A red, slippery jelly formed on the inside of a toilet tank is caused by _____.

a. calcium salts
b. manganese-eating bacteria
c. sulfates
d. iron-eating bacteria


d. iron-eating bacteria

Trades & Technology

You might also like to view...

To force out the scion or scion buds after graft union formation has taken place, the rootstock can be ________.

Fill in the blank(s) with the appropriate word(s).

Trades & Technology

A bird's tail feathers are called _____

a. filoplumes b. semiplumes c. rectrices d. remiges

Trades & Technology

Which character of the vehicle identification number (VIN) represents the model year?

A) 4th B) 1st C) 10th D) 6th

Trades & Technology

Technician A says that a magnetic field is created in the alternator rotor. Technician B says that alternator output is increased if the speed of the generator is decreased. Which technician is correct?

A) Technician A B) Technician B C) Both technicians D) Neither technician

Trades & Technology