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英文 高中

想請教A選項染色體套數跟DNA量之間有什麼關係(一直以為是分開看ㄉ)🙇🏻‍♀️🙇🏻‍♀️🧬

52.~54. 題為題組 [無合成分裂〕 自從 1835 年德國植物學家馮莫爾(Hugo von Mohl)在綠藻的研究中發現細胞分裂以來, 細胞的分裂已被廣泛研究。目前已知的生物細胞分裂包含有絲分裂、減數分裂與無絲分裂,在 進入分裂期之前都須經過遺傳物質(DNA)的複製,確保新生成的子細胞具備母細胞的遺傳訊 息。 翔於天際 2 然而在 2022 年 4 月,國際期刊《自然〉刊登了一篇由臺灣中研院研究團隊發表的論文, 提到脊椎動物斑馬魚的表皮細胞,可在未經 DNA 複製的狀態下進行細胞分裂產生新細胞。由 於沒有經過 DNA複製階段,新生成的子細胞皆不具備完整的母細胞 DNA。此一特殊的細胞分 裂被研究團隊稱為「無合成分裂」,其產生的子細胞型態較小、較扁,且僅發生在斑馬魚體表 最表面一層的表皮細胞;再往內一層的表皮細胞可以進行正常的有絲分裂。這個現象讓研究人 員十分納悶。 ( 經過對斑馬魚生活史的了解,研究人員認為在斑馬魚幼魚早期生長階段,體長變化十分快 速,需要更多的表皮細胞覆蓋身體表面以提供保護,進行無合成分裂可快速增加表皮細胞數 量。目前已知,連續進行兩次無合成分裂,可提升表皮細胞數量達6成的體表覆蓋率。相較 於一般有絲分裂,可以在身體資源有限的早期發育階段,更快速、更有效率地增加表皮細胞數 量。請根據本文回答下列問題。 52. 有關本文的敘述,下列哪些正確?(應選2項) 斑馬魚可利用無合成分裂完成無性生殖 \(B)表皮細胞的覆蓋速度提升,有助於體型的增長 (1) 無合成分裂是斑馬魚增加表皮細胞的唯一方法 (D)斑馬魚的表皮細胞也會進行有絲分裂 (每個染色體完整的細胞僅能進行一次無合成分裂

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英文 高中

想請問第24.題,為什麼rather than不用接動名詞replacing,謝謝!

b ✓ D 第21.至25.題為題組 power reality, autonomous vehicles and networked robots. Besides, it will also promise- We are now on the threshold of a new era of 5G networks. 5G will 自动的 procedures, safer transportation and more immersive gaming experiences. Faster speeds, fastes the three changes 5G is all about. 21. connections and faster access to the cloud are Up to 100 times faster than 4G, 5G will provide a speedier connection to the phone. Plus, service and allow more devices to connect to the netw 22. extra bandwidth will ensure a more at the same time. However, 5G's super-high-frequency airwaves can't travel through walls rooftops, and they become weaker over long distances. As a result, numerous miniature cell to inside and outside the buildings for better efficiency. Also, while 5G might pre must be 23. a speed boost in buildings and crowded areas, 4G will still be in use to cover wider areas i 24. replace 4G directly. meantime. In other words, 5G will work with 4G at first In spite of its limits, the 5G network can function as á cloud server and help self-drivir 25. of an eye. It to process all the needed information to make critical decisions in the 22. (A) innocent 23. (A) installed 24. (A) other than smart believed that 5G can help improve telemedicine and robotic surgeries and thus provide better services. Hopefully, 5G technology can bring human civilization a great leap forward. 21. (A) scarcely 几乎不 I Scarrely thin leisurely (B) reliable (B) related (B) in order to (B) clap 25. (A) drip 第26.至30.題為題組 cities, (C) appropriately (C) pessimistic (C) violated (rather than (C) brick new surgic (D) essentially (D) criminal (D) threatened Dwith a view (D) blink Eating as many fruits and vegetables as you can is thought to be for good health. B the fruits or veggies on your shopping list are not in season or will be eaten much later in Frozen veggies would be a good alternative. But with many myths 26. around today d frozen foods, people often perceive frozen veggies as less healthy. In fact, most researc- that frozen vegetables are just as nutritious, if not more nutritious as their fresh counterpa

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