A sperm cell and an egg cell combine to form a cell called a zygote. This zygote undergoes cellular division repeatedly to become an organism composed of many different kinds of cells. These different types of cells, for example immune cells and blood cells, all arise from the original zygote, but all have different structures and functions. This describes the process of:

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

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.