What is the name of the tissue that passes information between the two cerebral hemispheres?

The Tissue that passes information between the two cerebral hemispheres is called Corpus Callosum. It is also called callosal commissure. It is a wide commissure, a flat bundle of commissural fibers about 10cm long beneath the cerebral cortex in the brains of placental mammals. Thus, the Corpus Callosum is the part of the mind that allows between the two hemispheres of the brain to communicate. It is responsible for transmitting neural messages between both the right and left hemispheres. It is located in the above Thalamus under the cortex and the largest white matter structure in the human brain consisting of 200-250 million axonal projections.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.