Important facts

• First food chains on earth appeared when animals started to depend on algae or plant consumers.
• With the arrival of many groups of animals, functioning food webs began to appear.
• Plants that colonized land possess vascular systems to(xylem and phloem) transport water and minerals and waterproof coating of wax to prevent the water loss.
• Arthropods, insects and spiders were the first group on animals to colonize on land.