Search results
Results from the WOW.Com Content Network
Evolution has produced astonishing variety of appendages in insects, such as these antennae.. The most recent understanding of the evolution of insects is based on studies of the following branches of science: molecular biology, insect morphology, paleontology, insect taxonomy, evolution, embryology, bioinformatics and scientific computing.
"Evolution". Cell Biology Animation. Archived from the original on 2012-10-22 Interactive timeline from Big Bang to present "Plant Evolution". Plant and Animal Evolution. University of Waikato. Archived from the original on 2012-07-28 Sequence of Plant Evolution "The History of Animal Evolution".
The origin of complete metamorphosis in insects has been the subject of a long lasting, and, at times, fierce debate. One of the first theories proposed was one by William Harvey in 1651. Harvey suggested that the nutrients contained within the insect egg are so scarce that there was selection for the embryo to be forced to hatch before the ...
Webspinners continually extend their galleries to reach new food sources, and expand their existing galleries as they grow in size. The insects spin silk by moving their forelegs back and forth over the substrate, and rotating their bodies to create a cylindrical, silk-lined tunnel. Older galleries have multiple laminate layers of silk.
Holometabola (from Ancient Greek holo-"complete" + metabolḗ "change"), also known as Endopterygota (from endo-"inner" + ptéryg-"wing" + Neo-Latin-ota "-having"), is a supra-ordinal clade of insects within the infraclass Neoptera that go through distinctive larval, pupal, and adult stages.
Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, [2] [3] in addition to over 2,000 extinct ones. [4] Many of the species are parasitic. Females typically have a special ovipositor for inserting eggs into hosts or places that are otherwise ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
The evolutionary origin of the insect wing is debated. During the 19th century, the question of insect wing evolution originally rested on two main positions. One position postulated insect wings evolved from pre-existing structures, while the second proposed insect wings were entirely novel formations.