GED Science Test #9

Question 1

Which of the following statements regarding sunlight is NOT correct?

Accepted Answer

Its speed is infinite.

Answer

Because light has a finite speed, the statement is untrue. It's enormous, but it's not limitless. The rest of the assertions are correct.

Question 2

Which of the following human genetics claims is correct?

Accepted Answer

Half the chromosomes in a human are inherited from the mother, and half from the father.

Answer

Every human being inherits 23 chromosomes from the mother and 23 chromosomes from the father in the normal course of events. However, because one parent's genes can be more dominant and genes from two parents can occasionally generate a blended impact, individuals do not look exactly 50 percent like the father and 50 percent like the mother. Fraternal twins are born at the same moment in the womb, but they are genetically no more similar than two siblings who are not twins. Fraternal twins result from the fertilization of two separate eggs by two different sperm cells. X-rays can cause chromosomal changes.

Question 3

When a chemical reaction occurs, what remains constant?

Accepted Answer

The number of atoms

Answer

During a chemical process, the number of atoms remains constant. The number of molecules in a cell can fluctuate . In photosynthesis, for example, 6 molecules of carbon dioxide and 6 molecules of water (for a total of 12 molecules) can combine to generate 1 molecule of glucose and  6 molecules of oxygen (total of 7 molecules). Similarly, the amount of gas and solid in a container can fluctuate . Because the quantity of disorder in the universe is continually rising, a reaction isn't required to keep it constant.

Question 4

Which of the following statements is NOT correct?

Accepted Answer

All organisms have a cell wall.

Answer

The claim is untrue. Animal cells do not often have a cell wall. Other assertions are correct.

Question 5

Humans have four blood types: A, B, AB, and O. Because a person with blood type A has antibodies to type B, he or she is unable to receive type B blood. A person with blood type B, on the other hand, has antibodies against type A and cannot take type A blood. An AB blood type individual has no antibodies and can get blood from anyone. A person with type O blood has both A and B antibodies and can only accept blood from people who have the same blood type. Someone with type B blood can donate based on this information.

Accepted Answer

Blood groups B and AB

Answer

A person with blood type B can donate blood to individuals who lack B antibodies. Other people with type B blood (who only have antibodies for type A) and those with type AB blood (who don't have any antibodies) fall into this category.

GED Practice Test

GED Practice Test

GED Science Test #9