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Зображення

EN_00966278_4328
rmEN_00966278_4328

Illustration of the structure of typical plant cells: cell wall, pectin, plasma membrane, cytoplasm, vacuole, vacuolar membrane (tonoplast), mitochondrion, nuclear membrane, chromatin, nucleolus, nucleoplasm, Golgi apparatus, endoplasmic reticulum, ribosomes, chloroplast, grana, and pyrenoids.

EN_00966278_4329
rmEN_00966278_4329

Illustration of the structure of typical plant cells with labels: cell wall, pectin, plasma membrane, cytoplasm, vacuole, vacuolar membrane (tonoplast), mitochondrion, nuclear membrane, chromatin, nucleolus, nucleoplasm, Golgi apparatus, endoplasmic reticulum, ribosomes, chloroplast, grana, and pyrenoids.

EN_00966278_6130
rmEN_00966278_6130

Conceptual illustration of a tree with a root system that mimics the bronchial tree structure of the lungs.

EN_00966278_8462
rmEN_00966278_8462

Illustration of nuts and nut kernels of the Persian walnut tree, Juglans regia. Walnut oil is pressed from the kernels of the nut. The tree is shown at right.

EN_00966278_8463
rmEN_00966278_8463

Illustration of the Aleppo pine (Pinus halepensis), a detailed view of the branches with the leaves and cones, with the tree shown above. A variety of rosin obtained from the Aleppo pine is known as "pece greca," or Greek pitch.

EN_00962647_0077
rmEN_00962647_0077

Cherry tree in autumn

EN_00962647_0078
rmEN_00962647_0078

Cherry tree in spring

EN_00962647_0079
rmEN_00962647_0079

Cherry tree in summer

EN_00962647_0611
rmEN_00962647_0611

Cherry tree in winter

EN_00957730_2630
rmEN_00957730_2630

Illustration of Eurasian milfoil (Myriophyllum spicatum), an aquatic plant.

EN_00957730_2632
rmEN_00957730_2632

Illustration of a food web with labels. A food web is a set of interconnected food chains by which energy and materials circulate within an ecosystem.

EN_00957730_2651
rmEN_00957730_2651

Northern milfoil.

EN_00957730_2658
rmEN_00957730_2658

Illustration of purple loosestrife (Lythrum salicaria).

EN_00957730_2678
rmEN_00957730_2678

Illustration of wild calla (Calla palustris), a flowering plant native to cool temperate regions of the Northern Hemisphere, growing in bogs and ponds.

EN_00957730_2679
rmEN_00957730_2679

Labelled illustration of the wild iris (Dietes iridioides).

EN_00957730_2680
rmEN_00957730_2680

Illustration of the wild iris (Dietes iridioides).

EN_90261299_0001
rmEN_90261299_0001

PHOTO: EAST NEWS/SCIENCE PHOTO LIBRARY Great white shark (Carcharodon carcharias) anatomy, computer artwork.

EN_90273128_0001
rmEN_90273128_0001

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.

EN_90273128_0002
rmEN_90273128_0002

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.

EN_90273128_0003
rmEN_90273128_0003

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.

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