Antagonists muscles (e.g. biceps and triceps brachii)
Coal seams are far deep underground to be considered for opencast minings. These coal seams require underground mining. Since it is too deep underground, it can be used for mapping and correlation of sedimentary rocks or as a key bed.
The best answer to fill in the blank is "multilayered membrane."
The reproductive parts of an angiosperm are located in the flowers. A flower of an angiosperm usually consists of four whorls namely calyx, corolla, androecium and gynoecium.