Search results
Results From The WOW.Com Content Network
A female black fungus gnat. A gnat ( / ˈnæt /) is any of many species of tiny flying insects in the dipterid suborder Nematocera, especially those in the families Mycetophilidae, Anisopodidae and Sciaridae. [1] Most often they fly in large numbers, called clouds. "Gnat" is a loose descriptive category rather than a phylogenetic or other ...
Insects do not have lungs; oxygen and other gases, such as carbon dioxide, pass through their exoskeleton via tiny valves called spiracles. Insects also lack closed blood vessels ; instead, they have a long, thin, perforated tube along the top of the body (called the "dorsal aorta") that functions like a heart, and pumps haemolymph toward the ...
Insects live in a world of motion. This leaf-footed bug climbs wind blown grass and flies off. Insects (from Latin insectum) are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen ), three pairs of jointed legs ...
Antenna (biology) Large antennae on a longhorn beetle. Antennae ( sg.: antenna ), sometimes referred to as "feelers", are paired appendages used for sensing in arthropods . Antennae are connected to the first one or two segments of the arthropod head. They vary widely in form but are always made of one or more jointed segments.
Bed bug. Bed bugs are parasitic insects from the genus Cimex, who are micropredators that feed on blood, usually at night. [ 7] Their bites can result in a number of health impacts, including skin rashes, psychological effects, and allergic symptoms. [ 5] Bed bug bites may lead to skin changes ranging from small areas of redness to prominent ...
Entomology (from Ancient Greek ἔντομον (entomon) 'insect' and -λογία () 'study') [1] is the scientific study of insects, a branch of zoology.In the past the term insect was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arachnids, myriapods, and crustaceans.
Insect ecology is the interaction of insects, individually or as a community, with the surrounding environment or ecosystem. [ 1 ] Insects play significant roles in the ecology of the world due to their vast diversity of form, function and lifestyle; their considerable biomass; and their interaction with plant life, other organisms and the ...
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with artificial selection, which is ...