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  1. 是真的,之前有研究指出,經常上網的學生,腦部會萎縮,記憶力衰退,所以英文,數學的成績沒平常不上網的學生高.而且人腦正常人只用2%.記的越多,越能開發大腦,不過大腦過度使用/過度不使用,都會增加將來腦退化的機會,像打麻將,對未有腦退化的人有用,但己患病的人作用不大,同時不是一天打...

    分類:科學及數學 > 生物學 2012年02月07日

  2. ..., the anchoring protein are assist by lipid. if we are lacking in specific lipid, ... fact, if baby are born without fat, eg, immature early birth , it is very likely that they will die of heat lost! ...

    分類:科學及數學 > 生物學 2011年02月25日

  3. ...sense... 1. frogs produce eggs, but cats...don't they give birth an individual kitten (not eggs obvious) 2. don't understand what do u mean of...

    分類:科學及數學 > 生物學 2009年12月18日

  4. ...many bear species, female brown bears often give birth while hibernating. Cubs stay with their... deer live in medium-sized herds led by a dominant male along with several other bucks, with ...

    分類:科學及數學 > 生物學 2009年11月25日

  5. ...common physical characteristics are: Decreased muscle tone at birth Excess skin at the back of the neck Flattened nose Single...

    分類:科學及數學 > 生物學 2009年09月26日

  6. ...growth of breast tissue Prevents lactation until after the birth (with estrogen) Strengthens the mucus plug ...the pregnancy, the levels of progesterone secreted by the placenta drop off. It is this action that ...

    分類:科學及數學 > 生物學 2009年01月14日

  7. ...if a closely related couple (on the family tree) give birth to a baby, the baby tends to be very likely to be ...carrier marry only a random guy, the problem gene can be fixed by the other healthy gene from the partner since most of the gene can...

    分類:科學及數學 > 生物學 2008年08月27日

  8. ... to come out of the mother with the head first during birth ? Ans : to prevent the umbilical cord accidentally tangling... is due to the slough off of the endometrium casued by the degeneration of corpus luteum. Without corpus luteum, no...

    分類:科學及數學 > 生物學 2008年01月18日

  9. ...fur and its mother's saliva. A month after birth , the color pattern of the cub’s fur is fully ...; mothers play with their cubs by rolling and wrestling with them. ...

    分類:科學及數學 > 生物學 2007年11月27日

  10. ...edit] Color changes in growth period Birth : Black in color. Childhood: Grey...that the age of a dead dolphin can be determined by observing the cross section of its teeth...

    分類:科學及數學 > 生物學 2007年11月28日