6. 研究人员将调控根尖干细胞微环境的P、W基因过表达系统导入某植物根尖外植体，在无外源激素条件
下诱导外植体形成胚状体，并最终发育为完整植株。下列叙述正确的是
分化、衰老、凋亡与癌变 · 历年高考生物真题与解析
本页汇总 高考真题检索 的「分化、衰老、凋亡与癌变」高考生物真题共 2 道，覆盖 2026 年，最常出题型为 单选题；含完整答案与解析。
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8. 成纤维细胞经适当剂量X射线处理后进入衰老状态，细胞内自由基水平上升，衰老相关β-半乳糖苷酶活
性升高，染色质形成致密团块。下列叙述错误的是
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