Macro- elements In Plants :
Macro- elements In Plants MACRO-ELEMENTS are substances that are required by plants for normal growth.
Reduced levels of macro-elements can lead to stunted growth and other specific deficiency effects. Nitrogen
Is important in amino acid synthesis and component of protein, nucleic acids and chlorophyll.
A deficiency leads to Chlorosis (yellowing), red leaf bases, long thin roots. Phosphorus
It is important in the formation of ATP and nucleic acids.
A deficiency leads to red leaf bases. Potassium
It is important in membrane transport.
A deficiency leads to premature death. Magnesium
It is important as it is a component of chlorophyll.
A deficiency leads to chlorosis.
Experiments on mineral deficiency :
Experiments on mineral deficiency
Macro- elements in Animals :
Macro- elements in Animals Iron
Part of haemoglobin
Part of cytochrome anaemia Calcium
Shell
Bone
Teeth
blood clotting Rickets Vitamin D promotes absorption of calcium and phosphorus from and is sourced from milk and sunlight and a deficiency can cause rickets. Lead:
inactive enzymes
causes learning difficulties in young children
Effects of drugs on Foetal development :
Effects of drugs on Foetal development Thalidomide
Deformed limbs and heart.
Alcohol
Growth reduced
Facial abnormalities
heart defects
mental retardation
Nicotine
high foetal mortality
abnormal heart and nervous system