SELECT * FROM question_mgmt as q WHERE id=138 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=7 AND chapterId=26 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th biology Reproduction in Organisms define external fertilization mention its disadva

Question:

Define external fertilization. Mention its disadvantages.

Answer:

External fertilization: It means fertilization takes place outside the body. 

In external fertilization, eggs have less chances of fertilization. This can lead to the wastage of a large number of eggs produced during the process.

Further, there is an absence of proper parental care to the offspring, which results in a low rate of survival in the progenies.


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