Gymnosperms are plants that do not flower and instead produce bare seeds or cones, as with the familiar pine tree.
Pine trees, of course, are of enormous economic importance. They grow quickly, and their wood is used to manufacture cheap construction materials such as particle board and plywood. Whole pines were the traditional material for ship masts, and their soft unprocessed wood continues to be used in woodworking. It is also a common firewood due to the low cost. Pulped pines produce the majority of paper manufactured.
Crude pine resin is commercially important. Rosin and oil of turpentine derived from the crude resin are used for applications ranging from oiling violin strings to making glue and soap on an industrial scale. Turpentine also has medical applications as an antispasmodic, a diuretic, a stimulant and an antibacterial.
Finally, pine nuts are used as food, the most famous recipe including them being pesto sauce.
Aside from pines, a gymnosperm called ginkgo is planted throughout major American cities as a street tree because it is resistant to pollution. Products made from ginkgo seeds are promoted by beverage manufacturers for their supposed neurological properties, said to promote alertness and memory.
Firs are used for their strong and attractive wood, which is relatively cheap due to the trees' rapid growth.
Spruce is important to the music industry as spruce wood is used to make high-quality soundboards for violins and guitars.
4. regional metamorphism
p.s. not sure if those answers are all correct.
(Read more on vascular plants here:21. B. ProducersPlankton turns carbon dioxide and sunlight into organic compound which is sugar.Seaweed and cyanobacteria are both important in water ecosystem. Seaweed is an ocean producer from algae family that grows only in shallow waters to get enough sunlight.
(Read more about producers on this link:22. D. BatsThey are the first consumer in the food chain that eats the producer.
(What is a first order consumer? Read the answer here:23. ArthopodsAedes Aegypti are yellow fever mosquito that spreads dengue while female Anopheles spread malaria.
(What is Phylum Arthropods? Read here:25. OxygenThe plants produces oxygen and sugar as product of photosynthesis. Humans and animals then inhales and uses oxygen.
(Read the process of photosynthesis on this link:
Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or “naked” seeds on the surface of scales or leaves.
Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or “naked” seeds on the surface of scales or leaves. Gymnosperm seeds are often configured as cones.
Gymnosperm produce bothe female and male cones by making each gametes needed in fertilization that makes heterosporous. Megaspores is made in cone and develop to female gametophyts inside the ovule of gymnosperm while the pollen grains develop from cone the produce microspores.
The gymnosperms, also known as Acrogymnospermae, are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes.
Gymnosperms - Ang isang pangkat ng binhi na gumagawa ng mga halaman na kabilang ang mga conifers, cycads, Ginkgo, at gnetophytes.