Only male frog produce croacking sound because-
1). Female frog have no layrny
2). Female frog have larynx but no?vocal cord
3). Male frog have three pair of vocal cord
4). Male frog can magnify their voice with the help of sound box
1. In humans, the sound is produced by the ________.
2. Sexual reproduction in Algae that takes place through fusion of two similar size gametes is called?
3. Ananas comosus is the scientific name of ________.
4. Censor mechanism of dispersal of seeds is found in
5. Carica papaya is the scientific name of ___________.
7. Scientist who discovered blood groups was
8. Radioactivity is a phenomenon of the spontaneous emission of