What is exceptional about the early animal faunas from the Ediacaran and Cambrian Periods? Soft-bodied animals are well represented in these faunas. An adaptive radiation occurs when a single lineage produces many ecologically diverse descendant species in a relatively short period of time.
Q. Which of the following is an example of a Homoplasy?
A homoplasy is a character shared by a set of species but not present in their common ancestor. A good example is the evolution of the eye which has originated independently in many different species. When this happens it is sometimes called a convergence.
Table of Contents
- Q. Which of the following is an example of a Homoplasy?
- Q. What is true of Archaea?
- Q. Which is the best definition of adaptive radiation?
- Q. What is an example of an adaptive radiation?
- Q. What is adaptive radiation explain with examples?
- Q. How is the spread of mammals an example of adaptive radiation?
- Q. Is placental mammals example of adaptive radiation?
- Q. What is adaptive radiation simple?
- Q. What is an example of Exaptation?
- Q. Are Exaptations rare?
- Q. What does Preadaptation mean?
- Q. What is an Exaptation trait?
- Q. Are Wings an Exaptation?
- Q. What is required to fully understand Synapomorphies?
- Q. What is the goal of a Cladogram?
- Q. What do the branches of a cladogram represent?
- Q. What information can be obtained from a Cladogram?
Q. What is true of Archaea?
Domains Archaea contains single-celled microorganisms. These are prokaryotes. They do not have a true nucleus or membrane-bound organelles. They lack peptidoglycan in the cell wall. However, they have some novel features absent in other prokaryotes and eukaryotes.
Q. Which is the best definition of adaptive radiation?
Which is the best definition of adaptive radiation? An adaptive radiation occurs when a single lineage produces many ecologically diverse descendant species in a relatively short period of time. A mass extinction occurs when at least 60 percent of species are wiped out within 1 million years.
Q. What is an example of an adaptive radiation?
Adaptive radiation generally occurs when an organism enters a new area and different traits affect its survival. An example of adaptive radiation is the development of mammals after the extinction of dinosaurs. They called radiation because the species if you’re drawing a diagram radiates form an common ancestor.
Q. What is adaptive radiation explain with examples?
Adaptive radiation is the evolutionary process by which many species originate from one species in an area and radiate to different species. Hence, they evolved from the conventional seed-eating finches to vegetarian and insectivorous finches. They later came to be known as Darwin’s finches.
Q. How is the spread of mammals an example of adaptive radiation?
How is the spread of mammals an example of adaptive radiation? After the mass extinction 65 million years ago, dinosaurs went extinct and left many habitats open. Mammals evolved rapidly, in geologic time, into many different species. It favors traits that help a species survive and reproduce.
Q. Is placental mammals example of adaptive radiation?
Australian marsupials and placental mammals are suitable examples of adaptive radiation and convergent evolution.
Q. What is adaptive radiation simple?
Adaptive radiation, evolution of an animal or plant group into a wide variety of types adapted to specialized modes of life. Adaptive radiations are best exemplified in closely related groups that have evolved in a relatively short time. Fourteen species of Galapagos finches that evolved from a common ancestor.
Q. What is an example of Exaptation?
Exaptation is the process of adaptation of a trait for a purpose other than what the trait was evolved for. For instance, an exaptation could be the use of feathers for mating displays or flight in birds which evolved feathers originally to keep warm.
Q. Are Exaptations rare?
I call such features “exaptations” and show that they are neither rare nor arcane, but dominant features of evolution—though previously unappreciated in the context of the overly adaptationist neo-Darwinian theory.
Q. What does Preadaptation mean?
The term preadaptation in evolution refers to a large change in function accomplished with little or no change in structure (Ridley, 2004). That is, preadaptation refers to the possibility of a characteristic to adopt a new biological function without evolutionary modification.
Q. What is an Exaptation trait?
Exaptation is a term used in evolutionary biology to describe a trait that has been co-opted for a use other than the one for which natural selection has built it. They proposed exaptation as a counterpart to the concept of adaptation. For example, the earliest feathers belonged to dinosaurs not capable of flight.
Q. Are Wings an Exaptation?
Because it is unlikely that wings and feathers evolved initially and specifically for flight, the feathered wings we see on today’s flight-capable birds are a clear example of an exaptation.
Q. What is required to fully understand Synapomorphies?
What is one thing needed to fully understand synapomorphies? A fossil record that indicates the traits of the common ancestor of a group that shares a trait. Outgroups can be used to infer the ancestral states of characters when considering synapomorphic traits among species.
Q. What is the goal of a Cladogram?
to place species in the order in which they descended from a common ancestor. Based on shared characteristics. What does a cladogram represent? A cladogram represents evolutionary relationships between organisms.
Q. What do the branches of a cladogram represent?
So each branch on the cladogram represents a group of organisms that share special characteristics inherited from a common ancestor. Cladograms can be used to illustrate evolutionary relationships and patterns of divergence.
Q. What information can be obtained from a Cladogram?
Scientists use cladograms to propose and ask questions about the evolutionary relationships between different species. By giving weigh to derived characters and recognizing ancestral characteristics, scientists can compare different phylogenies of the same groups of organisms.