sobota, 21 października 2017
zamknij [x]
do:

Botanika (96)

1
345... z 5

Zdjęcia

! EN_90273128_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Plant evolution, diagram. Thirteen major groupings of plants are shown over four geologic time periods from 542 million years ago to 65 million years ago. There are four independent groupings: the club mosses, the horsetails and the ferns (all three at left), and the ginkgoes (far right). At centre are the cycads, seed ferns and cycadeoids, which are related. The seed ferns led to the evolution of flowering plants (top) which now dominate plant life on Earth. At right are the primitive conifers, which led to the evolution of the pines, redwoods and cypresses, the Auraucaria, and the podocarps.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273128_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Plant evolution, diagram. Thirteen major groupings of plants are shown over four geologic time periods from 542 million years ago to 65 million years ago. There are four independent groupings: the club mosses, the horsetails and the ferns (all three at left), and the ginkgoes (far right). At centre are the cycads, seed ferns and cycadeoids, which are related. The seed ferns led to the evolution of flowering plants (top) which now dominate plant life on Earth. At right are the primitive conifers, which led to the evolution of the pines, redwoods and cypresses, the Auraucaria, and the podocarps.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273128_0003 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Plant evolution, diagram. Thirteen major groupings of plants are shown over four geologic time periods from 542 million years ago to 65 million years ago. There are four independent groupings: the club mosses, the horsetails and the ferns (all three at top), and the ginkgoes (bottom). At centre are the cycads, seed ferns and cycadeoids, which are related. The seed ferns led to the evolution of flowering plants (right) which now dominate plant life on Earth. At lower centre are the primitive conifers, which led to the evolution of the pines, redwoods and cypresses, the Auraucaria, and the podocarps.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273128_0004 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Plant evolution, diagram. Thirteen major groupings of plants are shown over four geologic time periods from 542 million years ago to 65 million years ago. There are four independent groupings: the club mosses, the horsetails and the ferns (all three at top), and the ginkgoes (bottom). At centre are the cycads, seed ferns and cycadeoids, which are related. The seed ferns led to the evolution of flowering plants (right) which now dominate plant life on Earth. At lower centre are the primitive conifers, which led to the evolution of the pines, redwoods and cypresses, the Auraucaria, and the podocarps.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273485_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Pollen and dust, computer artwork. Both pollen and dust are allergens that can cause allergic rhinitis when inhaled. Allergic rhinitis is the inflammation of the lining of the nasal cavity, which causes a runny nose, sneezing and watering eyes.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273485_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Pollen and dust, computer artwork. Both pollen and dust are allergens that can cause allergic rhinitis when inhaled. Allergic rhinitis is the inflammation of the lining of the nasal cavity, which causes a runny nose, sneezing and watering eyes.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90254973_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Deforestation due to the mountain pine beetle, artwork. The mountain pine beetle (Dendroctonus ponderosae) is found in the forests of western North America. It kills pine trees by boring underneath the bark, laying its eggs, and feeding on the phloem tissue. As of 2008, large outbreaks have killed large swathes of forest in British Columbia and Colorado. It is estimated that by 2020, the resulting deforestation will have released millions of tons of carbon dioxide into the atmosphere.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90254973_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Deforestation due to the mountain pine beetle, artwork. The mountain pine beetle (Dendroctonus ponderosae) is found in the forests of western North America. It kills pine trees by boring underneath the bark, laying its eggs, and feeding on the phloem tissue. Two weeks later (scale across bottom), the tree will be severely damaged or dead, and its pines will have turned red. As of 2008, large outbreaks have killed large swathes of forest in British Columbia and Colorado. It is estimated that by 2020, the resulting deforestation will have released millions of tons of carbon dioxide into the atmosphere.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90251381_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Chlorophyll moleucle. Conceptual computer artwork of a chlorophyll molecule superimposed on a section of leaf. Different atoms are represented by coloured spheres enclosed in a cage-like structure (green: carbon and hydrogen, red: oxygen, blue: nitrogen). Chlorophyll is a pigment that is vital to photosynthesis. It absorbs sunlight and uses the energy to produce carbohydrates from carbon dioxide and water. It is stored in high concentrations in chloroplasts within plant cells and gives plants their green colour.