为什么有些植物会吃虫子？
Why do some plants eat insects?
它们缺的不是能量而是矿质养分。酸性泥炭沼里氮和磷极少，根系又弱，叶片便特化成捕虫器：蜜腺与触发毛引虫并困住它，腺体分泌蛋白酶在体外消化虫体，产物以氨基酸、铵盐和磷酸盐被吸收，用于造蛋白质与核酸。捕来的虫等于一笔缓释肥料补贴，能量仍来自光合。边界在代价：捕虫叶光合面积小、建造维护都贵，只有光照足而土壤瘦处才有净收益。
What these plants lack is mineral nutrients, not energy. In acidic peat bogs nitrogen and phosphorus are scarce and roots are too weak to cover the shortfall, so leaves are modified into traps: nectar and trigger hairs lure an insect in and hold it there, glands digest the body outside the plant with enzymes such as proteases, and the products are absorbed as amino acids, ammonium and phosphate to build proteins and nucleic acids. A caught insect is a top-up of slow-release fertilizer, while the energy still comes from photosynthesis. The boundary is cost: trap leaves offer little photosynthetic area and are dear to build and maintain, so the strategy pays only where light is plentiful and soil is poor.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#食虫植物 #养分 #氮
什么是植物的向性运动？
What are tropisms in plants?
植物会朝刺激方向生长，例如向光性（朝光长）和向地性（根朝下、茎朝上），由生长素分布不均引起。
Plants grow toward or away from stimuli—phototropism (toward light) and gravitropism (roots down, shoots up)—driven by uneven auxin distribution.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#向性 #生长素 #刺激
为什么含羞草一碰，叶片就快速合拢下垂？这和动物的神经反射是一回事吗？
Why do mimosa leaves fold and droop the moment they are touched? Is this the same as a nervous reflex?
含羞草的运动叫感震性，机制与动物的神经反射类似，但载体不同。触摸引起叶枕（叶柄基部膨大的运动细胞）产生电信号和化学信号，钾离子和水迅速流出，膨压骤降，细胞失水变软，叶片便合拢下垂；十几秒到几十分钟后水分回充，叶片重新张开。植物没有神经元，依靠细胞膨压和电信号组成的本土“快速反应系统”，却能把信号以每秒数厘米的速度传遍整株。
Mimosa's movement is seismonasty, similar in spirit to a reflex but built differently. Touch triggers electrical and chemical signals in the pulvini, the swollen motor cells at the leaf bases; potassium and water rush out of the cells, turgor pressure collapses, the cells soften and the leaflets fold and droop. Over minutes to tens of minutes water returns and the leaves reopen. Plants have no neurons; they use a home-grown rapid response system based on turgor and electrical signals, yet can conduct the signal at several centimeters per second.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
PNAS（含羞草运动机制）
PNAS (mimosa movement mechanism)
#含羞草 #感震性 #膨压
为什么冬小麦必须在秋天播种？“春化”到底是怎么回事？
Why must winter wheat be sown in autumn? What exactly is vernalization?
冬小麦要经历一段足够长的冬季低温才能在春天正常开花，这种现象叫春化。低温是植物测量季节的“日历”：持续而漫长的冷暴露会抑制 FLC 这类开花抑制基因的表达，并通过表观遗传修饰把这种抑制状态“锁定”，解除对成花基因的封锁。回暖后白昼变长又促进开花；如果冬天太暖，植物会误以为冬天没到，整个春天都不抽穗，收成大减。
Winter wheat needs a long enough spell of winter cold to flower normally the following spring, and this is vernalization. Cold is the plant's seasonal calendar: prolonged chilling silences flowering-suppressor genes such as FLC, and epigenetic marks lock in the silenced state, lifting the block on floral genes. Longer days after warm-up then promote flowering; if winter is too mild, the plant acts as if winter never came and may fail to head all spring, cutting yields sharply.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Nature（春化作用研究）
Nature (vernalization research)
#春化 #FLC基因 #开花
什么是植物的维管束？
What are vascular bundles in plants?
