wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following is a unicellular organism with multiple functions?

A
Fish
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Bird
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Snake
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Paramoecium
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Paramoecium
Paramecia and other ciliates are the most complex of all single-celled organisms. The paramecium has an external oral groove lined with cilia and leading to a mouth pore and gullet. Food (typically smaller organisms, such as bacteria) is digested in food vacuoles. There are also an anal pore, two contractile vacuoles that regulate the water content of the cell, and two nuclei. The larger nucleus, or macronucleus, is thought to regulate most cell functions, while the smaller nucleus, or micronucleus, is involved in reproduction. Paramecia usually reproduce asexually by cell division but can also exchange genetic information via a process called conjugation, in which two individuals unite at the oral grooves and exchange micronuclei that serve as little packages of DNA, after which the cells divide, yielding daughter cells with DNA from each of the parents. Fish, bird ad snake are multicellular.
Therefore, the correct answer is option D.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Classification of Animals
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon