Q: What are the two major atmospheric gases?   Read this paragraph and choose the correct option from the provided answers:  The major atmospheric gases are nitrogen and oxygen. The atmosphere also contains minor amounts of other gases, including carbon dioxide.   Choices:  - carbon and helium  - nitrogen and hydrogen  - hydrogen and oxygen  - nitrogen and oxygen   A:
nitrogen and oxygen
Q: When pumping blood, the hearts of animals with very long necks must overcome what force?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - erosion  - evolution  - friction  - gravity   A:
gravity
Q: Q: What do we call structures that are similar in related organisms because they were inherited from a common ancestor?   Read this paragraph and choose the correct option from the provided answers:  Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants. Figure below shows the hands of several different mammals. They all have the same basic pattern of bones. They inherited this pattern from a common ancestor. However, their forelimbs now have different functions.   Choices:  - monogamous  - polylogous  - filamentous  - homologous   A:
A: homologous
Question: Q: What percentage of all species that ever lived on earth have gone extinct?   Read this paragraph and choose the correct option from the provided answers:  Over 99 percent of all species that ever lived on Earth have gone extinct. Five mass extinctions are recorded in the fossil record. They were caused by major geologic and climatic events. Evidence shows that a sixth mass extinction is occurring now. Unlike previous mass extinctions, the sixth extinction is due to human actions.   Choices:  - 25%  - 50%  - 93 %  - 99%   A:
Answer: 99%
*Question*
Q: Energy that is released when a chemical reaction takes place is known as what?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - liquid energy  - consequence energy  - thermal energy  - chemical energy   A:
**Answer**
chemical energy
Q: Q: Alterations that change chromosome structure are known as?   Read this paragraph and choose the correct option from the provided answers:  Chromosomal alterations are mutations that change chromosome structure.   Choices:  - lesions  - traits  - deformities  - mutations   A:

A: mutations