某药业有限公司生产的乳酸依沙丫啶（利凡诺尔粉），该药品国家批准为原料药，类别属于消毒防腐药。该药品外包装和说明书中擅自标示适应症，其中“近年应用于中期妊娠引产成功率可达98%左右，又可用 于提取人血白蛋白”属于厂家擅自用语。 该类药品生产企业明知药品标准有规定的适应症或功能主治，却擅自在药品包装标签...
百度试题 结果1 题目At which stage in meiosisⅠoccurs crossing over? A. Leptotene B. Zygotene C. Pachytene D. Diplotene 相关知识点: 试题来源: 解析 C 反馈 收藏
Which of the following could be unicellular? a) Prokaryotes. b) Eukaryotes. c) Either prokaryotes or eukaryotes. d) Neither prokaryotes nor eukaryotes. Cell Division: The cell division is that process in which one parent cel...
Statement (iv): The meiotic division of the secondary oocyte is concluded with the entry of male gamete. - The secondary oocyte is arrested in metaphase II of meiosis until fertilization occurs. - The entry of the sperm triggers the completion of meiosis, resulting in the formation of a matu...
In eukaryotic cells, DNA replication occurs during the S-phase of the cell cycle. During S-phase, RNA transcription and protein translation are largely limited to the production of histone mRNAs and proteins, thereby decreasing the likelihood that DNA polymerase will encounter RNA polymerase. In ...
Which of the following options is correct? The passing of traits from parents to offspring is known as a. genotype. b. phenotype. c. heredity. d. dominance. Traits In genetics a trait is a characteristic that is in...
Which of the following gymnosperms has branched stems? Solution: Answer: DSolution: Pinus and cedrus have branched stem. The main stem shows monopodial branching. Is fern a bryophyte? No, ferns are not bryophytes. They are pteridophytes. They are non-flowering, vascular plants. Unlike bryophy...
Which occurs in life cycle of mushroom? A. karyogamy B. plasmogamy C. disease cycle D. meiosis 查看完整题目与答案 攀岩运动中,渔人结的优点是结构简单,强度大,结实,缺点是大强度受力之后不易解开。() A. 正确 B. 错误 查看完整题目与答案 材料的种类非常多,现代工程材料根据材料组成分类...
However, her most interesting observations concern meiosis in males 674 REVIEWS with an abnormal chromosome constitution. Opportunities for crossing over between X and Y certainly occur normally but there is still doubt as to which arm of the Y is involved. More important, there is suggestive ...
The most rapid rate of mitosis occurs during periods of growth, such as during the zygote, embryo and infant stages in humans and after periods of inactivity in plants. Mitosis Versus Meiosis Two types of cell division are mitosis and meiosis. In meiosis, a cell splits to form new cells ...