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Chloroplasts in leaf cells of the moss Mnium stellare. Plant anatomy or phytotomy is the general term for the study of the internal structure of plants.Originally, it included plant morphology, the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure.
Russian anti-tank obstacles near the horizon, Kherson Oblast, May 2022. Dragon's teeth on the left, Czech hedgehogs on the right In Belgorod Oblast, defensive lines of dragon's teeth were constructed in October 2022 under the supervision of the Wagner Group along the Russia–Ukraine border, intended as a second line of defense alongside trenches and a trained militia in the event the ...
Some Third Front plants moved out of the mountains and caves to nearby small and medium sized cities where the geography and transportation were less difficult. Plants with workshops spread across many places gathered in one place. Third Front plants, especially military plants, were encouraged to produce for the civilian market (junzhuanmin).
A UK defense intelligence report concluded that “Russia has constructed some of the most extensive systems of military defensive works seen anywhere in the world for many decades". The complex, multi-layered system of defensive lines hinged on the village of Robotyne and was breached after months of heavy fighting by Ukrainian forces.
A defense line or fortification line is a geographically recognizable line of troops and armament, fortified and set up to protect a high-value location or defend territory. A defense line may be based on natural difficult terrain features, such as rivers or marshes, mountain ranges, or coastlines; temporary field fortification works such as ...
"I set a task for our team to double our defence capabilities this summer, primarily Patriot and others," Zelenskiy told regional leaders, referring also to U.S. Hawk and German Iris systems. "And ...
Underwater mine fields were a critical component of the defence, and smaller guns were also employed to protect the mine fields from minesweeping vessels. Defences of a given harbor were initially designated artillery districts, redesignated as coast defense commands in 1913 and as harbor defense commands
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