Question

Which one of the following is bisexual?
(a)Herdmania
(b)Amphioxus
(c)Branchiostoma
(d)Balanoglossus

Answer 1

Hint: organism belongs to subphylum Tunicata or Urochordata and class Ascidiacea. It is also known as sea potato or sea squirt.

Complete step-by-step answer:
Herdmania is a bisexual organism among the following options given. In Herdmania each gonad contains both testis and ovary, it is also known as ovotestis. Asexual reproduction is also observed. The adult form is devoid of tail, notochord, and nerve cord.

Additional Information:
 Bisexual or hermaphrodite organisms should not be confused with intersexual organisms. Their differences are summarized in the table below.

Hermaphrodite	Intersex
-Refers to an organism with both male and female gonads or sex organs as the natural condition.	-Refers to organisms with reproductive organs or external sexual characteristics of both male and female.
-An organism possessing both types of gonads.	-An organism possessing several sex characteristics of both males and females such as chromosomes, gonads, sex hormones, or genitals.
-Can be either plants or animals.	-Found in human beings.
-A natural condition.	-This is a disorder.
-Become both mother and father of the offspring in different conditions.	-Unable to become either mother or father.

Unisexual organisms are the organisms in which any one of the reproductive organs or gonad is present. That is either male or female reproductive structure and never both. But in the case of a bisexual organism, both male and female gonads or reproductive organs are found in the same plant.

So, the correct answer is, ‘ Herdmania.’

Note: -Monoecious is a condition in which the same plant has both male and female organs, that is, the same or single home for both. Whereas in dioecious condition, both male and female organs are found in two different plants.
-A unisexual organism can produce male and female reproductive organs but never both.