are produced by combinations of muscles acting on the scapula. During superior rotation, the glenoid cavity moves upward as the medial end of the scapular spine moves downward. This is a very important motion that contributes to upper limb abduction. Without superior rotation of the scapula, the greater tubercle of the humerus would hit the acromion of the scapula, thus preventing any abduction of the arm above shoulder height. Superior rotation of the scapula is thus required for full abduction of the upper limb. Superior rotation is also used without arm abduction when carrying a heavy load with your hand or on your shoulder. You can feel this rotation when you pick up a load, such as a heavy book bag and carry it on only one shoulder. To increase its weight-bearing support for the bag, the shoulder lifts as the scapula superiorly rotates. Inferior rotation occurs during limb adduction and involves the downward motion of the glenoid cavity with upward movement of the medial end of the scapular spine. Q: Inferior rotation occurs during limb adduction and involves the downward motion of what? Choices: - choroidal cavity - pelvic cavity - dialysate cavity - glenoid cavity A:
Answer: glenoid cavity
*Question*
Answer the following question given this paragraph: Eat well, get enough sleep, and be active every day. These healthy lifestyle choices will help keep your immune system healthy so it can fight off respiratory infections and other diseases. Q: What does a healthy immune system fight off? Choices: - microorganisms and other dieases - respiratory and other dieases - bacteria and viruses - infections and other dieases A:
**Answer**
infections and other dieases
(Q).
Answer the following question given this paragraph: called an alkaline battery when adapted to operate under alkaline conditions. Button batteries have a high output-to-mass ratio; lithiumiodine batteries consist of a solid electrolyte; the nickel cadmium (NiCad) battery is rechargeable; and the leadacid battery, which is also rechargeable, does not require the electrodes to be in separate compartments. A fuel cell requires an external supply of reactants as the products of the reaction are continuously removed. In a fuel cell, energy is not stored; electrical energy is provided by a chemical reaction. Q: In a fuel cell, energy is not stored; electrical energy is provided by what? Choices: - fusion reaction - carbon reaction - consumption reaction - chemical reaction A:
(A).
chemical reaction