(A) The temperature of the water is the most important factor. (B) The speed with which water moves is directly related to the amount of salt. (C) Ocean salinity has little effect on sea life. (D) Various factor
Similarly, a creeping glacier may gradually divide a population, or a land bridge such as the Isthmus of Panama may form and separate the marine life in the ocean waters on either side.How formidable must a geographic barrier be to keep populations apart? It depends on the ability of the ...
1. A topic of increasing relevance to the conservation of marine life is bycatch—fish and other animals that are unintentionally caught in the process of fishing for a targeted population of fish. Bycatch is a common occurrence in longline fishing, which utilizes a long heavy fishing line with...
(A) The temperature of the water is the most important factor. (B) The speed with which water moves is directly related to the amount of salt. (C) Ocean salinity has little effect on sea life. (D) Various factors combine to cause variations in the salt content of water. 46. The wor...
(C) The many forms of ocean life (D) The salinity of ocean water 2. The word "this" in line 5 refers to (A) ocean (B) evaporation (C) salinity (D) crystals 3. According to the passage, the ocean generally has more salt in ...
This heavy water sinks and is found in the deeper portions of the oceans of the world.4l. What does the passage mainly discuss?(A) The elements of salt(B) The bodies of water of the world(C) The many forms of ocean life(D) The salinity of ocean water42. The word "this" in ...
(B) ocean floor (C) crust (D) asthenosphere 12.The author compares the relationship between the lithosphere and the asthenosphere to which of the following? (A) Lava flowing from a volcano (B) A boat floating on the water (C) A fish swimming in a pond (D) The erosion of rocks by ...
D.figuring the volume of water contained in the ocean 答案:C 解析:计算的过程是:“From information provided by gauges placed at the mouths of streams, Joly was able to estimate the annual increment of salt to the oceans. Then, knowing the salinity of ocean water and the approximate volume ...
Hormones can be given artificially, but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion. Scientists have discovered that not only the nervous system but also certain chemicals can affect bodily processes ...
outdoor laboratories of evolution. The Galapagos island chain is one of the world’s greatest showcases of evolution. Each island was born from underwater volcanoes and was gradually covered by organisms derived from strays that rode the ocean currents and winds from other islands and continents....