Question

denticles are tooth - like *
true
false
sharks inhabit all ecosystems, from shallow ones to deep dark ones *
true
false
sharks are considered a keystone species since their presence ensures biodiversity of the ecosystem
true
false
blue sharks used to be very common, but they are hunted and made into chili
true
false

Explanation:

First Question:

Denticles (like shark denticles) are tooth - like structures. So the statement is true.

Sharks are found in a wide range of marine ecosystems, from shallow coastal waters to deep - sea environments. So the statement is true.

Keystone species have a disproportionately large effect on their environment. Sharks help control prey populations, which in turn maintains ecosystem biodiversity. So the statement is true.

Answer:

True

Second Question: