It depends on the case, but usually two variables should be in a controlled experiment.
<u>Answer:</u>
Common ancestor is the main factor that determines that all terrestrial animals are quadrupedal.
<u>Explanation:</u>
- Phylogeny means the evolution of the organisms or genetically related organism and how they are related.
- The study of phylogeny is called as phylogenetics. Terrestrial means those who live on land.
- Mammals are one who gives birth to their offspring directly. They are generally warm-blooded, breath air.
- Studying each state of the ancestor and also tracing the organism characteristics during evolution.
Answer:
I think it all comes down to a moral or religious point of view. Also It poses a risk to civilization as we don't know exactly the consequences of doing such a huge thing. We don't know the dangers of human cloning and what could go wrong if unsuccessful.
*that's all I got man hope this helps lol
Explanation:
<span>Males and females are attracted to each other in order to ensure the viability and fertility of the offspring, which is also why it is uncommon that males of one species be attracted to females of another. Members of two different species cannot mate and thus cannot produce fertile, viable offspring, unless they are part of different sub-species. But they must be part of the same species.
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Stress is not a symptom of Gingivitis.
