Answer:
A steel frame used to make a bike.
The correct answer is that mammals use a closed, double loop , four chambered heart as a circulatory system of the body.
The circulatory system of mammals is closed system that consists of four chambers, two articles and two ventricles. The deoxygenated blood comes into the heart from one loop and the oxygenated blood from other loop from the heart is circulated to the whole body. This is called as double circulation.
To maintain pressure within plant cells and keep structure while growth ensues. Good luck, milady. *Tips his fedora*
The process that occurs before hypothesis is Identifying the variables.
The correct answer is A) Encoding genetic information
