imagine that there were no producers in an ecosystem. what might happen to the state of the ecosystem? would it be sustainable?

Blank is a rock with a find dark texture that makes up the oceanic crust

Alexa is preparing for a presentation by creating note cards identifying keywords that describe various features of each type of plate boundary. which words apply to all three of the convergent boundaries?

Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation