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A number of phylogenic novelties like endothermy with separated pulmonary and systemic circulatory systems (4 chamber hearts), and expanded cardiac output to handle the blood volume and support the high metabolic rates. Dental differentiation with 4 types of rooted teeth had combined with improved digestion to produce the metabolic base for an endothermic phylum able to rapidly expand once the opportunity was available. Until the niches opened with the last great extinction event the basic mammals would never have been able to compete against animals already highly adapted to their niches. The KT extinction allowed mammals to undergo the adaptive specializations needed to diversify into the range of modern species
What else can I help you with?
What to animal groups for which there is a good fossil record showing their evolutionary development?
Some animal groups with a good fossil record showing their evolutionary development include dinosaurs, mammals, and marine invertebrates like trilobites. Fossil evidence of these groups has allowed scientists to trace their evolutionary history and understand how they diversified and adapted over time.
How do mammalian forelimbs show adaptive radiation?
At the demise of the non-bird dinosaurs the extant mammals were all pretty much the same, all shrew like and having four paws with five figits. as the mammal radiated into the niches that were abandoned by the dinosaurs the basic tetrapod plan remained, but the digits especially changed, Look to the variance between the paws of a tiger, retractable claws that are razor sharp, pads on the bottom for running and the five digits, Then there is the horse, hardened hoof which is the middle digit extended and the nail grown and hardened. You can now think of many differences to forelimbs in mammals engendered by their adaptive radiation. ( whales come to mind )
What is the relationship between speciation and adaptive radiation?
Adaptive radiation is a rapid form of speciation that takes place when there is a mass immigration to new ecological niches, or a mass extinction of one dominant life form opening up niches for other life forms. Darwin's finches are examples of the former, as they reached the Galapagos Islands as one species and radiated from there into many different species of birds make there living in various ways that called for morphological changes, basically in beak size and shape. The death of the dinosaurs is an example of the latter radiation event. That is when several types of small mammals radiated out into all the niches left open bu the dinosaurs.
How do the similarities found in different species of mammals reflect evolutionary relationships?
I and II only
Explain the evidence of evolution presented by the mammals of Australia?
The evolutionary evidence presented by mammals in Australia includes unique marsupial mammals like kangaroos, koalas, and wallabies, which are endemic to the continent. The presence of prehistoric marsupial fossils in Australia supports the idea of an ancient lineage of mammals distinct from placental mammals found elsewhere. The diversity and adaptations of Australian mammals, such as the egg-laying monotremes like the platypus and echidna, further highlight the evolutionary history of mammals in Australia.
Which event is the most likely to cause for the four periods when punctuated equilibrium seems to have occurred?
Extinction events, such as the Permian extinction and the KT extinction event. You have adaptive radiation driving evolutionary change after such events. Google " the rise of the mammals. "
Are placental mammals in north America and marsupials in Australia examples of adaptive radiation?
No.
Which event is the most likely cause for the four periods when punctuated equilibrium seems to occur?
Extinction events, such as the Permian extinction and the KT extinction event. You have adaptive radiation driving evolutionary change after such events. Google " the rise of the mammals. "
What was explosive adaptive radiation of mammals most likely a result of what?
For plato users D)Both A and B
Why was the comet impact a chance happening that benefited the evolution of humans?
Because that comet, which sent many dinosaurs into extinction, caused the mammals to go through a large adaptive radiation event that allowed the vast variation in mammals we see today, especially the variations called apes.
The explosive adaptive radiation of mammals was most likely a result of what?
Adaptive radiation is usually caused by the appearance of a very useful adaptation or the appearance of a new niche in an ecological community. Both contributed to mammals' adaptive radiation. They evolved molars with four cusps, which increased their potential diet. They were insulated by fur, allowing them to survive colder areas and colder times. And the non-avian dinosaurs became extinct, allowing mammals to take their place as the (on average) largest and most dominant organisms in many ecosystems. ---------------------- PLATO USERS D) Both A and B
Can you describe condition that makes it possible for a species to undergo adaptive radiation?
When the dinosaurs went extinct the mammals that were living alongside the dinosaurs underwent massive adaptive radiation. Large extinction events can give rise to niche openings for species that go through the extinction event.
The end-cretaceous extinctions were followed by the . a. adaptive radiation of mammals and birds b. appearance of hard-shelled marine organisms c. appearance of first land plants d. insects?
The answer is a.
Which organisms are not examples of an adaptive radiation?
Organisms that show little to no diversification in response to new environments or niches would not be considered examples of adaptive radiation. This could include species that have remained relatively unchanged over long periods of time or those that have a limited distribution and do not exhibit a wide range of ecological adaptations.
What were the evolutionary beginnings of the mammals?
God created them.
What are some interesting questions about mammals that you would like to explore further?
Some interesting questions about mammals to explore further could include: How do different mammal species communicate with each other? What are the evolutionary adaptations that have allowed mammals to thrive in various environments? How do mammals navigate and find their way in their surroundings?
What kind of vertebrate was likely evolutionary to mammals?
You need to specify a time period for the question to be answered. Synapsids, therapsids, and cynodonts could all be called the early ancestors of mammals, but each at a different stage in the evolutionary history of mammals.
