In sponges, fertilization takes place in which of the following?
Correct answer: D. Mesenchyme
- A. Ectoderm
- B. Endoderm
- C. Uterus
- D. Mesenchyme
Explanation
Some sponge species reproduce sexually. These are mostly hermaphrodite, mostly protandrous, i.e. male sex cells develop first. In some sponges the sexes are separate. Sperms released in water are carried to the eggs by amoeboid cells. Fertilization occurs in mesenchyme and zygote is formed. The embryo development includes blastula and larval stages.
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