What do the pancreas, liver, salivary glands, and gall bladder have in common? a. they are all involved in mechanical digestion. b. they are all accessory structures. c. they all digest carbohydrates. d. they all release digesting enzymes.

i guess they are all accessory structures

The correct answer would be b. They are all accessory structures.

Salivary glands, pancreas, liver and gall bladder form the accessory glands of the digestive system.

Salivary glands produce salivary amylase in the oral cavity which helps in the digestion of polysaccharides.

Endocrine portion of the pancreas release pancreatic juice which contains a mixture of digestive enzymes such as lipases, proteases, amylase et cetera.

The liver helps in the production of bile which helps in the emulsification of the fats.

The gall bladder is mainly associated with storage and concentration of bile produced by the liver.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.