Plants are eukaryotic, meaning their cells have a nucleus. They form tissues, have multiple cells and create food through photosynthesis, which is the process of turning sunlight into energy.Know More
Another characteristic of plants is that they do not voluntarily move, though they may grow branches in a particular direction. Animals have to move in order to search for food, but plants remain stationary because they make their own food. While some marine plants float on water, they do not move of their own volition.
Most plants branch. Because sunlight, water and air are necessary for photosynthesis, the branching allows the plant to absorb as much of these necessities as possible. Unlike different species of animals that have a specific shape, plants of the same species do not have a preset shape or size. Both are influenced in part by the environment. The plant does not grow uniformly. Some parts grow faster than others.
Plants have neither a nervous system nor an excretory system. While plants respond to basic stimuli, they do not have a nervous system or sense organs to help them. Plants do not produce waste as animals do, which is why they do not have an excretory system. Instead, wastes like oxygen are released into the atmosphere through pores in the plant's surface.Learn more about Botany
Seedless vascular plants are relatively small plants that depend on flagellated sperm in water for the fertilization of their female gametes in their gametophyte stage, which are then reproduced via wind-blown spores. They are a minority of plant species, including ferns, whisk ferns, club mosses and horsetails. They were the dominant types of plants during the carboniferous period, but were out-competed by the later seeded vascular plants.Full Answer >
Plants are green because of a pigment called chlorophyll. Chlorophyll absorbs all colors of visible light except for green, which is reflected. Thus, the reflection of the green part of visible light is what causes plants to look green.Full Answer >
Plants provide food to people and animals, regulate the water cycle, create oxygen and provide a habitat for other species. Without plants, life on Earth would not be sustainable for most species, including humans.Full Answer >
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 from animals that eat plants. Plants are at the bottom of the food chain, and animals could not survive without them. Plants also release the oxygen that humans and animals breathe.Full Answer >