Answer:
c. Only 1, 2, and 3 are correct.
Explanation:
Metabolism includes all the chemical reactions that occur inside a living cell. Metabolism consists of multistep chemical pathways. The metabolic pathways are of two types: catabolic pathways and anabolic pathways. The catabolic pathways are the chemical pathways that breakdown the complex substances in the simpler ones and result in the release of energy. Catabolism is exergonic in nature.
On the other hand, anabolic chemical pathways form complex substances from the simpler elements and require an input of energy. The formation of long chains of the polypeptide by joining monomer amino acids together is an example of anabolism. The breakdown of the polypeptide chain into the amino acids is an example of catabolism.
The correct answer is the last one
Many Preserved both hard and soft body parts
Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.
Particles or molecules that are too big to fit through regular pores in the cell membrane, or have to big an electric charge, against the current of passive transport ( lower to higher ).