Bài 55. Sự sinh sản của động vật
<h3 style="text-align: justify;" id="ban-can-bietnbsp">Bạn cần biết&nbsp;</h3> <p style="text-align: justify;">- Đa số loài vật chia thành hai giống: đực và cái. Con đực có cơ quan sinh dục đực tạo ra tinh trùng. Con cái có cơ quan sinh dục cái tạo ra trứng.</p> <p style="text-align: justify;">- Hiện tượng tinh trùng kết hợp với trứng tạo thành hợp tử gọi là sự thụ tinh. Hợp tử phân chia nhiều lần và phát triển thành cơ thể mới, mang những đặc tính của bố và mẹ.</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;" data-ad-status="unfilled"><div id="aswift_4_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_4" name="aswift_4" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=2496579566&amp;pi=t.aa~a.1694800419~i.5~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690918893&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fbai-55-su-sinh-san-cua-dong-vat-1552G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690918893715&amp;bpp=2&amp;bdt=936&amp;idt=2&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690918740%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690918740%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280&amp;nras=3&amp;correlator=233034693866&amp;frm=20&amp;pv=1&amp;ga_vid=1580511438.1690918893&amp;ga_sid=1690918893&amp;ga_hid=406705820&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=971&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076578%2C44788442&amp;oid=2&amp;pvsid=3461793485466526&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=5&amp;uci=a!5&amp;btvi=2&amp;fsb=1&amp;xpc=4epZON5CBa&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=11" data-google-container-id="a!5" data-google-query-id="CLOvkOCbvIADFZmnlgodqoMNfw" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">- Những loài động vật khác nhau có cách sinh sản khác nhau: có loài đẻ trứng, có loài đẻ con.</p> <h3 style="text-align: justify;" id="quan-saacutet-vagrave-tra-loinbsp">Quan sát và trả lời&nbsp;</h3> <p style="text-align: justify;">Nói tên những con vật có trong hình. Con nào nở ra từ trứng, con nào vừa được đẻ ra đã thành con?</p> <p style="text-align: center;"><img src="/uploads/tinymce/55a-1665770142.PNG.webp" width="636" height="595" alt="hinh-anh-bai-55-su-sinh-san-cua-dong-vat-1552-0" title="hinh-anh-bai-55-su-sinh-san-cua-dong-vat-1552-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <h3 style="text-align: justify;" id="trograve-choi-hoc-tap-ldquoai-nhanh-ai-duacutengrdquo">Trò chơi học tập: “Ai nhanh, ai đúng?”</h3> <p style="text-align: justify;">- Thi nói tên những con vật đẻ trứng.</p> <p style="text-align: justify;">- Thi nói tên những con vật đẻ con.</p> <p style="text-align: center;"><img src="/uploads/tinymce/55b-1665770186.png.webp" width="806" height="961" alt="hinh-anh-bai-55-su-sinh-san-cua-dong-vat-1552-1" title="hinh-anh-bai-55-su-sinh-san-cua-dong-vat-1552-1" loading="lazy"></p> <h3 style="text-align: justify;" id="thuc-hagravenh">Thực hành</h3> <p style="text-align: justify;">Vẽ hoặc sưu tầm tranh ảnh những con vật mà bạn thích.</p>