When the secretions from the gland must go through a duct, it is a(n) gland?

Exocrine

Explanation:

The exocrine glands are the glands that secrete their substances or secretions directly into a duct. The examples of the exocrine glands include the salivary, sweat, ceruminous, sebaceous, mucous and mammary glands. The exocrine glands secrete glands ions, water, mucins, enzymes and other substances. These glands can be found in regions of the respiratory tract, mouth cavity, skin pores, and digestive tracts. The secretion from these glands is under the control of nervous system.

amber has allowed scientists to study dna that has been preserved over millions of years.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do