ESPECIALIDADE DE ANFIBIOS - RESPONDIDA
Autor: romario oliveira | Publicado: 2011-06-07T13:31:00-03:00

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      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Anfibios  
         1. Quais as características dos   anfíbios?Os   anfíbios são animais de duas vidas, uma na água quando girinos, outra na   terra quando adultos. Quando estão na água, respiram por meio de brânquias, e   na terra por meio de pulmões. 2. Dar o nome das duas principais   ordens de anfíbios e saber distinguir entre elas.a) OS   ANUROS (sapos, pererecas e rãs): Cada um tem quatro pernas, não possuem   cauda. b) OS   URUDELOS (salamandras): Tem a pele furta-cor, quatro patas e cauda. 3. Distinguir entre sapos e rãs Sapos -   Pele rugosa e possui glândula de veneno. Possuem pernas curtas e pulam em   pequenas distâncias. Rãs -   Pele lisa e úmida e sem glândula de veneno. Pulam alto e distânte por terem   as pernas mais compridas. 4. Como os anfíbios se protegem?Tem a cor   do ambiente onde vivem. As rãs saltam para o fundo d’água, se escondem também   no lodo. As pererecas vivem escondidas atrás das prateleiras ou atrás do   lavatório nos banheiros. Os sapos se intrometem nas moitas e buracos. 5. Fazer uma lista de anfíbios que   podem ser encontrados em sua região. Identifique cinco deles, e dizer onde os   encontrou, ou colecionar fotografias ou desenhos de cinco anfíbios diferentes   que você seja capaz de identificar e dizer onde podem ser encontrados.Item   prático.6. Descrever o ciclo de vida de   alguns anfíbios.Item   prático. 7. Explicar o valor econômico dos   anfíbios.Os   anfíbios tem grande valor para os agricultores, porque comem insetos nocivos.   Não devem maltrata-los ou tirar-lhes a vida. 8. Onde as rãs passam o inverno ou   a estação seca?Os   anfíbios passam o inverno escondidos, por terem o sangue frio. Hibernam   quando desce a temperatura. No verão ou já na primavera, ao esquentar o   tempo, eles saem dos esconderijos e reúnem-se para a festa das núpcias. Os   sapos dormem de dia e saem a noite para se alimentar. 9. Identificar duas espécies de   rãs pelos sons que emitem, ou imite os sons de duas espécies de rãs.Os sapos   coaxam: du...du...du...du..., a perereca: roque.. roque...roque..., A rã   preta e esverdeada: foi...foi... 10. Como as rãs e os sapos coaxam?   O que faz com que os sons sejam tão fortes?Os sapos   e as rãs, depois da hibernação, formam uma orquestra ou coral na primavera.   Só os machos cantam ou coaxam, as fêmeas escutam porque a festa e para elas.   Quando eles coaxam, a bolsa de ressonância infra; conforme a espécie, as   vezes fica debaixo do queixo e as vezes fica perto da boca. 11. Fazer um dos itens a seguir: a. Observar um anfíbio para   descobrir:1) onde e quando dorme2) quando sai da toca para buscar   alimento3) qual a sua rapidez4) que distância é capaz de   saltar, e tantas coisas interessantes quanto for possível descobrir. Ou,   cuidar dos ovos de rãs num aquário, e observá-los até que se transformem em girinos. Ou, escrever   um trabalho falando sobre os detalhes exigidos na primeira parte deste item.b. Cuidar dos ovos de anfíbios e   observar seu ciclo de crescimento.