I think the correct answer is C. An investigation is a type of research that involves observation and collection of data but it does not include a control. In an investigation, all data and information that is related to the subject matter are collected it does not think of any factors that may affect the subject.
A 5-carbon base, C,A,G,T are the 5 bases available
Habitats outside the preserve area become damaged by overdevelopment.
They have two pairs of main nerve cords organized around a number of paired ganglia. while they don't have a "true brain"-- they have somewhat of a nervous system, composed of the two, or three pairs of nerve cords contained in the visceral mass.
Small or large disasters can easily cause genetic drift to small populations because the population is small. There are not enough of them to keep the area populated when a natural disaster occurs sometimes
