Answer the following question given this paragraph: Natural Selection for a Polygenic Trait. Natural selection may affect the distribution of a polygenic trait. These graphs show three ways this can happen. Q: What evolutionary process may affect the distribution of a polygenic trait? Choices: - artificial selection - flow selection - characteristic selection - natural selection A:
natural selection
(Question)
Answer the following question given this paragraph: Group 1 of the periodic table consists of hydrogen and the alkali metals. Hydrogen is a very reactive nonmetal. The alkali metals are the most reactive metals. Q: Which group of the periodic table consists of hydrogen and the alkali metals? Choices: - group 2 - group 4 - group 3 - group 1 A:
(Answer)
group 1
Ques: Answer the following question given this paragraph: All chemical reactions need energy to get started. Even reactions that release energy need a boost of energy in order to begin. The energy needed to start a chemical reaction is called activation energy . Activation energy is like the push a child needs to start going down a playground slide. The push gives the child enough energy to start moving, but once she starts, she keeps moving without being pushed again. Activation energy is illustrated in Figure below . Q: What is the amount of energy required to begin a chemical reaction known as? Choices: - decomposition energy - reaction energy - positive energy - activation energy A:
Ans: activation energy
(Q).
Answer the following question given this paragraph: Flickr:futureatlas. com (http://futureatlas. com/blog/). Human activities like burning gasoline in cars are contributing to a global change in our climate . CC BY 2.0. Q: Burning gas to run our cars is an example of how human activity is contributing to what global event? Choices: - ozone change - carbon change - metamorphic change - climate change A:
(A).
climate change
Ques:Answer the following question given this paragraph: Q: Wind is one method for dispersal of what, ensuring a new generation? Choices: - dust - clouds - eggs - seeds A:

Ans:seeds
Ques: Answer the following question given this paragraph: A molecule is any combination of two or more atoms. The oxygen in the air we breathe is two oxygen atoms connected by a chemical bond to form O 2 , or molecular oxygen. A carbon dioxide molecule is a combination of one carbon atom and two oxygen atoms, CO 2 . Because carbon dioxide includes two different elements, it is a compound as well as a molecule. Q: What term is used for any combination of two or more atoms? Choices: - element - synthesis - nucleus - molecule A:
Ans:
molecule