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90272685_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Photosynthesis, computer artwork. Photosynthesis is the process by which most plants (as well as algae and some bacteria) convert sunlight into chemical energy. This energy is used to produce carbohydrate, such as starch, which is stored and used for growth. The process occurs in the green parts of the plant (especially the leaves). It requires water (absorbed by the roots, bottom left) and carbon dioxide (absorbed by the leaves). A by-product is oxygen, which is released through the leaves. For a labelled version of this diagram, see image E100/0280.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90272685_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Photosynthesis, computer artwork. Photosynthesis is the process by which most plants (as well as algae and some bacteria) convert sunlight into chemical energy. This energy is used to produce carbohydrate, such as starch, which is stored and used for growth. The process occurs in the green parts of the plant (especially the leaves). It requires water (absorbed by the roots) and carbon dioxide (absorbed by the leaves). A by-product is oxygen, which is released through the leaves. For a labelled version of this diagram, see image E100/0280.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90272685_0003 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Photosynthesis, computer artwork. Photosynthesis is the process by which most plants (as well as algae and some bacteria) convert sunlight into chemical energy. This energy is used to produce carbohydrate, such as starch, which is stored and used for growth. The process occurs in the green parts of the plant (especially the leaves). It requires water (absorbed by the roots) and carbon dioxide (absorbed by the leaves). A by-product is oxygen, which is released through the leaves.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273120_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Plant communities. Computer artwork showing the types of plants found at different altitudes. Seen here are tropical plants (Monstera sp.) at the lowest altitude, temperate trees (maple, Acer sp.) further up and alpine varieties at top, whose natural habitat is above the tree line. For this image without the labels, see image E500/0158.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90246819_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Aspergillus fumigatus fungus in the lung, computer artwork. Aspergillus fumigatus is made up of fungal threads (hyphae, strands) with conidiophores (fruiting bodies, round clusters) at the tip. The conidiophores are made up of conidia (spores) that are dispersed on the wind. Inhalation of spores by people with a weakened respiratory system, such as asthmatics or those with cystic fibrosis, can result in an allergic reaction known as aspergillosis. A. fumigatus usually grows on decomposing organic matter.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90246819_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Aspergillus fumigatus fungus, computer artwork. Aspergillus fumigatus is made up of fungal threads (hyphae, not seen) with conidiophores (fruiting bodies, lower left) at the tip. The conidiophores are made up of conidia (spores) that are dispersed on the wind, as shown here. Inhalation of spores by people with a weakened respiratory system, such as asthmatics or those with cystic fibrosis, can result in an allergic reaction known as aspergillosis. A. fumigatus usually grows on decomposing organic matter.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90246819_0003 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Aspergillus fumigatus fungus, computer artwork. Aspergillus fumigatus is made up of fungal threads (hyphae, stalk-like strands) with conidiophores (fruiting bodies, round clusters) at the tip. The conidiophores are made up of conidia (spores) that are dispersed on the wind. Inhalation of spores by people with a weakened respiratory system, such as asthmatics or those with cystic fibrosis, can result in an allergic reaction known as aspergillosis. A. fumigatus usually grows on decomposing organic matter.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90272686_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Photosynthesis, illustration. Photosynthesis is the process by which most plants (and some other living organisms) convert energy from sunlight into chemical energy. This energy is used to produce carbohydrate, such as starch, which is stored and used for growth. The process occurs in the green parts of the plant (especially the leaves). It requires water (absorbed by the roots) and carbon dioxide (absorbed by the leaves). A by-product is oxygen, which is released by the leaves.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90273547_0002 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Pollen grains. Computer artwork of pollen grains from a flower. The outer wall (exine) of each pollen grain is highly sculpted to aid the dispersal of the pollen grains. A flowering plant produces many pollen grains which need to be dispersed. This dispersal may happen as the spiky exine sticks to a pollinator such as a bee. Each pollen grain contains a male gamete (reproductive cell) that is intended to fertilise the ovule or egg (female gamete) of another plant of that species, forming the seed for a new plant.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90263036_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Hosta (Hosta sp.). Linoleum block print of a hosta plant in flower.
Wysoka rozdzielczosc dostepna na zamowienie
! EN_90276613_0001 SCI
PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Rose. Linoleum block print of a rose flower (Rosa sp.).
Wysoka rozdzielczosc dostepna na zamowienie

góra

1
345... z 5