Wednesday, November 4, 2009

science concept

Incorrect concept:-

  1. Animal cells do not have vacoule - actually animal cell like amoeba/ paramecium have small vacoule
  2. A log, being very heavy and sinks in water - log heavy but the volume is big too. so log not sink in water... consider the formula of density -------> when mass divide the volume we get the density. density of log is low.....below the density of water. log can float in water.
  3. A population is a group of all the organism present in a habitat - wrong. population is a group of same species in a habitat
  4. parasites usually kill their hosts - parasite not kill their hosts....parasites continue to live on/in the host to get benefits from the living host. predator kill for food

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