Question
Biology Question on Kingdom Animalia
Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?
A
Euglena
B
Amoeba
C
Paramecium
D
Trypanosoma.
Answer
Paramecium
Explanation
Solution
Paramecium is a heterokaryotic organism i. e., it has two nuclei near the cytostome (oral shaped opening called mouth). The macronucleus, which is a conspicuous larger ellipsoidal vegetative nucleus, divides amitotically and controls the vegetative characters and micronucleus is a small compact reproductive nucleus which divides mitotically and controls the reproduction.