<span>The appropriate answer is c. sonar. Oceanographers use sonar to determine the ocean depth. A sonar signal is sent from the ship. Oceanographers record the time taken for the signal to leave the ship and for it to return. Knowing the speed of sound in water, they are able to calculate the depth of the water. This method is also used to generate bathymetric images of the ocean floor. </span>
C. Chromosomes because they are need to have the cell funtion.
Answer:
to avoid a general collapse of the system (eventually caused by the failure of the local organs)
Explanation:
An organ system can be defined as a group of organs that work together as a unit in order to perform a particular function. In an organ system, each organ has specific functions and is composed of different tissues that in turn have specialized tasks. Organ systems include, among others, the cardiovascular system, respiratory system, digestive system, urinary system, skeletal system, endocrine system, nervous system, etc.
Most commonly the cell<span> changes to a more specialized </span>type<span>. </span>Differentiation occurs <span>numerous times during the development of a multi cellular organism as it changes from a simple zygote to a complex system of tissues and </span>cell types<span>.</span>
