Acell is: a) always an organism b) the basic building block of organisms c) the smallest unit of life (lifeform) d) a simple organic unit

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?