The filtration units of kidneys are called:

Which of the following statement$(s)$ is (are) correct?
$(i)$ Pyruvate can be converted into ethanol and carbon dioxide by yeast.
$(ii)$ Fermentation takes place in aerobic bacteria.
$(iii)$ Fermentation takes place in mitochondria.
$(iv)$ Fermentation is a form of anaerobic respiration.

$(a)$ Name the protein-digesting enzyme present in pancreatic juice and the hormone secreted by the pancreas.
$(b)$ What is the function of pancreatic juice?

During the respiration of an organism $A$,one molecule of glucose produces two $ATP$ molecules,whereas in the respiration of another organism $B$,one molecule of glucose produces $38$ $ATP$ molecules.
$(a)$ Which organism is undergoing aerobic respiration?
$(b)$ Which organism is undergoing anaerobic respiration?
$(c)$ Which type of organism,$A$ or $B$,can convert glucose into alcohol?
$(d)$ Name one organism which behaves like $A$.
$(e)$ Name two organisms which behave like $B$.

What is the function of platelet cells in blood?

$(a)$ Draw the structure of a nephron and label the following on it: Glomerulus,Bowman's capsule,Renal artery,Collecting duct.
$(b)$ What happens to glucose that enters the nephron along with the filtrate?