维管束是植物体内的“管道系统”，木质部向上运水，韧皮部向下运糖，让高大植物成为可能。
Vascular bundles are the plant's 'plumbing': xylem moves water up, phloem moves sugar down, enabling tall plants.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#维管束 #木质部 #韧皮部
为什么切开的苹果会变色？
Why does a cut apple turn brown?
苹果里的酚类物质接触空气后，在酶作用下被氧化成褐色物质，这是一种酶促褐变。
Phenols in the apple oxidize into brown compounds when exposed to air via enzymes—an enzymatic browning reaction.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#苹果 #氧化 #褐变
年轮能告诉我们什么？
What can tree rings tell us?
每年形成一圈年轮，圈数代表树龄，宽窄还能反映当年的气候冷暖与旱涝。
A tree adds one ring per year; the count gives its age, and ring width reveals that year's climate conditions.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#年轮 #树龄 #气候
树把水分和养分分别送到哪里？木质部和韧皮部各自管什么？
Where do trees deliver water and nutrients? What do xylem and phloem each do?
木质部和韧皮部构成植物的“双轨运输系统”。木质部由死细胞连成中空管道，靠蒸腾拉力把根吸收的水和无机盐源源不断送往叶片，方向自下而上。韧皮部由活细胞组成，把叶片光合作用制造的糖等有机物运往果实、种子、根等需要的地方，方向通常自上而下但可双向。一句话：木质部上运水，韧皮部到处送粮。
Xylem and phloem form the plant's dual transport system. Xylem is made of dead cells joined into hollow pipes; transpiration pull keeps a constant stream of water and minerals flowing up from the roots to the leaves. Phloem consists of living cells that carry sugars made in photosynthesis to fruits, seeds and roots, usually downward but able to move either way. In one line: xylem ships water up, phloem delivers food everywhere.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Khan Academy（植物运输）
Khan Academy (plant transport)
#木质部 #韧皮部 #运输
为什么大多数花有香味和颜色？
Why do most flowers have scent and color?
鲜艳的颜色和香味吸引昆虫等传粉者，帮助植物把花粉带到另一朵花上完成繁殖。
Bright colors and scents attract pollinators like insects, helping carry pollen to other flowers for reproduction.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#花 #传粉 #昆虫
种子是怎么长成植物的？
How does a seed grow into a plant?
种子吸水后胚苏醒，先长出根固定并吸水，再长出芽见光进行光合作用，逐渐长大。
After taking in water, the embryo awakens, sends out a root, then a shoot that reaches light to photosynthesize and grow.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#种子 #萌发 #胚
真菌“缠上”树根，是在偷营养还是在帮忙？
When fungi wrap around tree roots, are they stealing nutrients or helping?
大多数情况下是互利的共生。菌根真菌的菌丝比根毛细得多，能伸进更小的土壤孔隙，把水分和特别是难移动的磷酸根离子送给植物，换取植物光合作用合成的糖。大约九成以上的维管植物都和菌根真菌结盟，没有这些“地下伙伴”，森林里的很多树都长不大。
In most cases it is a mutually beneficial symbiosis. Mycorrhizal hyphae are far thinner than root hairs, so they reach into tiny soil pores and supply water and, crucially, phosphate ions that diffuse poorly, receiving sugars from photosynthesis in return. Over 90 percent of vascular plants form this alliance; without these underground partners, many forest trees could hardly grow.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Nature（菌根真菌综述）
Nature (mycorrhizal fungi review)
#菌根 #共生 #磷酸根
为什么有些种子在地里埋了好几年还能发芽？
Why can some seeds still germinate after lying in the ground for years?
这是种子的休眠策略。休眠可能来自坚硬不透水的种皮、种皮内的抑制物质（如脱落酸），或种子需要经历低温或光照刺激才能“解禁”。沙漠里的种子还能在漫长旱季中等待，直到一场雨后迅速萌发，抢占湿润窗口。休眠把发芽的风险分摊到不同年份，是提高生存概率的保险机制。
This is seed dormancy. It can come from a hard, water-impermeable coat, from inhibitors inside the seed such as abscisic acid, or from a need for cold or light before germination is unlocked. Desert seeds can wait through long droughts and germinate quickly after one rain to seize the wet window. Dormancy spreads the risk of germination across years, a kind of insurance that boosts survival.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#种子休眠 #脱落酸 #萌发
为什么有些植物会释放臭味？
Why do some plants release a foul smell?
