Choose the odd one out in terms of structure formation in the various organisms during the suspended phase.
Bacteria and fungus spores with thick walls
Higher plants - seeds and vegetative propagules
Diapause in Zooplanktons
Ectothermic organisms- Torpid condition during good seasons
Ectotherms are cold-blooded animals that can alter their body temperature in response to environmental stimuli such as sunshine or a heated rock surface.
Fishes, amphibians, reptiles, and invertebrates are all ectotherms.
"Ectothermic organisms - Torpid condition during good seasons," stands out as different from the others. Ectothermic organisms, which depend on external heat sources for regulating their body temperature, typically become torpid or inactive during unfavorable conditions, such as cold winters. However, the statement in option 4 suggests the torpid condition occurs during good seasons, which contradicts the expected behavior of ectothermic organisms. Therefore, option 4 is the odd one out in terms of structure formation during the suspended phase in various organisms.
Hence, the correct answer is option d.