胚卵
- 與 胚卵 相關(guān)的網(wǎng)絡(luò)解釋 [注：此內(nèi)容來(lái)源于網(wǎng)絡(luò)国产页，僅供參考]
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ontogenesis
個(gè)體發(fā)育
第二章 昆蟲(chóng)的胚前發(fā)育 一般認(rèn)為,除孤雌生殖的種類(lèi)外昆蟲(chóng)的個(gè)體發(fā)育(ontogenesis)是從合子形成 開(kāi)始的.但近期的研究表明,果蠅卵細(xì)胞在產(chǎn)生過(guò)程中就已經(jīng)參與快速胚胎 發(fā)育.加之胚胎發(fā)育又在卵中進(jìn)行,所以在討論昆蟲(chóng)個(gè)體發(fā)育過(guò)程時(shí),
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STAUROMEDUSAE
十字水母目
營(yíng)固著生活的形似水螅的種類(lèi)構(gòu)成十字水母目(stauromedusae). 種類(lèi)的精卵結(jié)合後形成的胚體,在成體的消化道內(nèi)孵化成浮浪幼蟲(chóng),但有的在海水中發(fā)育. 浮浪幼蟲(chóng)離開(kāi)親體后固著下來(lái),經(jīng)過(guò)一段短短的所謂螅管幼蟲(chóng)階段,長(zhǎng)成為一個(gè)新的缽口幼蟲(chóng).
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tornaria
柱頭幼蟲(chóng)
柱頭蟲(chóng)的卵小,卵黃含量也少,受精卵為均等全裂,胚體先發(fā)育成柱頭幼蟲(chóng)(tornaria),然后經(jīng)變態(tài)為柱頭蟲(chóng). 柱頭幼蟲(chóng)體小而透明,體表布有粗細(xì)不等的纖毛帶,營(yíng)自由游泳生活,它們不論在形態(tài)或生活習(xí)性方面均酷似棘皮動(dòng)物海參的短腕幼蟲(chóng)(bipinnaria)(圖13-6).
- 推薦網(wǎng)絡(luò)解釋
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along with：同...一道(一起)
allow of 容許(有...),容得 | along with 同...一道(一起) | and all that 諸如此類(lèi)
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I was unconditionally and irrevocably in love with him：我毫無(wú)條件地、無(wú)可救藥地愛(ài)上了他
I was absolutely positive about 3 things,有3件事我很確定. | I was unconditionally and irrevocably in love with him.我毫無(wú)條件地国产用力CAO视频、無(wú)可救藥地愛(ài)上了他. | You are my life now.現(xiàn)在你就是我的生命了.
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shop keeper：老板,店主
shipment sample 裝運(yùn)貨物樣本 | shop keeper 老板,店主 | shopping center 市場(chǎng),購(gòu)物中心