如巨花魔芋用腐肉味吸引喜腐的昆虫传粉；臭味其实是一种吸引特定传粉者的策略。
Plants like the corpse lily emit a rotting smell to attract carrion insects for pollination—a strategy for specific pollinators.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#臭味 #传粉 #策略
植物的根有什么作用？
What do plant roots do?
根把植物固定在土里，并从土壤中吸收水分和矿物质，向上输送到茎叶。
Roots anchor the plant and absorb water and minerals from soil, sending them up to stems and leaves.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#根 #吸收 #固定
有些植物为什么吃虫子？
Why do some plants eat insects?
捕蝇草等食虫植物生长的地方土里没多少营养。它们抓住小虫子，从中得到需要的养分。
Plants like the Venus flytrap live where the soil lacks good food. They catch small insects to get the nutrients they need.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#食虫植物 #捕蝇草 #植物
花朵为什么香香的？
Why do flowers smell nice?
花香能吸引蜜蜂和蝴蝶来拜访。小虫子帮忙传粉，花才能结出种子。
A flower's sweet smell invites bees and butterflies to visit. The insects help carry pollen so the flower can make seeds.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#花朵 #香味 #植物
仙人掌为什么能在沙漠里活？
Why can a cactus live in the desert?
仙人掌的茎能存很多水，叶子变成小刺减少水分流失，所以很耐旱。
A cactus stores water in its thick stem and has spiny leaves that lose little water, so it survives dryness.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#仙人掌 #沙漠 #储水
一颗小种子怎么长成大树？
How does a tiny seed grow into a big plant?
种子喝到水、晒到太阳就会发芽，先长出小根和小芽。根往下扎、芽往上长，慢慢就成了一棵植物。
When a seed gets water and sunlight, it sprouts a small root and a shoot. The root grows down and the shoot grows up, and little by little it becomes a plant.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#种子 #发芽 #植物
大树为什么会长叶子？
Why do trees grow leaves?
叶子像小工厂，能帮树做出自己吃的“食物”。有叶子，树才能长大长高。
Leaves are like little factories that help a tree make its own food. With leaves, the tree can grow tall and strong.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#大树 #叶子 #植物
植物是怎么制造食物的？
How do plants make their own food?
植物用叶子里的叶绿素，借阳光把水和二氧化碳变成糖和氧气，这叫光合作用。
Using chlorophyll in leaves, plants turn water and carbon dioxide into sugar and oxygen with sunlight—this is photosynthesis.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#光合作用 #叶绿素 #糖
植物不吃东西怎么长大？
How do plants make their own food?
植物的叶子用阳光、水和空气做出甜甜的养分。这个过程叫光合作用，是植物“做饭”的办法。
Plant leaves use sunlight, water, and air to make sweet food for themselves. This is called photosynthesis, which is how plants 'cook' their meals.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#光合作用 #叶子 #植物
大树被砍断后，木头上的圈圈是什么？
What are the rings you see when a tree is cut?
那些圈圈叫年轮，每长一年就多一圈。数一数年轮，就知道这棵树活了多少岁。
Those circles are called tree rings, and the tree adds one ring each year. By counting the rings, you can tell how old the tree was.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#年轮 #大树 #植物
花朵是怎么生出小种子的？
How do flowers make new seeds?
蜜蜂把花粉从一朵花带到另一朵花，这叫传粉。传粉之后，花就能结出果实和种子。
Bees carry pollen from one flower to another, which is called pollination. After pollination, the flower can grow fruit and seeds.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#传粉 #蜜蜂 #植物
蘑菇是植物吗？
Is a mushroom a plant?
不是。蘑菇属于真菌，不会光合作用，而是靠分解腐烂的有机物获取营养。
No. Mushrooms are fungi; they don't photosynthesize but get food by breaking down dead matter.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Raven 等,《Biology of Plants》第8版,W. H. Freeman,2013
P. H. Raven et al., Biology of Plants, 8th ed., W. H. Freeman, 2013
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL16626503W：Biology of plants（按标题+
#蘑菇 #真菌 #分解