Answer the following question given this paragraph: Puberty is the stage of life when a child becomes sexually mature. Puberty begins when the pituitary gland tells the testes to secrete testosterone in boys, and in girls the pituitary gland signals the ovaries to secrete estrogen. Changes that occur during puberty are discussed in the Male Reproductive Development and Female Reproductive Development concepts. Q: What is the name of the stage of life when a child becomes sexually mature? Choices: - pre-adolescence - adulthood - reproductive stage - puberty A:
puberty
(Question)
Answer the following question given this paragraph: Q: Introduction of antigens into the body through immunization can confer what benefit? Choices: - active respiration - growth rate - sensitive immunity - active immunity A:
(Answer)
active immunity
Ques: Answer the following question given this paragraph: Amphibians are vertebrates that exist in two worlds. They divide their time between freshwater and terrestrial habitats. They share a number of features with air-breathing lungfish, but they also differ from lungfish in many ways. One way they differ is their appendages. Amphibians are the first true tetrapods, or vertebrates with four limbs. Modern amphibians include frogs, salamanders, and caecilians, as shown Figure below . Q: Vertebrates with four limbs are also called what? Choices: - Amphibians - Birds - Mammals - tetrapods A:
Ans: tetrapods
(Q).
Answer the following question given this paragraph: This inverse relationship between solubility and temperature can be understood by looking at a molecular model. Recall that higher temperatures are associated with faster particles. Gas particles are held in solution by attractive interactions with the solvent molecules. If the particles are moving slowly, these attractive forces will pull back any particles that try to escape the surface of the solution and re-enter the gas phase. However, if the gas particles are moving fast enough, these interactions will not be sufficiently strong to prevent this process from occurring. As a result, more particles are able to escape, and the amount of dissolved solute is less than it would be at a lower temperature. Q: This inverse relationship between solubility and temperature can be understood by looking at a what? Choices: - nutrient model - a slide - potassium model - molecular model A:
(A).
molecular model
Ques:Answer the following question given this paragraph: Arachnids also have two additional pairs of appendages. Describe these two pairs. Q: How many additional pairs of appendages do arachnids have? Choices: - 0 - 4 - 6 - 2 A:

Ans:2
Answer the following question given this paragraph: Plate movements cause continents to drift closer to the poles or the equator. Ocean currents also shift when continents drift. All these changes can affect Earth's temperature. Q: What causes continents to drift closer to the poles or the equator? Choices: - time - plate tectonics - earthquakes - plate movements A:
plate movements