Which one of the following human organs is often called the “graveyard” of RBCs?
Gall bladder
kidney
Spleen
Spleen
C.
Spleen
The average life span of human RBCs is 120 days. The aged RBCs attract autoantibodies after which they are attached by macrophages in liver and spleen. Spleen is also called as graveyard of RBCs. The process of destruction of RBCs is called haemolysis. About 2.5 million RBCs destroyed every second in body.
Minerals known to be required in large amounts for plant growth include
phosphorus, potassium, sulphur, calcium
calcium, magnesium, manganese, copper
potassium, phosphorus, selenium, boron
potassium, phosphorus, selenium, boron
A major characteristic of the monocot root is the presence of
Open vascular bundles
Scattered vascular bundles
Vasculature without cambium
Vasculature without cambium
Vascular bundles in monocotyledons are considered closed because
a bundle sheath surrounds each bundle
cambium is absent
there are no vessels with perforations
there are no vessels with perforations
Which one of the following is not an inclusion body found in prokaryotes?
Phosphate granule
Cyanophycean granule
Glycogen granule
Glycogen granule
Transpiration and root pressure cause water to rise in plant by?
pulling it upward
pulling and pushing it, respectively
pulling it upward
pulling it upward