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LEAVES    ARE  THE  MAIN   SITES  OF PHOTOSYNTHESIS   and  transpiration   (water  loss &nbs p; by   evaporation ) in  plants A typical   leaf   consist  of     a   thin , flat  lamina (blade)  supported  by  a  network   of   veins  , a  petiole(leaf stalk); and  a  leaf  base ,where  the  petiole   join   the  stem  . Leaves  can  be  classified     as  simple , in  which    the  lamina  is  a  single   unit  ,  or   compound  , in leaflets.Compound   leaves   may  be  pinnate  , with   pinnae  (leaflets)  on  both  sides  of  a  rachis  (main  axis ),or   palmate,  with  leaflets   arising   from   a  single  point   at   the  tip  of  the  petioleLeaves  can   be classified  further  by  the  overall    shape  of  the  lamina ,  and  by    the  shape  of  the lamina's  apex ,margin  and  base. PHOTOSYNTHESIS PHOTOSYNTHESIS   IS  THE  PROCESS  by  which  a  plant  make  their  food   using  sunlight,water, and  carbon dioxide .It  takes   place   inside  

FORCES  ARE  PUSHES  OR  PULLS that  change  the   motion of  objects .To  make   a  stationary  object  move ,or  a moving  object  stop,  a  force  is  needed .A  force is  also  required  to  change the  speed   and  direction  of  an  object . This   change   in  speed  or  direction is  known  as   acceleration  .Acceleration   depends   on   the  size  (magnitude ) of  the  force ,  and  on  the  mass of  the  object . The  effect  of  forces  were  first  summarized    by  Isaac  Newton  in his  three  laws of  motion. The  International   unit   of  force  , named  after  him, is  the  Newton(N) which  is   approximately   equal   to  the   weight  of   an  apple.Gravity - the  force  of  attraction   between  any  two  masses- can  be  measured  using  a  Newton  meter  (spring  balance).Forces  are  put to useful  effect  in machines .A  simple  machine , such as   a  wheel  and axle ,  is   a device   that  changes  the   size  or  direction   of  an    a

ROOTS  ARE  THE  UNDERGROUND    PART  OF   PLANTS.They  have   three   main  functions .Firs t,they  anchor  the  plant  in  the  soil.Second , they  absorb   water   and   minerals   from  the  space  between   soil  particles ;the  roots'   absorptive   properties  are  increased  by   root  hair ,which  grows   behind  the  root  tips , allowing  maximum  uptake  of  vital   substances .Third , the  root  is  the  part  of  the plant's   transport   system :xylem  carries   water  and  minerals   from  the   root    to  the  stem  and  leaves,and  phloem   carries  nutrients   from  the  leaves  to  all parts  of  the root  system.In  addition , some  roots (e.g carrots)are  food   stores.Roots  have  an  outer  epidermis   covering  a  cortex  of parenchyma(packing tissue )  and  a central  cylinder  of  vascular  tissue .This  arrangement   helps  the  roots   resist  the force  of  compression  as   they  grow  through  the  soil.

THE   STEM  IS  THE  MAIN  SUPPORTIVE   PART  OF   A  PLANT.  that  grow  above  the  ground .Stem  bear   leaves  (organs  of  photosynthesis ),  which  grow   at  nodes,buds (shots  covered  by  protective   scales), which grow  at  the  stem  tip.9apical  or  terminal   buds) and  in  the  angle   between   a  leaf  and  a  stem (axillary  and  lateral  buds);and  flowers  (reproductive  structures).The  stem   forms   part  of  plant's   transport  system :xylem  tissue   in  the  stem  transports  water   and  minerals  from  the roots to the  aerial   part  of  the  plant ,  and  phloem  tissue transport   nutrients   manufactured     in  the  leaves  to  other part  of  the  plant . Stem tissues   are  also  used  to  store   water  and  food . Herbaceous  (non  woody ) stems  have  an  outer  protective  epidermis  covering a cortex    that  consist   mainly  of parenchyma (packing tissue) but  also   has  some  collenchyma (strengthening tissue).Woody  st

Lemon juice is vital for many of its uses at home, plus it has real healing power. After use of the fruit or the juice, keep the peels, as they have some uses. (Freezing them is a great option!) Lemons provide a natural remedy to some ailments and they are also helpful for in cleaning, beauty care, and cooking — plus they smell great. The juice left in the rind of the fruit can be helpful in lightening age spots and for cooking in the kitchen. Lemons have antibacterial properties that make it very useful for clean cutting boards and other surfaces. Some  other  uses  of  lemon  peels  are  - Reduces Cholesterol in the Body Lemon peels are also effective at reducing the cholesterol levels in the body, ensuring that the heart has a better chance of maintaining a healthy state. This is also due to the high levels of flavonoids present in the peels. Less cholesterol in the body means better well being. Remove Odors From Hands If you've ever

THE   brain  is  made  up  of  two  halves.Different    areas   of  the brain  have  different   functions.All   nerve  cells in  the  brain ,  about  100.billion  of  them   are  connected  to  one  another  and  transmit  information.This  network  of  nerve  cells  is  expanded  through  learning  and  training.  Our  brain  controls  our  actions ,   regulates  our  sleep and  allows  us to  feel  sensations  like  pain  and  joy.If  it is  damaged ,due  to  stroke  or some  other reason ,one has  to  relearn  a  lot  of  things  like speaking, walking,or eating. NERVE  CELLS  TRANSMIT  SIGNALS .This   process  is  quite   complicated.Like  other  cells ,nerve  cells  also  have   a  cell  body  with  a  nucleus .These  are  fine   extended   branches   known  as  dendrites  and  a  long  tail   called  axon   on  the  body   of   the  nerve  cells.Axon    in  the  brain   are  smaller   than  1mm,  whereas   in  the  spinal  cord they  can  be  as  long   as  1

