Single circulation,i.e.,blood flows through the heart only once during one cycle of passage through the body,is exhibited by:

Differentiate between an autotroph and a heterotroph.

Choose the correct statement that describes arteries.

Match the terms in Column $(A)$ with those in Column $(B)$:

Column $(A)$	Column $(B)$
$(a)$ Trypsin	$(i)$ Pancreas
$(b)$ Amylase	$(ii)$ Liver
$(c)$ Bile	$(iii)$ Gastric glands
$(d)$ Pepsin	$(iv)$ Saliva

The filtration units of kidneys are called:

Assume that you are a veterinary surgeon and you have removed a significant length of the small intestine of a bear suffering from an intestinal tumour. After its recovery,would you suggest a plant-based or a meat-based diet for the bear? Provide a reason for your answer.