Before egg fertilization, the gene produces a protein, found in the cytoplasm of the egg, that controls the pattern of cell division and thus handedness. 卵子受精之前,这种基因会产生一种蛋白质,这种蛋白质存在于卵子的细胞质中,它控制着细胞分裂的模式,从而控制着旋向性。 30. 20kb He forked an...
(b) Cleavage is the rapid mitotic cell division of the zygote upto the completion of blastula stage. Cleavage differs grom the ordinary mitosis in following respects: (a) Interphase are short and do not involve growth (b) Division are very rapid, nuc
I thought so too, but I missed some questions about cell division on the exam. 22. 20kb 我们为不得不这么做而感到难过,但是现在没有其他的选择。 We are very sad to have to do this, but there is no other alternative now. 23. 5kb 但是,你们可以这么做。 But, you could do it. ...
Primary follicles contain oocyte in the prophase of the first meiotic division. True False Explain. Oogenesis begins before birth, stops, then continues monthly after puberty. a. True b. False State True or False: The disintegration of the corpus luteum (about 10 days after ovulati...
Focuses on changes in the telecommunication industry in China. Ministry of Information Industry's formation of China Telecom Group and China Mobile Communications Group; Impact of China's cellular divestment on foreign competitors; Reduction of excessive government interference.SunLinEBSCO_bspTele Com...
a fungus also produces the medicine penicillin. About 100,000 different species of fungi exist. When you see a light-colored splat on a tree or rock in the woods, it is probably a lichen, which is a fungus and an alga living in a symbiotic relationship, benefiting each other. Fungi are...
In single-celled organisms, gaseous exchange takes place through the cell membrane. Is the statement true or false? A prokaryotic cell has a nucleus. a. True. b. False. Which statement about mitochondria is false? a. Mitochondria contain DNA. b. Mitochondria make ATP for the cell. c. Mi...
parenchyma- the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems blade,leaf blade- especially a leaf of grass or the broad portion of...
(We very rarely get gynandromorphs: flies that are part male and part female, produced when an X chromosome gets lost during cell division in an embryo. But these are developmental accidents, not a “third sex”, and gynandromorphs occur in many animal species). It would be strange ...
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