Ques: Q: If both atoms are the same, they have the same electronegativity and share what type of bond? Read this paragraph and choose the correct option from the provided answers: Choices: - metabolic - ionic - isotopic covalent - nonpolar covalent A:
Ans: nonpolar covalent

Ques: Q: What is the tissue beneath a mollusks' shell called? Read this paragraph and choose the correct option from the provided answers: Mollusks have ventral nerve cords. The tissue beneath the shell is called the mantle. The mantle cavity contains hemolymph. Figure 15.33 Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. In vertebrate fishes, the pharyngeal slits become the gills. Humans are not chordates because humans do not have a tail. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column. Choices: - cartilage - skin - mucous - mantle A:
Ans: mantle

Ques: Q: During what time period did poor air quality become a problem? Read this paragraph and choose the correct option from the provided answers: Poor air quality started to become a serious problem after the Industrial Revolution. The machines in factories burned coal. This released a lot of pollutants into the air. After 1900, motor vehicles became common. Cars and trucks burn gasoline, which adds greatly to air pollution. Choices: - Chernobyl disaster - coal industry boom - second world war - industrial revolution A:
Ans: industrial revolution

Ques: Q: Because charges must have an unbroken path to follow, electric current cannot flow through a material unless it forms what? Read this paragraph and choose the correct option from the provided answers: Look at the battery and light bulb in Figure below . The light bulb works and it's connected to the battery, but it won't light. The problem is the loose wire on the left. It must be connected to the positive terminal of the battery in order for the bulb to light up. The reason? Electric current can flow through a material such as a wire only if the material forms a closed loop. Charges must have an unbroken path to follow between the positively and negatively charged parts of the voltage source, in this case, the battery. Choices: - complete loop - closed area - total loop - closed loop A:
Ans:
closed loop