Small Flip Clock is small size desk Flip Clock. Small flip card with retro minute and hour display;
Small Flip clock is Retro design , Accurate and Energy-saving quiet quartz movement;
Small Flip clock Materials: Environmental ABS ,Natural bamboo, 304 Stainless steel ,PVC flip.
Suitable for bedroom, living room, study, kitchen, office .
Small Flip Clock,Flip Alarm Clock,Flip Number Clock,Helicopter Flip Clock Guangzhou Huan Yu Clocking Technologies Co., Ltd. , https://www.mk-time.com
The test questions of the simulation test before the 2013 college entrance examination The base pairing occurs in the following physiological processes or biotechnology: () ①Seed germination ② Virus propagation process ③ Bacterial dichotomy process ④ Target gene and carrier combination ⑤ Use of DNA probe ⑥ Processing of secreted protein And transportation ①②③④⑤ B. ①②③④⑤⑥ C. ②④⑤ ②③⑤⑥ 2． A, B, and C in the figure represent three regions with different natural conditions. The thick black lines between regions indicate that there is a certain geographical isolation. Some individuals in area A began to distribute to areas B and C due to opportunities, and two new species gradually formed. A, B, and C in ③ respectively represent 3 populations. The following relevant statement is correct A. The above process shows that geographic isolation is a sign of the formation of new species B. The gene stocks of the two populations A and B are quite different, and gene exchange cannot be carried out. Geographic isolation exists between the two populations of B and C, but the gene frequencies of the two populations are the same. The reproductive isolation of the A and C populations, the composition of the gene pools of the two populations is completely different