Most have multicellular (some algae is unicellular), eukaryotic cells with cell walls . Plants can't move like animals, so they are sessile. Plants are autotrophs, meaning they make their own food through photosynthesis.
There are about 850 species of gymnosperms and more than 350,000 species of angiosperms living on the planet today.Sep 30, 2021
The two major types of seed plants are the gymnosperms (seeds in cones) and angiosperms (seeds in ovaries of flowers) .Nov 9, 2021
An estimate of about 25,000 species of seed plants for the combined two is thus probable, especially because many new taxa have been described since the Hnatiuk figure was published, and because little overlap exists between the two areas.
Some examples of such seeds include those of wheat, rice, maize, sorghum, barley, peanut, soybean, lentil, common pea, common bean, coconut, walnut, pecan, and sunflower . Many other seeds are eaten with their fruits, although it is generally the encasing fruit walls that are the sought-after source of nutrition.
Conifers are seed plants; they include pines, firs, yew, redwood , and many other large trees. The other major group of seed-plants are the flowering plants, including plants whose flowers are showy, but also many plants with reduced flowers, such as the oaks, grasses, and palms.
Plants in division Spermatophyta are characterized by the presence of seeds and are called seed plants; whereas the plants in all the other three divisions lack the presence of seeds and are called seedless plants.
Spermatophyte Seed plants Temporal range:Kingdom:PlantaeClade:TracheophytesClade:SpermatophytesDivisionsSpermatophyte - Wikipedia en.wikipedia.org › wiki › Spermatophyte