. It can lead to changes in allele frequencies and the evolution oftraits.
Answer:
In animals that give live birth, the fetal circulation is the circulatory system of a fetus. The term usually encompasses the entire fetoplacental circulation, which includes the umbilical cord and the blood vessels within the placenta that carry fetal blood.
Answer: Control Group is like a regular experiment
Explanation: Example:
A drop of mint juice with a mint gum will strengthen your breath.
Control Group- Mint gum
Independent Variable- Mint juice.
Dependent Variable- Breath (Being measured)