Which cell structures are present in mature sieve tube cells, but not in mature vessel elements? Select all that apply. smooth endoplasmic reticulum nucleus mitochondria cytoplasm cell wall

Why do german shepherds shed so much

In which of the following relationships is one organism always benefited while the other organism is always harmed

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.