Answer the following question given this paragraph: The pupil is an opening in the front of the eye. It looks black because it doesn't reflect any light. It allows light to enter the eye. The pupil automatically gets bigger or smaller to let more or less light in as needed. Q: What is the opening in the front of the eye? Choices: - the macula - the iris - the cornea - the pupil A:
the pupil
Answer the following question given this paragraph: The properties of matter, both physical and chemical, depend on the substances that matter is made of. Matter can exist either as a pure substance or as a combination of different substances. Q: Matter can exist either as a pure substance or as a combination of what? Choices: - Different Liquids - much substances - different vapors - different substances A:
different substances
Q: Answer the following question given this paragraph: Some arthropods have special excretory structures. They are called coxal glands and Malphigian tubules. Coxal glands collect and concentrate liquid waste from blood. They excrete the waste from the body through a pore. Malphigian tubules carry waste from the digestive tract to the anus. The waste is excreted through the anus. Q: In arthropods, coxal glands and malphigian tubules perform what role? Choices: - ingestion - reproduction - photosynthesis - excretion A:
A: excretion
Question: Answer the following question given this paragraph: Pea plants are naturally self-pollinating. In self-pollination , pollen grains from anthers on one plant are transferred to stigmas of flowers on the same plant. Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. Then he pollinated them by hand with pollen from other parent plants of his choice. When pollen from one plant fertilizes another plant of the same species, it is called cross-pollination . The offspring that result from such a cross are called hybrids. Q: What is it called when pollen from one plant fertilizes another plant of the same species? Choices: - cross-typing - cross-breeding - cross - vegetation - cross-pollination A:
Answer: cross-pollination
*Question*
Answer the following question given this paragraph: Normally blood needs to flow freely through our arteries. Plaque in an artery can restrict the flow of blood. As you can probably imagine, this is not an ideal situation. And eating right, exercising, and not smoking can help keep your arteries healthy. Q: What impact can plaque in an artery have on the flow of blood? Choices: - no effect - allergic reaction - increased flow - restriction A:
**Answer**
restriction
(Question)
Answer the following question given this paragraph: Objects that are launched into the air are called projectiles . The path followed by a projectile in motion is called a trajectory . The image of the snowboarder in the chapter introduction showed his trajectory; every object has a trajectory even when we cannot see it. Projectile motion , or the object's trajectory, is described in terms of position, velocity, and acceleration. Even with only an object's current location, velocity, and acceleration, we can calculate when and where the object will land. Our knowledge that perpendicular components of vectors do not affect each other allow us to easily analyze the motion of projectiles. Q: What are objects that are launched into the air called? Choices: - booms - stones - shoots - projectiles A:
(Answer)
projectiles