The slide of stages in starfish development illustrates stages from unfertilized egg to gastrula—typical of echinoderms and chordates that have very little yolk in the egg. Three embryonic cell layers—ectoderm, endoderm, and mesoderm—are established. All adult tissues are derived from these layers.
Answer:to scare off a predator
Explanation:
it medical because it explains predictive diagnosis for genetic disorders.
Identify the biotic and abiotic factors that make up a real ecosystem. Observe the relationships between organisms and their environment. Understand that each part of the ecosystem performs an important function important for maintaining balance in such ecosystem!
I gotcha,
Commensalism refers to the relationship wherein one organism is benefitted while other remains unaffected.
