insecticide science definition dictionary biology

Insecticide - Wikipedia

Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively.Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to be a major factor behind the increase in the 20th-century's agricultural productivity. Nearly all insecticides …

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SCIENCE | definition in the Cambridge English Dictionary

science meaning: 1. (knowledge from) the careful study of the structure and behaviour of the physical world…. Learn more.

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Sessile - Definition and Quiz | Biology Dictionary

Apr 28, 2017·Sessile Definition. Biologically speaking, an organism that is sessile (as opposed to motile) lacks the ability of self-locomotion and is predominantly immobile.. In zoology, sessility applies to those animals which are attached to a substrate.Most often these are marine animals, such as mussels, although parasites such as the cochineal insect assume a fixed life cycle upon their plant hosts.

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ecology - Dictionary Definition : Vocabulary.com

ecology: 1 n the environment as it relates to living organisms “it changed the ecology of the island” Type of: environment the totality of surrounding conditions n the branch of biology concerned with the relations between organisms and their environment Synonyms: bionomics , environmental science Types: palaeoecology , paleoecology the branch ...

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What is Camouflage? - Definition, Camouflage Animals, Examples

Camouflage Definition “Camouflage refers to the use of a combination of materials, illumination or colouration that makes an animal blend in with its environment, or makes it harder to spot. Some types of camouflage are also used to disguises animals as something else.”

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Insecticides | Encyclopedia.com

Insecticides Introduction. An insecticide is a substance used by humans to gain some advantage in the struggle with various insects that are considered "pests." In the sense used here, a pest insect is considered undesirable, from the human perspective, because: (a) it is a vector that transmits diseasecausing pathogens to humans (such as those causing malaria or yellow fever), or other ...

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How to Define Atmosphere

Aug 12, 2019·Atmosphere Definition . Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity. A body is more likely to retain an atmosphere over time if gravity is high and the temperature of the atmosphere is low.

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Biological classification - Entomologists' glossary ...

Biological classification is the process by which scientists group living organisms. Organisms are classified based on how similar they are. Historically, similarity was determined by examining the physical characteristics of an organism but modern classification uses a …

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What Is the Definition of Living Things?

Mar 25, 2020·Living things are organisms that display the key characteristics of life. These characteristics include the ability to grow, reproduce, take in and use energy, excrete waste, respond to the environment, and possess an organized structure more complex than that of non-living things.

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INSECTICIDE | meaning in the Cambridge English Dictionary

insecticide definition: 1. a chemical substance made and used for killing insects, especially those that eat plants 2. a…. Learn more.

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SCIENCE | meaning in the Cambridge English Dictionary

science definition: 1. (knowledge from) the careful study of the structure and behaviour of the physical world…. Learn more.

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BIOLOGY | meaning in the Cambridge English Dictionary

biology definition: 1. the scientific study of the natural processes of living things: 2. the scientific study of the…. Learn more.

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Science definition and meaning | Collins English Dictionary

Mar 06, 2021·Science definition: Science is the study of the nature and behaviour of natural things and the knowledge that... | Meaning, pronunciation, translations and examples

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Fossils - Definition, Types and Formation | Biology Dictionary

Oct 27, 2020·Definition. A fossil is the mineralized partial or complete form of an organism, or of an organism’s activity, that has been preserved as a cast, impression or mold.A fossil gives tangible, physical evidence of ancient life and has provided the basis of the theory of evolution in the absence of preserved soft tissues.

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Insecticides - definition of ... - The Free Dictionary

Insecticides synonyms, Insecticides pronunciation, Insecticides translation, English dictionary definition of Insecticides. n. A substance or agent used to kill insects and other arthropods. in·sec′ti·cid′al adj. American Heritage® Dictionary of the English Language, Fifth...

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variation | Definition, Examples, & Facts | Britannica

Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

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Altruism (biology) - Wikipedia

In biology, altruism refers to behaviour by an individual that increases the fitness of another individual while decreasing the fitness of the actor. Altruism in this sense is different from the philosophical concept of altruism, in which an action would only be called "altruistic" if it was done with the conscious intention of helping another.

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Insecticide - ScienceDaily

Jan 02, 2018·An insecticide is a pesticide used against insects in all development forms. They include ovicides and larvicides used against the eggs and larvae of insects. Insecticides are widely used in ...

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Nymph | Definition of Nymph by Merriam-Webster

Nymph definition is - any of the minor divinities of nature in classical mythology represented as beautiful maidens dwelling in the mountains, forests, trees, and waters. How to use nymph in a sentence.

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Insecticide | Definition of Insecticide by Merriam-Webster

Insecticide definition is - an agent that destroys one or more species of insects; broadly : an agent that destroys insects as well as other small pests (such as mites or nematodes). How to use insecticide in a …

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Spiracle | Definition of Spiracle at Dictionary.com

Spiracle definition, a breathing hole; an opening by which a confined space has communication with the outer air; air hole. See more.

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SCIENCE | meaning in the Cambridge English Dictionary

science definition: 1. (knowledge from) the careful study of the structure and behaviour of the physical world…. Learn more.

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Ecology - Wikipedia

Ecology (from Greek: οἶκος, "house" and -λογία, "study of") is a branch of biology concerning the spatial and temporal patterns of the distribution and abundance of organisms, including the causes and consequences. Topics of interest include the biodiversity, distribution, biomass, and populations of organisms, as well as cooperation and competition within and between species.

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Definition, Types and Examples - Biology Dictionary

Apr 28, 2017·Parasitism Definition. Parasitism is a type of symbiotic relationship, or long-term relationship between two species, where one member, the parasite, gains benefits that come at the expense of the host member.The word parasite comes from the Latin form of the Greek word παράσιτος (parasitos), meaning “one who eats at the table of another”.

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Entomology - Wikipedia

Entomology (from Ancient Greek ἔντομον (entomon) 'insect', and -λογία () 'study of') 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.

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SCIENCE | Definition of SCIENCE by Oxford Dictionary on ...

1 The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

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