Class IX

Chronic Obstructive lung disease occurs due to
  1. Chronic Obstructive lung disease occurs due to
  2. depressant drugs
  3. amphetamines
  4. cocaine
After receptors sense stimulus,
  1. a negative feedback is generated
  2. a self imposed sweating is produced
  3. self-corrective mechanism is launched
  4. all of these
In dicotyledonous stems,
  1. pith lies at margins of stem
  2. xylem lies outside phloem
  3. phloem lies outside xylem
  4. cambium covers pith cells
To hydrolyze Tristearin, enzyme used is
  1. sucrose
  2. lipase
  3. maltase
  4. amylase
Groups of different tissues working together are called as
  1. genre
  2. origin
  3. organ
  4. system
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