Plants are necessary because they are a primary food source and provide the oxygen that is vital to animals' and humans' existence. A majority of the calories that people consume comes from plants, and most meat comes fr... More »

Plant tomato plants by choosing a good site in which to grow them, preparing the soil, and planting the tomatoes in a hole large enough to accommodate the root ball. Pinch off the lower branches, water the plant well, an... More » Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

To grow sorghum in the garden, fertilize and prepare the soil on flat ground or in a bed, and plant seeds 1 to 2 inches deep at a rate of one seed every 4 inches in rows 20 to 30 inches apart. Plant seeds deeper in light... More » Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

Plants and plant-derived materials provide humans with everything from oxygen, food and medicinally active chemical compounds to building materials, rope and paper pulp. Plants are also used to beautify both indoor and o... More »

Photosynthesis is the ultimate source of the energy for all the food that humans require, as well as the source of the energy used to build the biological materials that humans use, such as wood, cotton and wool. It is a... More »

Common plants during the Cenozoic Era included moss, grass and flowering plants, as well as edible crops late in the period when humans began to learn how to grow their own food. Plant life began to flourish during the C... More »

Humans need plants for a number of reasons, with the two most important ones being to provide oxygen and food. Additionally, plants give fuel, fiber, medicine and materials for shelter. They can also be useful in cleanin... More »