GED Science - GED-Science FREE EXAM DUMPS QUESTIONS & ANSWERS

Which conclusion is best supported by the graph? Exhibit:

Exhibit

The pancreas regulates blood sugar level through two hormones: insulin and glucagon. When the blood sugar level is high, the pancreas releases insulin, which lowers the sugar level in the blood. When the blood sugar level is low, the pancreas releases glucagon, which causes the cells to release sugar.
Why do people who are diabetics have a high blood sugar level?

Animal populations are regulated by a variety of natural factors. Five of these factors are:
- competition-A struggle among rival organisms results when available resources
(for example, food or shelter) are limited. - predation-Many animals pursue and eat other animals as prey. - disease-In overcrowded populations, the buildup of waste products contributes to
the easy spread of disease. - stress-In some populations, overcrowding can lead to hormonal disorders, which can cause abnormal behavior, thereby limiting the population. - natural disaster-The occurrence of storms, floods, and earthquakes can significantly affect a population's size.
- During the Middle Ages, the human population of Western Europe was severely reduced by a combination of unsanitary conditions and the abundance of flea-infested rats that spread the plague.
Based on the information provided, which of the following factors was responsible for the population reduction?

A liquid's boiling point is the temperature at which the pressure of its escaping vapor is equal to the atmospheric pressure.
Reduced pressure on the surface of a liquid results in a reduction in the vapor pressure needed for boiling to occur. At higher elevations, thinner air causes a reduction in atmospheric pressure, and liquids boil at lower temperatures.
At lower elevations, the atmospheric pressure is higher, and liquids boil at higher temperatures.

If Diane boiled water for coffee while camping in the mountains, which statement best describes what would happen to the water?

If a weight with a string attached is swung in a horizontal circular motion around in the air, the path of the weight will appear as shown in the figure at the left.
If the string breaks when the weight is at position A, the weight will fly away in a straight line tangent to the circular path.

In order for the weight to hit an object located at position X, the person should let go of the string when the weight is located at which position?

Work is done on an object when a force is applied, causing the object to move.

Which example best illustrates this scientific idea?

Flowers are the reproductive part of some plants. The stamen is the male reproductive organ while the pistil is the female organ. At the tip of the stamen is the anther, which forms pollen grains in which the sperm cells are formed. Pollen grains are transferred to the pistil by wind, water, insects, and other mechanisms.
Which statement best interprets the diagram and information?
Exhibit:

Every radioactive element has a specific half-life, which is the amount of time it takes one-half of a sample to decay. The following graph shows the radioactive decay of 2000 grams
(g) of Iodine-131. Iodine-131 has a half-life of about 8 days. So after 8 days, one half of the original sample, or 1000 g, of Iodine-131 remains.

Using the graph on the left, how much of the original 2000 g of Iodine-131 will remain after it has undergone radioactive decay for 16 days?

A physical change is a change that occurs in a substance without the formation of a different substance. In a chemical change, new substances are formed.
Which situation is an example of a chemical change?

Exhibit:
Which title best describes the diagram?

During cellular respiration, glucose and oxygen combine to yield energy. Water and carbon dioxide are formed as by-products. In this process, energy is released and stored in high-energy bonds of adenosine triphosphate (ATP). As it is needed, energy for the work of the cell is released by breaking the high-energy ATP bonds.
Which is the fundamental purpose of the process of respiration?

Many years ago, beavers were introduced to a region of California that they had not previously inhabited. Forty years later, the beaver population had grown so much that a cluster of aspen trees used by the beavers for food and building materials inside the national forest became endangered. The beavers were also interfering with the water systems.
In retrospect, how would biologists most likely evaluate the impact of the introduction of the beaver?

Some minerals, including iron, are necessary for plant growth. Other minerals are needed to help the plant use these minerals. Recently, scientists found that nickel is necessary for plants to absorb iron from the soil. Without iron, plants cannot carry on photosynthesis.
What will happen if there is insufficient nickel in the soil?

What behaviors do birds use for navigation?