Cartilage and bone, two key types of supporting connective tissue, assist the body to maintain its posture and protect internal organs.
The collenchyma, which is made up of living cells, the sclerenchyma, which is made up almost entirely of dead cells, and the vascular tissue, which is made up of both living and dead cells. It's in charge of transporting and dispersing water, nutrients, and assimilates.
Plants absorb carbon dioxide, water and sunlight to make their own food, grow and release oxygen through photosynthesis. They're a huge part in keeping our air clean.
There are four principles at work in evolution—variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
