After oxygenation of blood in lungs, it comes back to _____through pulmonary vein:
A) Left ventricle
B) Left atrium
C) Right atrium
D) Right ventricle
The secretion of ________is called bile:
A) Liver
B) Stomach
C) Pancreas
D) Esophagus
The state of inactivity in animals during summer or dry season is called _______
A) Hibernation
B) Pollination
C) Aestivation
D) Conjugation
Which one of the following is not an abiotic component of environment?
A) Soil
B) Water
C) Temperature
D) None of these
The concentration of noble gases in air (atmosphere) is about ________
A) 78%
B) 21%
C) 0.9%
D) 0.03%
The homogenous mixture of two or more substances is called________
A) Suspension
B) Solution
C) Solute
D) Filtrate
