Placozoans Feed by

question 45

Multiple Choice

Placozoans feed by

• A)sharing food produced by symbiotic algae in their diffuse tissues.
• B)gliding over their food,secreting enzymes,and absorbing products.
• C)filtering food that moves through them in tiny pores.
• D)taking food in through a ventral tube,digesting it,and expelling wastes back out the tube.
• E)taking food in through a central tube,digesting it,and moving wastes out the anus.Placozoans lack organs,including digestive organs.They secrete digestive enzymes as they glide over their food.Products of digestion are absorbed by the ventral epithelium.

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Definitions:

Dimethylamine

Dimethylamine is a simple amine consisting of two methyl groups attached to a nitrogen atom, used in a wide range of chemical applications, including as a precursor for certain chemicals.

3-pentanone

An organic compound characterized by a five-carbon chain with a ketone functional group at the third carbon atom.

Enamine

Derivatives of alkenes formed from the reaction between a secondary amine and a carbonyl group, often used as intermediates in organic synthesis.

Imine

A functional group or compound featuring a carbon-nitrogen double bond, often formed by the condensation of an aldehyde or ketone with an amine.