sperm whale, (Physeter macrocephalus), the largest of the toothed whales, easily recognized by its enormous square head and narrow lower jaw. The sperm whale is dark blue-gray or brownish, with white patches on the belly. It is thickset and has small paddlelike flippers and a series of ro...
(2004). Human sperm competition: Testis size, sperm production and rates of extrapair copulations. Animal Behaviour, 68 , 297–302. View ArticleSimmons LW, Firman RC, Rhodes G, Peters M. Human sperm competition: testis size, sperm production and rates of extrapair copulations. Anim Behav. ...
”同时,又根据“The sperm whale’s brain is…six times the size of a human brain. (抹香鲸的大脑是人脑的六倍。)”这样如果抹香鲸重30吨,其大脑=30xO.02%=0.15(吨),等于人脑的六倍,所以人脑重量=0.15÷6=0.025(吨),人的身体=人脑重量÷2%=0.025÷2%=0.0125(吨)=125(公斤)。B项正确。
Define parenthesizes. parenthesizes synonyms, parenthesizes pronunciation, parenthesizes translation, English dictionary definition of parenthesizes. or vb 1. to place in parentheses 2. to place in parentheses 3. to insert as a parenthesis 4. to insert a
Analysis of the Human Sperm Proteome As part of our effort to identify putative protein targets for the development of male contraceptives, we performed an in-depth proteomic analysis of human... DS Johnston,J Wooters,GS Kopf,... - 《Annals of the New York Academy of Sciences》 被引量: ...
Sperm whales(Physeter macrocephalus) are the largest toothed whales, distinguishable by their massive and blunt heads. They are also known ascachalot(a French word for "big teeth") because of their large lower teeth. Sperm whales are mammals, breathing air through their lungs, giving birth to ...
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A tiny fruit fly has the bizarre distinction of possessing the longest sperm of any animal—20 times the length of its own body and 1,000 times that of human sperm. Not longer in proportion to its bodysize, just longer. Period.
altering with periods of feeding and growth in silver eels, Anguilla anguilla (L.) Sexual maturation was induced in a batch of 95 male silver eels (Anguilla anguilla (L.)) with human chorionic gonadotrophin (500 IU on days 0 and 7). After spermiation the eels were given food (from day...
Sperm whales prey on adult colossal squids, whereas pilot whales, elephant seals, albatrosses, and toothfishes prey on juveniles. Conservation status Because it lives across such a vast area of ocean and at depths not often visited by human beings, the colossal squid has rarely been observed ...