Adaptive Radiations, Biology

Assignment Help:

Adaptive Radiations

The organisms all the time tend to establish harmony with their environment. This process, called adaptation, enables the organism to face the vagaries of the ever changing environment. Adaptation in fact sums up the whole result of evolution. You might have noticed that when organisms belonging to dissimilar groups come to occupy similar environment, they develop striking identities in structure and behaviour, giving a false impression of closer relationship. For instance, fishes and whales which belong actually to different classes are found in similar habitat that is they are both aquatic. They look so alike that for a layman both are 'fishes'. This condition where organisms belonging to different groups adapt themselves to the same environment and look and act alike, is called adaptive convergence. On the other hand, there are situations in which organisms belonging to the same or closely related groups may occupy different environments due to which they develop varied adaptations. It gives rise to diverse evolutionary lines. You know previously that house- lizard, snake, tortoise and crocodile belong to the same class, Reptilia But they look thus different from each other that one may be tempted to place them in separate classes. This circumstances in which animals belonging to same or closely related groups occupy different habitats and obtain different functional adaptations, is called adaptive divergence or adaptive radiation.


Related Discussions:- Adaptive Radiations

Retention of water by kidneys, Retention of water by the kidneys is regulat...

Retention of water by the kidneys is regulated by a part of the brain, called the hypothalamus, that controls the secretion of antidiuretic hormone (ADH).An increased secretion of

Define essential parts of photocolorimeter - sample cuvettes, Define Essent...

Define Essential Parts of Photocolorimeter - Sample Cuvettes? For accurate and precise reading, cuvette must be transparent, clean, devoid of any scratches and there should be

What are the destinations of those oxygen atoms, Q. Photosynthesis is the m...

Q. Photosynthesis is the most significant producer of molecular oxygen (O2) on our planet. From which molecule do oxygen atoms liberated by photosynthesis come and from which other

What is pcr, What is PCR? How does PCR works? PCR, polymerase chain rea...

What is PCR? How does PCR works? PCR, polymerase chain reaction, is a process to synthesize many copies of exact regions of a DNA molecule known as target-regions. Its inventor

Subphylum crustacea, Subphylum Crustacea Crustacea are mainly aquatic...

Subphylum Crustacea Crustacea are mainly aquatic arthropods with gills for respiration. Cephalothorax has usually a carapace; appendages biramous but modified for several fun

What is a population, What is a population? The population is a set of ...

What is a population? The population is a set of individuals of the same species found in a given place in a given time.

Female reproductive system - external genitalia, EXTERNAL GENITALIA - ...

EXTERNAL GENITALIA - Vestibule is covered by 2 pairs of lips labia majoris and labia minoris. At the anterior junction of labia minoris a small erectile clitoris presen

Define the term archenteron, Define the term Archenteron ? The name give...

Define the term Archenteron ? The name given to the primitive gut, the first tube that runs through the developing embryo and is open to the external environment. Formed during

Cellular machinery for the replication of nucleic acids, Which of the follo...

Which of the following statements is true? Answer Viruses are distict from cells by the absence of a lipid membrane around them. Viruses are parasites that require the cell's metab

Emf, In a neuron with a resting potential of -65 mV, the distribution of wh...

In a neuron with a resting potential of -65 mV, the distribution of which ion across the neuronal membrane represents the greatest potential electromotive force (EMF)? A. Potassiu

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd