@ryandeghelder4ปีที่แล้ว +39
Grass is a type of plant with narrow leaves growing from the base. Their appearance as a common plant was in the mid-Cretaceous period. There are 12,000 species now. [1]
A common kind of grass is used to cover the ground in places such as lawns and parks. Grass is usually the color green. That is because they are wind-pollinated rather than insect-pollinated, so they do not have to attract insects. Green is the best colour for photosynthesis.
Grasslands such as savannah and prairie where grasses are dominant cover 40.5% of the land area of the Earth, except Greenland and Antarctica. [2]
Grasses are monocotyledon herbaceous plants. They include the "grass" of the family Poaceae, which are called grass by ordinary people. This family is also called the Gramineae, and includes some of the sedges (Cyperaceae) and the rushes (Juncacee). [3] These three families are not very closely related, though all of them belong to clades in the order Poles. They are similar adaptations to a similar life-style.
With around 780 genera and around 12,000 species, [1] the Poacee is the fifth-largest plant family, after the Asteraceae, Orchidaceae, Fabaceae and Rubiaceae. [4]
The true grasses include cereals, bamboo and the grasses of lawns (turf) and grassland. Uses for graminoids include food (as grain, sprouted grain, shoots or rhizomes), drink (beer, whisky), pasture for livestock, thatching thatch, paper, fuel, clothing, insulation, construction, sports turf, basket weaving and many others.
Many grasses are short, but some grasses can grow tall, such as bamboo. Plants from the grass family can grow in many places and make grasslands, including areas which are very arid or cold. There are several other plants that look similar to grass and are referred to as such, but are not members of the grass family.
These plants include rushes, reeds, papyrus and water chestnut. Seagrass is a monocot in the order Alismatales.
Grasses are an important food for many animals, such as deer, buffalo, cattle, mice, grasshoppers, caterpillars and many other grazers. Unlike other plants, grasses grow from the bottom, so when animals eat grass they usually do not destroy the part that grows. [5] This is a part of why the plants are successful.
Without grass, soil may wash away into rivers (erosion).
Plants are eukaryotes, predominantly photosynthetic, forming the kingdom Plantae. Many are multicellular.
Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. All current definitions exclude the fungi and some of the algae. By one definition, plants form the clade Viridiplantae (Latin for "green plants") which consists of the green algae and the embryophytes or land plants. The latter include hornworts, liverworts, mosses, lycophytes, ferns, conifers and other gymnosperms, and flowering plants. A definition based on genomes includes the Viridiplantae, along with the red algae and the glaucophytes, in the clade Archaeplastida
Green plants obtain most of their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria. Chloroplasts perform photosynthesis using the pigment chlorophyll, which gives them their green colour. Some plants are parasitic and have lost the ability to produce normal amounts of chlorophyll or to photosynthesize. Plants are characterized by sexual reproduction and alternation of generations, but asexual reproduction is also common.
There are about 380,000 known species of plants, of which the majority, some 260,000, produce seeds.
Green plants provide a substantial proportion of the world's molecular oxygen and are the basis of most of Earth's ecosystems. Grain, fruit, and vegetables are basic human foods and have been domesticated for millennia. Plants have many cultural and other uses, such as ornaments, building materials, writing materials, and, in great variety, they have been the source of medicines. The scientific study of plants is known as botany, a branch of biology.
Botany, also called plant science (s), plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term “botany" comes from the Ancient Greek word Botáun (botane) meaning "pasture" "herbs" "grass", or "fodder"; Born is in turn derived from Bóokeiv (boskein), "to feed" or "to graze". [1][2][3] Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), [4] and approximately 20,000 are bryophytes. [5]
The fruit of Myristica fragrans, a species native to Indonesia, is the source of two valuable spices, the red aril (mace) enclosing the dark brown nutmeg.
Botany originated in prehistory as herbalism with the efforts of early humans to identify - and later cultivate
- plants that were edible, poisonous, and possibly medicinal, making it one of the first endeavours of human investigation. Medieval physic gardens, often attached to monasteries, contained plants possibly having medicinal benefit. They were forerunners of the first botanical gardens attached to universities, founded from the 1540s onwards. One of the earliest was the Padua botanical garden. These gardens facilitated the academic study of plants. Efforts to catalogue and describe their collections were the beginnings of plant taxonomy, and led in 1753 to the binomial system of nomenclature of Carl Linnaeus that remains in use to this day for the naming of all biological species.
