Na natureza as relações entre os seres vivos são fundamentais na luta pela sobrevivência e mesmo para o equilíbrio de ecossistemas. As relações podem ser classificadas em quatro grupos (I, II, III e IV) de acordo com o esquema abaixo.

São possíveis relações ecológicas dos tipos I, II, III e IV, respectivamente, EXCETO:

Em um jogo de computador, cada vez que Hillary ganha uma rodada, ela recebe uma quantidade diferente de pontos que vai aumentando à medida que o nível de dificuldade vai crescendo. Certo dia ela começou a jogar e, no nível 1, após ganhar, recebeu 6 pontos. Foi para o nível 2 e, ganhando novamente, recebeu 11 pontos. No terceiro nível, a vitória foi-lhe bonificada com mais 16 pontos. Quando estava no nível 10, depois de vencer, recebeu 51 pontos. O número de pontos obtidos p na vitória do nível n é tal que

(ITA) Considere o polinômio p(x) =  a_n xⁿ com coeficientes a₀ = – 1 e a_n = 1 + ia_n – l, n = 1, 2, ..., 15. Das afirmações:

I. p(– 1) € R,

II.|p(x)| ≤ 4 (3 +), [– 1, 1],

III. a₈ = a₄,

é (são) verdadeira(s) apenas:

I knew TikTok existed, but I didn’t fully understand what it was until a few months ago. I also realized that something radical, yet largely invisible, is happening on the internet – with implications we still don't understand.

When I was growing up, I took it for granted that the people who became famous enough to be listened to by a crowd had worked hard for that accolade and generally operated with the support of an institution or an established industry.

The idea that I, as a teenager in my bedroom, might suddenly communicate with 100,000 people or more, would have seemed bizarre.

Today’s kids no longer see life in these hierarchical and institutional terms. Yes, their physical worlds are often constrained by parental controls, a lack of access to the outdoors and insane over-scheduling.

But despite that (or, more accurately, in reaction to that), they see the internet as a constantly evolving frontier, where it is still possible for a bold and lucky pioneer to grab some land or find a voice. Most voices on the internet never travel beyond a relatively small network, and much of the content that goes viral on platforms such as TikTok, YouTube or Instagram does so because of unseen institutions at work (for example, a public relations team aiming to boost a celebrity’s profile).

Fame can suddenly appear – and then just as suddenly be taken away again, because the audience gets bored, the platform’s algorithms change or the cultural trend that a breakout video has tapped into goes out of fashion.

For a teenager, social media can seem like a summer garden at dusk filled with fireflies: spots of lights suddenly flare up and then die down, moving in an unpredictable, capricious display.

Is this a bad thing? We will not know for several years.

Financial Times, 5 fev. 2020 (adaptado).

Conforme o texto, um aspecto associado ao caráter efêmero da popularidade de um usuário da internet, relativo ao uso de plataformas como TikTok, é a

(UNICAMP) O tecido muscular cardíaco apresenta fibras