Answer:
Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
Explanation:
I believe that the best answer for this question would be spirillum. Spirillum is a genus of bacteria within the family of Spirillaceae. Typically, they are big, elongated, rigid, and spiral-shaped. Some have flagella tufts at either end. They are typically found in still freshwater. Hope this helps.
Answer:
Within the past 50 years, there has been a significant temperature increase on the Earth. Our world is getting dangerously warmer. Is it because of global warming? Some people, the climate change doubters, say there is no such thing. However, if you look at all the facts, you can clearly see that the temperature is rising. Humans are the reason for global warming and the temperature increase of the world.
Answer:
A) a single variable
Explanation:
An appropriately designed experiment usually involves only one independent variable. This allows the scientist to truly determine whether the variable manipulated is what had an effect on the subject. You may test more than one variable, but this is usually done or experimented separately, or one at a time.