Answer the following question given this paragraph: A low level of radiation occurs naturally in the environment. This is called background radiation. One source of background radiation is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space. Background radiation is generally considered to be safe for living things. You can learn more about background radiation with the animation at this URL: http://www. pbs. org/wgbh/nova/dirtybomb/sources. html. Q: A low level of radiation occurs naturally in the environment and is called what? Choices: - Gamma radiation - Beta radiation - Alpha radiation - background radiation A:
background radiation
(Question)
Answer the following question given this paragraph: Q: Data from paleontology offer insights into the early evolution of what? Choices: - cells - acids - neurons - fungi A:
(Answer)
fungi
Ques: Answer the following question given this paragraph: a deep hole in the seafloor where subduction takes place; trenches are the deepest places on Earth. Q: What is the term for the deepest places on earth? Choices: - the core - tunnels - mines - trenches A:
Ans: trenches
(Q).
Answer the following question given this paragraph: Looking at different types of competition, ecologists developed the competitive exclusion principle . The principle states that species less suited to compete for resources will either adapt, move from the area, or die out. In order for two species within the same area to coexist, they may adapt by developing different specializations. This is known as character displacement . An example of character displacement is when different birds adapt to eating different types of food. They can develop different types of bills, like Darwin's Finches ( Figure below ). Therefore, competition for resources within and between species plays an important role in evolution through natural selection . Q: What is the concept by which two species within the same area to coexist by adapting by developing different specializations? Choices: - character development - feature displacement - character concept - character displacement A:
(A).
character displacement
Ques:Answer the following question given this paragraph: As plant cells grow, they also become specialized into different cell types. Once cells become specialized, they can no longer divide. So how do plants grow after that? The key to continued growth is meristem. Meristem is a type of plant tissue consisting of undifferentiated cells that can continue to divide. Q: Once a plant cell becomes specialized, what can they no longer do? Choices: - photosynthesis - cellular respiration - osmosis - divide A:

Ans:divide
Ques:Answer the following question given this paragraph: Q: What occurs after gametes fuse and form a diploid zygote? Choices: - transcription - electrolysis - reproduction - meiosis A:

Ans:
meiosis