The respiratory organ found in the cockroach is the?
A. air sac B. trachea C. lung book D. lung E. gill Correct Answer: Option B – trachea
The conditions that ensure successful exchange of gases in multicellular organisms include the following except?
A. concentration gradient across the respiratory surface B. concentration gradient across the respiratory surface B. presence of thin membrane as the respiratory surface C. last transportation of absorbed gases D. presence of large surface area of the respiratory...
Which of the following blood vessels carries oxygenated blood into the heart?
A. Pulmonary vein B. Anterior vena cava C. Pulmonary artery D. Aorta E. Posterior vena cava Correct Answer: Option A – Pulmonary vein
The process whereby microorganisms can convert atmospheric nitrogen into nitrogenous compound is known as?
A. nitrogen cycle B. nitrogen fixation C. denitrification D. putrefaction E. decomposition Correct Answer: Option B – nitrogen fixationProducts
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