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  2. Animal sexual behaviour - Wikipedia

    en.wikipedia.org/wiki/Animal_sexual_behaviour

    Greater sage-grouse at a lek, with multiple males displaying for the less conspicuous females. In sociobiology and behavioural ecology, the term "mating system" is used to describe the ways in which animal societies are structured in relation to sexual behaviour.

  3. Triple helix model of innovation - Wikipedia

    en.wikipedia.org/wiki/Triple_helix_model_of...

    The triple helix model of innovation, as theorized by Etzkowitz and Leydesdorff, is based on the interactions between the three following elements and their associated 'initial role': [9] universities engaging in basic research, industries producing commercial goods and governments that are regulating markets. [2]

  4. Helix of sustainability - Wikipedia

    en.wikipedia.org/wiki/Helix_of_sustainability

    The helix of sustainability - the Carbon cycle ideal for manufacture and use The international recycling symbol - not nature identical.. The helix of sustainability is a concept coined to help the manufacturing industry move to more sustainable practices by mapping its models of raw material use and reuse onto those of nature.

  5. Compartmental models in epidemiology - Wikipedia

    en.wikipedia.org/wiki/Compartmental_models_in...

    For the full specification of the model, the arrows should be labeled with the transition rates between compartments. Between S and I, the transition rate is assumed to be (/) / = /, where is the total population, is the average number of contacts per person per time, multiplied by the probability of disease transmission in a contact between a susceptible and an infectious subject, and / is ...

  6. Triple-stranded DNA - Wikipedia

    en.wikipedia.org/wiki/Triple-stranded_DNA

    Triplex DNA structure. The arrows are going from the 5' end to the 3' end. (Triple-stranded DNA (also known as H-DNA or Triplex-DNA) is a DNA structure in which three oligonucleotides wind around each other and form a triple helix.

  7. Spider - Wikipedia

    en.wikipedia.org/wiki/Spider

    Representatives of the three major extant spider groups (counterclockwise): Mesothelae, Araneomorphae and Mygalomorphae. Scientific classification; Domain: Eukaryota: Kingdom:

  8. Chagas disease - Wikipedia

    en.wikipedia.org/wiki/Chagas_disease

    Chagas disease, also known as American trypanosomiasis, is a tropical parasitic disease caused by Trypanosoma cruzi.It is spread mostly by insects in the subfamily Triatominae, known as "kissing bugs".