Answer the following question given this paragraph: The majority of human genes have two or more possible alleles. Differences in alleles account for the considerable genetic variation among people. In fact, most human genetic variation is the result of differences in individual DNA bases within alleles. Q: How many possible alleles do the majority of human genes have? Choices: - three or more - two or less - less than four - two or more A:
two or more
(Question)
Answer the following question given this paragraph: Two species may often interact with each other and have a close relationship. Examples include flowers and the animals that pollinate them. When one of the two species evolves new traits, the other species may evolve matching traits. This is called coevolution . You can see an example of this in Figure below . The very long beak of this hummingbird co-evolved with the tubular flowers it pollinates. Only this species of hummingbird can reach nectar deep in the flowers. Q: What is it called when two species evolve matching traits? Choices: - Allopatric speciation - interconnection - spontaneous mutation - coevolution A:
(Answer)
coevolution
Ques: Answer the following question given this paragraph: (a) Initially, the system (a copper penny and concentrated nitric acid) is at atmospheric pressure. (b) When the penny is added to the nitric acid, the volume of NO2 gas that is formed causes the piston to move upward to maintain the system at atmospheric pressure. In doing so, the system is performing work on its surroundings. The symbol E in represents the internal energy of a system, which is the sum of the kinetic energy and potential energy of all its components. It is the change in internal energy that produces heat plus work. To measure the energy changes that occur in chemical reactions, chemists usually use a related thermodynamic quantity calledenthalpy (H) (from the Greek enthalpein, meaning "to warm"). The enthalpy of a system is defined as the sum of its internal energy E plus the product of its pressure Pand volume V:. Q: To measure what changes that occur in chemical reactions, chemists usually use a related thermodynamic quantity, calledenthalpy? Choices: - ion exchange - evaporation - entropy - energy A:
Ans: energy
(Q).
Answer the following question given this paragraph: The difference between aldehydes and ketones is the placement of the carbonyl group within the molecule. An aldehyde is an organic compound in which the carbonyl group is attached to a carbon atom at the end of a carbon chain. A ketone is an organic compound in which the carbonyl group is attached to a carbon atom within the carbon chain. The general formulas for each are shown below. Q: The difference between aldehydes and ketones is the placement of what group within the molecule? Choices: - benadryl - ammonia - nucleus - carbonyl A:
(A).
carbonyl
Ques:Answer the following question given this paragraph: Nuclear power plants produce electricity through induced fission. Q: Nuclear power plants produce electricity through what? Choices: - High Fission - intense fission - severe fission - induced fission A:

Ans:induced fission
Ques:Answer the following question given this paragraph: What's at the bottom of the food chain? A bit of the food energy comes from above, where plankton photosynthesize. Most comes from the coral. Coral are animals that live with tiny zooxanthellae that also photosynthesize. Of course, you know what's at the top of this food chain!. Q: What are animals that live with tiny zooxanthellae that also photosynthesize? Choices: - worms - bacteria - fungi - coral A:

Ans:
coral