GED Science Life Science 5

Question 1

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They cannot reproduce or carry out metabolism without a host cell

Answer

Viruses lack the ability to independently reproduce or perform metabolic functions — they require a host cell's machinery to do so.

Question 2

A biome characterized by permafrost, very low temperatures, and low-growing mosses and lichens is the:

Accepted Answer

Tundra

Answer

The tundra biome is defined by its frozen subsoil (permafrost), harsh cold climate, and limited vegetation such as mosses, lichens, and dwarf shrubs.

Question 3

In the carbon cycle, which process removes carbon dioxide from the atmosphere?

Accepted Answer

Photosynthesis

Answer

Photosynthesis uses carbon dioxide and sunlight to produce glucose, removing CO₂ from the atmosphere and storing carbon in organic compounds.

Question 4

A scientist cross-pollinates two pea plants: one with purple flowers (PP) and one with white flowers (pp). What percentage of offspring will have purple flowers?

Accepted Answer

100%

Answer

All offspring of a PP × pp cross are Pp (heterozygous), and since purple is dominant, 100% will display purple flowers.

Question 5

Which body system is primarily responsible for fighting infections and maintaining immunity?

Accepted Answer

Lymphatic/immune system

Answer

The lymphatic and immune system produces and deploys white blood cells and antibodies to identify and destroy pathogens.

GED Practice Test

GED Practice Test

GED Science Life Science 5