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The earliest fliers were similar to dragonflies with two sets of wings, direct flight muscles, and no ability to fold their wings over their abdomens. Most insects today, which evolved from those first fliers, have simplified to either one pair of wings or two pairs functioning as a single pair and using a system of indirect flight muscles. [32]
Wings may have evolved from appendages on the sides of existing limbs, which already had nerves, joints, and muscles used for other purposes. These may initially have been used for sailing on water, or to slow the rate of descent when gliding. Two insect groups, the dragonflies and the mayflies, have flight muscles attached directly to the ...
Forked tongues have evolved multiple times in squamates. It is unclear, based on the morphological and genetic evidence, where the exact points of change are from a notched tongue to a forked tongue, but it is believed that the change has happened two to four times.
The particular cognitive abilities used by insects in finding food has been the focus of much scientific inquiry. [11] The social insects are often study subjects and much has been discovered about the intelligence of insects by investigating the abilities of bee species. [12] [3] Fruit flies are also common study subjects. [13]
On the other hand, albatrosses have measured lift–drag ratios of 20, [29] and thus fall just 1 meter for every 20 in still air. Most maneuverable glider. Many gliding animals have some ability to turn, but which is the most maneuverable is difficult to assess.
The great apes, dolphins, and rhesus monkeys have demonstrated the ability to monitor their own mental states and use an "I don't know" response to avoid answering difficult questions. Unlike the mirror test, which reveals awareness of the condition of one's own body, this uncertainty monitoring is thought to reveal awareness of one's internal ...
Restoration of Mazothairos. They were characterized by beak-like mouthparts, used to pierce plant tissues for feeding. There is a similarity between their fore- and hindwings, and an additional pair of winglets on the prothorax, in front of the first pair of wings.
Drones die off or are ejected from the hive by the worker bees in late autumn, dying from exposure and the inability to protect or feed themselves, and do not reappear in the bee hive until late spring. The worker bees evict them as the drones would deplete the hive's resources too quickly if they were allowed to stay. [3]