Seeds are made within the ovaries of some species of plants. Not all plants have the ability to produce seeds. Only those in the divisions Cycadophyta, Ginkgophyta, Gnetophyta, Coniferophyta and Anthophyta use seeds for reproduction. They are generated from the ovule of the mother plant and the pollen grain of the father plant.
A seed, which is generated in the ovule of the female plant, consists of several parts. The embryo is the structure that later grows into a mature plant. It contains one set of chromosomes from the mother plant and a second set from the father. There are four main parts of the embryo. The cotyledon is a seed leaf that stores food, the plumule and hypocotyle are the embryo plant's stem and shoot, and the radicle later develops into the plant's root. In addition to the embryo, the seed contains endosperm, which contains two sets of chromosomes from the mother and one from the father. The endosperm provides the plant with a food source as it germinates into a tiny plant. Both the embryo and the endosperm are encapsulated in a seed coat, which develops from the embryo sack of the mother plant's tissue. The seed coat is a tough, protective layer than prevents damage to the embryo and endosperm.Learn More
The scientific name of the ashoka tree is "Saraca indica." This small evergreen tree is native to India and is found at elevations up to 2,500 feet.Full Answer >
Seaweeds used in food and herbal medicine come from multicellular marine algae species that grow from the seabed as well as in many lakes and rivers. The term "seaweed" collectively refers to many varieties of plants that don't all share a common origin.Full Answer >
A plant node, also known as a leaf node or stem node, is the part of the plant that causes leaf growth. Nodes are located along the plant's stem. Finding plant nodes is important to effective pruning maintenance and also to regenerating plants by planting new roots.Full Answer >
Red algae can be found anywhere around the world, as it thrives in conditions ranging from polar to tropical waters. Red algae is commonly found in tide pools and coral reefs.Full Answer >