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:
idk bud i think its true but it may be false
Explanation:
Autoinducer molecules are signalling molecules that need bacteria. In order for the autoinducer molecules to signal, the bacteria must find a way to initiate the signal and a way to respond to the signal it had created. Autoinducer molecules increase in production as the density of the bacteria cell increases.
Answer: Tertiary consumers
A tertiary consumer in a food chain is an organism which is carnivorous in nature, which means it feeds upon other organism belonging to lower trophic level like secondary and primary consumers. In ocean foodchain the parrotfish feeds on marine plants which are producers and parrotfish is a primary consumer. This parrotfish is eaten up by big fish which is a secondary consumer. This big fish is feed up by shark. Therefore, shark belongs to tertiary consumers.
