<transcript><audio_15> dificuldade para classificá-los em diferentes categorias. E aí nós chamamos isso de o problema das espécies. Não se preocupe com isso agora. Nesse vídeo, eu apenas vou olhar para organismos que se reproduzem sexualmente.</transcript><transcript><audio_16> reprodução de forma sexual. E esses organismos são separados em espécies diferentes por diferentes formas através do que nós chamamos de isolamento reprodutivo. Isso é uma ideia de que existe</transcript><transcript><audio_17> que fazem com que dois organismos diferentes não tenham filhos juntos. Podemos dividir essas forças em duas categorias distintas, barreiras pré-zigóticas e barreiras pós-zigóticas.</transcript><caption><image_18>The image is a simple illustration of a black arrow pointing towards the right side of the image. The arrow is drawn in a simple, cartoon-like style with a pointed tip and a curved body. The background is white and the text is written in red and black. The text reads "Espécios são dividições por Isolamento Reproduitivo" which translates to "Dividends for Isolation Reproductive" in English.</caption><caption><image_19>The image is a blank white background with two orange text boxes on either side. The text boxes are labeled "Pro-zigotítica" and "Pro - Zigotica" in both English and Spanish. The first text box is written in a bold, sans-serif font and is centered on the right side of the image. The second text box has the same text as the first one. Both text boxes have a simple, minimalist design. The image appears to be a template for a website or application.</caption><transcript><audio_20> Não se esqueça que um zigoto é uma única célula que é feita de material gigante.</transcript> we have great difficulty classifying them into different categories and then we call this the species problem Don't worry about it now in this video  I'm just going to look at organisms that reproduce sexually. In other words, we reproduce sexually and these organisms are separated into different species by different ways through what we call reproductive isolation. That 's an idea and there are many forces or barriers that make  with which two different organisms do not have children together We can divide these forces into two distinct categories Gothic Preze Barriers and Gothic Possession Barriers Prezygotic isolation refers to all of the different forces that prevent two organisms from having children together that occur before the formation of a zygote. forget that I'm not sure there's a single cell that is made of
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