Dr. Slobodkin, a co-author of a seminal paper informally known as “The World Is Green,” is credited with helping to transform ecology by using quantitative data to test models of nature.

Dr. Moscona provided early insights into how cells in the developing embryo find one another and interact.

In Smithville, N.J., a group devotes itself to looking for the elusive Jersey Devil, said to have haunted this area for centuries.

Dr. Attardi was a molecular biologist whose penetrating studies of mitochondria helped explain how cells grow and deteriorate with age.