Autotrophs are organisms that make their own food. Example: plants
Because it looses it's science-street-cred if it can't be replicated.
Essentially.
If you can replicate an experiment you can prove that the results are not just a stroke of luck or happening by chance, but instead that the variables are causing the results and they will always as long as the factors of the experiment remain the same. That is the definition of a <em>scientific</em> experiment.
Physical changes<span> are </span>changes<span> affecting the form of a chemical </span>substance<span>, but not its chemical composition. </span>Physical changes<span> are used to separate mixtures into their component compounds, but </span>can<span> not usually be used to separate compounds into chemical elements or simpler compounds.</span>
Number 2 is Blackland Prairies
The Blackland Prairies region is named for the deep, fertile black soils that characterize the area.
Answer:
B and C
Explanation:
Selective breeding is a procedure that involves the purposeful breeding of selected parents in order to give rise to offsprings with desired traits. Selective breeding procedure has its own advantages, which includes the ability to produce more animal products such as milk, meat etc, however, it has disadvantages.
The disadvantages include that:
- Selectively bred animals are more likely to have some health problem
- Some desirable traits become more common in a population.