In the 19th and 20th centuries, new techniques were developed for the study of plants, including methods of optical microscopy and live cell imaging, electron microscopy, analysis of chromosome number, plant chemistrv and the structure and function of enzvmes and other proteins. In the last two decades of the 20th century, botanists exploited the techniques of molecular genetic analysis, including genomics and proteomics and DNA sequences to classify plants more accurately.
Modern botany is a broad, multidisciplinary subject with contributions and insights from most other areas of science and technology. Research topics include the study of plant structure, growth and differentiation, reproduction, biochemistry and primary metabolism, chemical products, development, diseases, evolutionary relationships, systematics, and plant taxonomy. Dominant themes in 21st century plant science are molecular genetics and epigenetics, which study the mechanisms and control of gene expression during differentiation of plant cells and tissues. Botanical research has diverse applications in providing staple foods, materials such as timber, oil, rubber, fibre and drugs, in modern horticulture, agriculture and forestry, plant propagation, breeding and genetic modification, in the synthesis of chemicals and raw materials for construction and energy production, in environmental management, and the maintenance of biodiversity.
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The answer to this question depends on who you ask. As we'll explore further below, sunflowers are very evocative flowers that mean different things to different people, cultures, and belief systems. Because of this, the name "sunflower" has different associations and meanings to different people, and this often comes with a different explanation as to how these vibrant plants came to be known as sunflowers.
That said, there are two reasons that do crop up time and time again. Firstly, sunflowers are known to gradually move their heads throughout the day so that they're always facing the sun. Secondly, their bright yellow petals resembles the sun.
What do sunflowers symbolise?
As mentioned above, sunflowers can mean lots of different things in different cultures. Let's explore some of the most interesting meanings associated with the flowers:
The Greek myth of Apollo and Clytie:
Given that they're incredibly cheerful looking, you might be a little surprised to learn that the sunflower has some associations with unrequited love, longing, and heartache. This is because of the Ancient Greek myth, Apollo and Clytie. This myth tells the story of Clytie, a beautiful water nymph and the daughter of Oceanus, the Greek god of the sea.
Clytie falls in love with Helios, the Greek god of the sun. He is one of the most powerful of all the gods, responsible for creating night and day by moving the sun across the sky each day in his chariot. The Greeks believed that this is why the sun always moved from side of the day to the other throughout the day.
@mayengahezron2978ปีที่แล้ว +1
Grass know-it all or copy and paste dude from google
@jumpingtoasters3340ปีที่แล้ว +2
Grass is also a type of plant that belongs to the family Poaceae. It is one of the most common and widespread plants on Earth, with over 10,000 known species. Grasses are characterized by their slender, elongated leaves that arise from the base of the plant. They typically have hollow, jointed stems known as culms.
Grass can vary in size, shape, and color depending on the species. It can range from a few centimeters to several meters in height. Some grasses have dense and compact growth habits, while others have more open and spreading forms.
Grass plays a crucial role in ecosystems around the world. It covers vast areas of land, forming meadows, prairies, steppes, and lawns. Grasses have a fibrous root system that helps stabilize the soil, preventing erosion. They also provide habitat for many animals and insects.
Grass is primarily known for its role as a food source. It is a staple in the diets of herbivorous animals such as cows, horses, and sheep. Grasses are rich in carbohydrates, providing energy for these animals. Additionally, grasses are cultivated as crops for human consumption, such as wheat, rice, corn, and barley.
In addition to its ecological and agricultural importance, grass has cultural and recreational significance. Many sports, including soccer, football, and golf, are played on grass fields. Lawns are created for aesthetic purposes and provide outdoor spaces for relaxation and leisure activities.
Overall, grass is a diverse and versatile plant that plays a vital role in the environment, agriculture, and human activities.@BasicallyNormalPerson7 หลายเดือนก่อน
Bruh who asked
@Editing_lil_bro7 หลายเดือนก่อน
Shut up you bot
@mttornado68276 หลายเดือนก่อน
dude is not blox fruiter