Angiosperms can be defined as vascular plants with seeds, fruit, and flowers for reproduction. This sudden, dramatic appearance of large numbers of very diverse flowering plant species in the fossil record was referred to by English naturalist Charles Darwin as an "abominable mystery." In fact, the landmasses of the Jurassic period were blanketed with thick, tasty coats of vegetation, including ferns, conifers, cycads, club mosses, and horsetails. The angiosperms (or, in new terminology, the magnoliophytes) are the flowering plants, which include perhaps as many as 400,000 species. They had a four- winged form, and each wing seems to have contained a pollen sac. ovaries. Flowering plants first appearing during the _____ Period. The seeds in flowering plants are encased in _____. Amborella. First angiosperms appear in low numbers in the Barremian. They provide an entirely new explanation for what Darwin considered to be … More than 130 million years ago, from the Jurassic period to early in the Cretaceous period, the first flowering plants, or angiosperms (phylum Anthophyta), arose. Flowering plants changed conditions during this period to suit themselves. During this time, it stores energy for the next flowering period. The gymnosperms were the dominant flora during the Age of Dinosaurs, the Mesozoic era (65-245million years ago). Then, about 125 million years ago, angiosperms and their flowers sprang forth during the Cretaceous period, as fully formed as Aphrodite. The huge diversification of angiosperms during the Early Cretaceous is one of the greatest mysteries to plant biologists, more correctly called botanists. Throughout an orchid’s dormant time, blooms drop from the stem, and the stem may shrivel and turn gray or brown. Monocots. Here, we show that the decline of conifers is strongly and directly linked to the increasing diversity of flowering plants. Which major group of angiosperms is by far the largest? Flowering plants continued their slow and steady evolution, culminating in the explosion that helped fuel dinosaur diversity during the ensuing Cretaceous period. They are believed to have evolved from a common ancestor that lived approximately 160 million years ago during the late Jurassic period, and they make up the most evolutionarily successful group of plants. Flowering can last from one to three months after which the plant goes into a period of rest or dormancy. The leaves which appear to belong to the known Caytoniales are of a type which was very widespread during the Jurassic period and extended from Triassic to Cretaceous times. Several of these early angiosperms are "paleoherbs." Angiosperms have a unique relationship with animals that other plants do not. Competition for common resources can make some species groups thrive and others decline. Within 30 million years, angiosperms would dominate the Earth. Angiosperms and gymnosperms are two types of seed plants as shown by the suffix sperm which means “seed” in Latin. Their early history is confined to stream-margin habitats at low latitudes (equatorial) and were secondary in importance (abundance and diversity) to ferns, cycadophytes, and conifers. Flowering plants rose to dominance between 125 and 80 Ma, undergoing an explosive radiation that is believed to have impacted long-established plant groups like gymnosperms. What plant's discovery caused botanists to rearranged the classification of plants? 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angiosperms appeared during which period

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