【单选题】根据成熟种子胚乳的有无,可将种子分成有胚乳种子和无胚乳种子。下列蔬菜中有胚乳种子是()
【单选题】下列说法中,正确的是( ) ①玉米种子的胚由胚芽,胚轴,胚根,子叶,胚乳五个部分组成 ②胚是种子的主要部分,是新植物体的幼体 ③种子中的子叶发育为叶,胚芽发育为芽,胚轴发育为茎,胚根发育为根.
【单选题】Turkish President Recep Tayyip Erdogan on Wednesday said, “ if each of our citizens adopts __________quarantine, further measures would not be required”.
【单选题】Mrs. Tyson believes that breast milk prevents HIV from connecting to ______.
【单选题】做发芽实验时,下列种子中能发芽的是 [ ]
【简答题】Blanks 1 through 4 are based on the following conversation? Complete the form. Write ONE WORD for each answer. Reception Notes Guest Requirement To 1._____ the stay by two or three days. Guest Name...