Q: What is the term for a substance that increases the rate of a chemical reaction but is not changed or used up in the reaction? Read this paragraph and choose the correct option from the provided answers: Some reactions need extra help to occur quickly. They need another substance, called a catalyst. A catalyst is a substance that increases the rate of a chemical reaction but is not changed or used up in the reaction. The catalyst can go on to catalyze many more reactions. Choices: - a mechanism - an acid - a contribute - a catalyst A:
a catalyst

(Question)
Q: Insects have a highly specialized type of respiratory system called what? Read this paragraph and choose the correct option from the provided answers: Tracheal Systems Insect respiration is independent of its circulatory system; therefore, the blood does not play a direct role in oxygen transport. Insects have a highly specialized type of respiratory system called the tracheal system, which consists of a network of small tubes that carries oxygen to the entire body. The tracheal system is the most direct and efficient respiratory system in active animals. The tubes in the tracheal system are made of a polymeric material called chitin. Insect bodies have openings, called spiracles, along the thorax and abdomen. These openings connect to the tubular network, allowing oxygen to pass into the body (Figure 39.6) and regulating the diffusion of CO2 and water vapor. Air enters and leaves the tracheal system through the spiracles. Some insects can ventilate the tracheal system with body movements. Choices: - nasal system - gland system - grunion system - tracheal system A:
(Answer)
tracheal system

Ques: Q: What are oil in folded layers of rock called? Read this paragraph and choose the correct option from the provided answers: Geologists look for oil in folded layers of rock called anticlines ( Figure below ). Oil moves through permeable rock and is trapped by the impermeable cap rock. Choices: - oscillations - dendrites - macroparticle - anticlines A:
Ans: anticlines

(Q).
Q: What is the primary component of steel alloys? Read this paragraph and choose the correct option from the provided answers: Steels are a very important class of alloys. The many types of steels are primarily composed of iron, with various amounts of the elements carbon, chromium, manganese, nickel, molybdenum, and boron. Steels are widely used in building construction because of their strength, hardness, and resistance to corrosion. Most large modern structures like skyscrapers and stadiums are supported by a steel skeleton (see Figure below ). Choices: - carbon - titanium - alluminum - iron A:
(A).
iron

Ques:Q: What do we call the movement of individuals into a population from other areas? Read this paragraph and choose the correct option from the provided answers: Immigration is the movement of individuals into a population from other areas. This increases the population size and growth rate. Choices: - pilgrimage - nomadic - assimilation - immigration A:

Ans:immigration

Q: What is the term for water that falls from clouds? Read this paragraph and choose the correct option from the provided answers: Precipitation is water that falls from clouds. It may fall as liquid or frozen water. Types of frozen precipitation include snow, sleet, freezing rain, and hail. Choices: - lightning - atmosphere - wind - precipitation A:
precipitation