Which of the following pairs of organisms exist as colonies?
Answer Details
The pair of organisms that exist as colonies are Pandorina and Volvox.
Pandorina and Volvox are both types of green algae that live in aquatic environments. They are unique in that they are composed of individual cells that form a colony. The individual cells are connected to each other by thin strands of cytoplasm, which allow them to communicate and coordinate their movements.
In the case of Pandorina, a colony is formed by a group of 16 to 32 cells that are arranged in a spherical shape. In contrast, Volvox is a much larger colony that can consist of up to 50,000 individual cells. The cells in a Volvox colony are arranged in a hollow sphere, with some cells specialized for reproduction and others for movement.
Both Pandorina and Volvox have a coordinated movement, with the cells working together to propel the colony through the water. This type of colonial organization allows for greater efficiency in movement and feeding, and also provides a level of protection for the individual cells within the colony.