The Platypus (Ornithorhynchus anatinus) is a monotreme, a group of mammals that lay eggs instead of giving birth to live young. Dolphins, seals, and whales are placental mammals and are viviparous, meaning they give birth to live offspring.
Parthenogenesis: Development of an embryo directly from an unfertilized egg cell. 2. Apogamy: Development of a sporophyte (embryo) from any gametophytic cell other than the egg (e.g., synergids, antipodal cells) without fertilization. 3. Sporophytic budding (or Adventitious embryony): Development of an embryo directly from diploid sporophytic cells (like nucellus or integument) without the formation of gametes or fertilization. If "sporophytic budding" refers to this, then all three processes result in an embryo without fertilization. 41. Which one of the following animals lays eggs to reproduce?
Asked in UPSC Geoscientist 2023 · Topic: Reproduction and Embryo Development (Types of Reproduction: Asexual and Sexual Modes)
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