A polyestrous animal is
1. Man
2. Cat
3. Rabbit
4. Horse

Which one represents male gamete?
1. Antipodals
2. Synergids
3. Endosperm
4. Pollen grain

Which one of the following generates new genetic combinations leading to variation?
1. Nucellar polyembryony
2. Vegetative reproduction
3. Parthenogenesis
4. Sexual reproduction