Q. Which is not correct?
A) Ovaries matured first in earthworm
B) Spermatheca present in 6-9 segments
C) Male genital apertures at 18 segment
D) One pair of ovary in 13 segment
Explanation
Earthworm, Pheretima posthuma is a monoecious (hermaphrodite) animal but in them cross-fertilization takes place, male reproductive organs mature prior to female reproductive organ. This situation is known as protandry.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.