PLZZ Which is NOT a characteristic of a vertebrate?

A-have blood

B-have exoskeleton

C-have a nervous system

D-have backbone

E-have protective skin covering

Of the pollutants that form acids in the atmosphere, which is easiest to reduce? a. sulfur dioxide b. nitrogen dioxide c. ozone d. carbon monoxide

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.