HAIR CUTS  DON'T  HURT.The   reason  is  quite  simple, because    hairs   are  made   of  dead  cells,so  we  don't  feel  pain.The  dead  hair  cells  are  filled  with   a  tough  ,    waterproof  protein  called  Keratin,  as are  nails,   and  the  skin  flakes  that  we   lose  daily  in  their  millions  from our  skin  surface.All  these  things    are  part  of  the   protective   overcoat  that  cover  and  protect   our  body. SKIN -  Skin  is   really   thin  but  quite   complex .Its  made  of  two  layers ; The  epidermis     provide  protection, and  is  constantly worn  away and   replaced.The  dermis  glues  the   epidermis  to  the  rest  of  the  body   and  deals   with  feelings, temperature  control,  and  food  and  oxygen  supplies WHY   SKIN IS  IMPORTANT .-  Skin   provide  a   waterproof   covering   around  our   body. It   form  a  barrier  between   our  delicate  tissues   and  harsh  outside    world It   sto

  Advertising Collectibles WHEN   WE   SLEEP   OUR   HEAD  FLOP. When   we  are   awake   the  muscles  in  our  neck  and  back   hold   us   and   our  head  upright.When  we   nod  off, those    muscles  relax   and  our  head  falls   to   one  side .Muscles  do   more  than  just  support  us -by  pulling   our   bones   they  produced  every    movement  from  lifting  a pen   to   running   a  race. MUSCLES   ARE   OF  THREE  TYPES. SKELETAL   MUSCLES -  It     pulls   on  bones so  we  can   move  our  body. SMOOTH  MUSCLES -   These  are  found  in  the  walls   of  hollow   organs  ,  such  as    bladder. CARDIAC   MUSCLES - These   are  found  in    the  walls  of   the  heart,  it   constantly   contracts    to  pump  blood. Muscles    are  made  up   of  long  cylindrical  cells  called   fibers .Nerve    fibers    carry   signals  from  the  brain   that  make  the  muscles  fibers  contract.  Blood   vessels   carry  oxygen  

The white shark, commonly called the great white shark, is one of the most iconic and feared creatures of the ocean. With its razor-sharp teeth and menacing appearance, it certainly looks dangerous. But the more we learn about this creature, the more we learn they are not indiscriminate predators, and definitely don't prefer humans as prey. Great white sharks are relatively large, although likely not as large as they might be in our imagination.   T he largest shark specie s is a plankton eater, the whale shark. Great whites average about 10-15 feet in length, and their maximum size is estimated at a length of 20 feet and weight of 4,200 pounds. Females are generally larger than males. They have a stout body, black eye, a steel gray back and a white underside.  Great white sharks are widely distributed across the world's oceans. This shark resides mostly in temperate waters in the pelagic zone. They can range to depths over 775 feet. They may patrol coastal are

 To   maintain   the  glow  and  shine  of  your  skin  you  need  to   get  into  a  daily  routine  and  pick up  good habits  for  the  skin  you  live  in. Drink  water-&nbs p; The   most  important   skincare  habit   is  to  drink  the   enough  water  that  is  8 glasses  of  water  a   day.It  really  has  amazing  effects ,your  skin  becomes  clearer , brighter  and  more  hydrate,  and  it  is   an  inexpensive  way  to  stop  food  carvings. Wear  Suncream - Sun  cream   is  not  only  for  summer   days.You  should  use  sun cream  everyday  to  protect  against   the  sun  damage  which  you  can't see,preventing  fine lines, wrinkles,  and   sun spots later on .It  also  smells  good. Exfoliate- Don't  forget  to  exfoliate   to  remove  dead  skin cells  from  your  body   and  face, at  least once  a  week.Use  a gentle  exfoliating  scrub    to  remove  the  top  layer  and  be  left  with  baby soft  skin.It  also  prevent 

While   surfing  the Web,  these commands  could  help  you  and  are absolutely worth learning. By making repetitive motions faster, web surfing becomes so easy  and    pleasant! The following shortcuts can  be   work with desktop versions of Chrome, Firefox, and IE. CTRL-T to launch a new browser tab page. Tabbed pages are very useful: they let you open multiple web pages simultaneously without the same memory load as a full browser window.  Simply press CTRL-T to launch a new tab. Related: use CTRL-Page Up and CTRL-Page Down to navigate between the tabs.  CTRL-Enter to type 'www.' and '.com' Once you have pressed ALT-D to focus on the browser address bar,

College  life  is  full   of   stress  and  tension .There  are   many kind  of  stresses   relating  to study,   career , how  to achieve    good performance   at  study,relationship  with  fellow  students, even  with  teachers  and  how  to  optimize  overall  performance.True  , all  these  matters  are  important  but remember   good   physical   and  mental   health   is  utmost   important  because  only  then  you could   concentrate   on  your  studies   and  other  matters.So  it  is  essential   to  maintain  a  healthy  and  stress  free  mind  and  body.  Some  ways  to  be  stress-free  are -   Relaxing Ways to Destress Breathe deeply.  It only takes a few minutes, but it can do wonders for your mental health. Focus on inhaling and exhaling while trying to let all the stress in your brain slowly melt awa y.   Put your headphones in and listen to some music.  Closing your eyes and relaxing while listening to some music can do wonders for you