Answer:
The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.
Answer:
sorry I don't understand your question
Answer:
C. nudation
Explanation:
When an ecological system has been destroyed by some catastrophe, what is left is usually barren land. This barren land is not suitable for the majority of the organisms to live on it, so changes are needed. Nudation is the first process, and it is part of the primary succession. This process is actually the one responsible for the minor changes that happen on the barren land, preparing it slowly for the organisms to be able to move into it and start developing a new ecosystem.
Answer:
This trait is rare when it occurs. Some genes depend on other genes to be expressed, so in most cases a trait is denied an expression. But its still there, so it passes down to generation until it gets expressed.
Explanation:
Mendel was the first person to succeed in predicting how traits are inherited from generation to generation.