Question
‘Lubb-dupp’ sound is produced due to the action
ofSolution
The heart produces the "lubb-dupp" sound. The "lubb" sound is due to the closing of atrioventricular (AV) valves, and the "dupp" sound is due to the closure of semilunar valves during the cardiac cycle. Information Booster:Â Â Â Â Â Â Â Â Â Â
- The heartbeat is a rhythmic contraction and relaxation of the heart muscles.
- The sounds are diagnostic indicators of heart health.
- A stethoscope amplifies these sounds for clinical analysis.
The oldest crop improvement method is:
Anaerobic respiration is called as
Short day plant is:
Dioecious form of sex is found in which Fruit Crop :
Deforestation has an alarming effect
Which of the following scientists is credited with developing the first cotton hybrid in India, which significantly boosted cotton productivity?
Which among the following can be considered as a biofertilizer?
The optimum spacing (row × plant) of hybrid cotton grown in the irrigated areas
Accumulation of sodium on soil exchange sites is termed:
Iron is absorbed by plants in which of the following forms?
(a)Â Fe2+
(b)Â Fe4+
(c)Â Fe
(d)Â Fe3+
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