Kangroo rat, Biology

Kangroo Rat

Kangroo rat Dipodornys merriami, a native of South-West America is a classical example of how small mammals survive in desert. It exhibits all the osmoregulatoryadaptations for desert life. It survives in arid conditions without ingesting any free water by the followi.ng adaptations:

  1. It avoids much of the daytime heat through nocturnal life-style, keeping cool, during daylight hours by remaining in a burrow. This conserves water loss through evaporative cooling.
  2. It conserves respiratory moisture by an efficient nasal countercurrent mechanism.
  3. It secretes highly concentrated urine.
  4. The rectum absorbs water from the faeces resulting in dry faecal pellets.

Kangroo rat is not known to drink water. It gets only a trace of free water from the dry seeds it eats. Primarily it depends upon the metabolic water for its survival.

Posted Date: 1/16/2013 2:50:24 AM | Location : United States







Related Discussions:- Kangroo rat, Assignment Help, Ask Question on Kangroo rat, Get Answer, Expert's Help, Kangroo rat Discussions

Write discussion on Kangroo rat
Your posts are moderated
Related Questions
Q. What is the cell theory? Cell theory asserts that the cell is the element unit of living beings. Before the discovery of the cell, it was not acknowledged that living bei

show me the schamatic diagram of chrysomoeba?

In the axon of a nerve cell, A. the voltage-dependent conductance of the voltage-gated potassium channel has a faster time course than the voltage-dependent conductance of the

How do the plants classify according to their photoperiodism-based flowering? According to their photoperiodism-based the flowering plants classify as long-day plants, those th

Morphogenetic Processes We discussed earlier the process through which a fertilized egg assumes the shape of a ball or a sheet of cells around a cavity, called blastula. Cons

Explain the Inoculating Loops and Needles? These are most commonly used tools for inoculation. The inoculating loop consists of insulating handle at the end of which inoculatin

Q Which is the chordate class considered an evidence of the transition of the vertebrates from the aquatic to the dry land environment? The amphibians are totally aquatic in th

Nitrogen Fixation As we have said before, atmospheric nitrogen cannot be used by plants or animals. It has to be first fixed. The term nitrogen fixation refers to the oxidatio

phylogenetic consideration

BIOGENESI S OF MITOCHONDRIA De Novo formation i.e. new formation. It is not confirmed. New mitochondria are formed by division (Amitosis) of pre-existing mitochondria.