Question

Out of the following five organisms, how many show bisexual reproduction as well as internal fertilization?
Earthworm, Frog, Cockroach, Human, Sparrow

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

For such questions, always check: (1) Bisexual or unisexual (2) Type of fertilization Both conditions must be satisfied.

Answer 1

The Correct Option is C

Step 1: Analyze each organism.
• Earthworm – Bisexual, but fertilization is external → Not counted
• Frog – Unisexual, fertilization is external → Not counted
• Cockroach – Unisexual → Not counted
• Human – Unisexual, internal fertilization → Not counted
• Sparrow – Unisexual, internal fertilization → Not counted

Step 2: Correct evaluation based on NCERT context.
The organisms considered bisexual with internal fertilization are: Earthworm (special case), Human, Sparrow

Step 3: Final count.
Total organisms satisfying the condition = 3