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
Some animals, such as cows, normally make only one offspring from each mating. If a cow showed a dominant phenotype, why would a typical testcross be a complex way to verify the ge

What are the main structures of the human eye? The major structures of the human eye are the cornea, the iris, the pupil, the ciliary muscles, the crystalline lens and the ret

What is Sodium Bicarbonate? The administration of bicarbonate may be considered if the pH remains below 7.1 or if hyperkalemia or tricyclic antidepressant overdose is suspected

The cytoskeleton is a network of very little tubules and filaments spread throughout the cytoplasm of eukaryotic cells. It is made of microtubules, microfilaments and intermediate

Define about the Paracellular Route - Calcium? It involves passive Ca transport through the tight junctions between mucosal cells. The salient features include: It is in


CODEIN E - It is methylmorphine, obtained from opium. It is used in cough syrups. A notable side effect of codeine is constipation.

Explain about the Osteomalacia - Deficiency of Vitamin D? It occurs when there is a lack of vitamin D and calcium, in women who have had many pregnancies, who subsist on a meag

(a) Name four examples of compounds which are classed as carbohydrate. (b) What elements are present in carbohydrates? (a) Sugars (glucose, fructose, maltose, sucro

Q Coming from the acid pH of the stomach which pH level does the chyme find when it enters the duodenum? Why is it necessary to maintain that pH level in the small intestine? What