The life and activities of a cell is controlled by__________?
The life and activities of a cell is controlled by__________?
A. cytoplasm
B. nucleus
C. vacuole
D. mitochondria
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Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?
Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?
A. Hagfish
B. Fresh water fishes
C. Bony fishes
D. None of theseAmylase becomes denatured at an alkaline pH of:__________?
Amylase becomes denatured at an alkaline pH of:__________?A. 6
B. 7
C. 8
D. 9Approximately _____ species of bacteria are known to cause diseases in humans.
Approximately _____ species of bacteria are known to cause diseases in humans.
A. 100
B. 200
C. 300
D. 400In most birds air sacs are ____________ in number?
In most birds air sacs are ____________ in number?
A. 10
B. 3
C. 4
D. 9Nephrostome in earthworm opens in____________?
Nephrostome in earthworm opens in____________?
A. External space
B. Internal Body cavity
C. In gut
D. In BladderUn-separated replica of chromosome is called___________?
Un-separated replica of chromosome is called___________?
A. Chromatin
B. Kinetochore
C. Chromatid
D. Centromere