Answer the following question given this paragraph: Electrons at lower energy levels, which are closer to the nucleus, have less energy. At the lowest energy level, which has the least energy, there is just one orbital, so this energy level has a maximum of two electrons. Q: What happens to the energy levels of electrons as they are closer to the nucleus? Choices: - they are higher - they balance - they divide - they are lower A:
they are lower
(Question)
Answer the following question given this paragraph: Biochemical reactions are optimal at physiological temperatures. For example, most biochemical reactions work best at the normal body temperature of 98.6F. Many enzymes lose function at lower and higher temperatures. At higher temperatures, an enzyme's shape deteriorates. Only when the temperature comes back to normal does the enzyme regain its shape and normal activity. Q: Normal body temperature is ideal for most of what type of reactions? Choices: - gas - plasma - theoretical - biochemical A:
(Answer)
biochemical
Ques: Answer the following question given this paragraph: The partial geologic time scale in Figure below shows when some of the major events in animal evolution took place. The oldest animal fossils are about 630 million years old, so presumably animals evolved around that time or somewhat earlier. The earliest animals were aquatic invertebrates. The first vertebrates evolved around 550 million years ago. By 500 million years ago, most modern phyla of animals had evolved. The first terrestrial animals evolved about 50 million years after that. Q: The earliest animals were which kind of invertebrates? Choices: - insects - mammals - dinosaurs - aquatic A:
Ans: aquatic
(Q).
Answer the following question given this paragraph: Q: Foresters commonly inoculate pine seedlings with a type of what to promote growth? Choices: - yeast - soil - proteins - fungi A:
(A).
fungi
Ques:Answer the following question given this paragraph: Imagine a huge bar magnet passing through Earth's axis, as in the Figure below . This is a good representation of Earth as a magnet. Like a bar magnet, Earth has north and south magnetic poles. A magnetic pole is the north or south end of a magnet, where the magnet exerts the most force. Q: What is the name of the region of a magnet that has the most pull? Choices: - center - grid - tail - pole A:

Ans:pole
Answer the following question given this paragraph: To return to the first image, these cars travel a distance of 500 miles over the course of the race. However, they are traveling in a circle, and the start and finish line are the same. Therefore, when the car finishes the race, it is in essentially the same position it was when it started. The car's total displacement is only a few feet. Q: In a car race on a circular track, where the start and finish line are the same, what quantity is neglible? Choices: - total acceleration - partial displacement - total distance - total displacement A:
total displacement