Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft. These two fins can be separate or joined.
B. Endocrine system. It is a collection of glands which produce hormones.
The two strands are antiparallel
An ectotherm is an animal that is dependent on external sources of body heat
An endotherm uses heat that its body produces
So the best likely answer would be C.<span> whether or not the animal maintains a constant body temperature</span>
It could be considered living only if it has some of the other characteristics of life...
Such as: obtaining energy, metabolism, excretion of wastes, move or respond to environment (stimuli), reproduction or binary fission, evolution
