There are two main mechanisms for change which will reduce biodiversity within a population:
Genetic drift
: The change in the composition of a gene pool as a result of a random or chance event. Natural selection: The change in the composition of a gene pool as a result of differentially selective environmental …
What causes rapid diversification?
More frequent adaptive evolution during rapid diversification may be caused by
adaptation to a diverse range of new ecological niches
[1]. … Here, we focus on the analyses within evolutionary radiations to understand why the frequency of adaptive evolution varies among the rapidly diversifying lineages.
What caused the diversification?
This is because
as species adapted more and more to their environment their ecological niches became more restricted
. This meant that individual populations evolved into new species that were adapted to their environments.
How do clades diversify?
On its mainland home, the insect’s population size and range of resources is constrained by other species competing for the same resources. … All of these factors can drive diversification — but only if
the population has the genetic variation
to take advantage of the opportunities presented by the environment.
What are the four patterns of diversification between species?
Groups of species undergo various kinds of natural selection and, over time, may engage in several patterns of evolution:
convergent evolution, divergent evolution, parallel evolution, and coevolution
.
What is meant by diversification?
Diversification is
a risk management strategy that mixes a wide variety of investments within a portfolio
. … The rationale behind this technique is that a portfolio constructed of different kinds of assets will, on average, yield higher long-term returns and lower the risk of any individual holding or security.
What is diversification in evolution?
Evolution
describes the cumulative changes that occur in the heritable characteristics of a population
. It can result in diversification within a species (microevolution) or diversification between species (macroevolution)
What is diversification in investment?
Diversification is
an investing strategy used to manage risk
. Rather than concentrate money in a single company, industry, sector or asset class, investors diversify their investments across a range of different companies, industries and asset classes.
Is genetic drift evolution?
Genetic drift is
a mechanism of evolution
. It refers to random fluctuations in the frequencies of alleles from generation to generation due to chance events. Genetic drift can cause traits to be dominant or disappear from a population.
Why do scientists apply the concept of maximum parsimony?
Why do scientists apply the concept of maximum parsimony? …
Maximum parsimony hypothesizes that events occurred in the simplest
, most obvious way, and the pathway of evolution probably includes the fewest major events that coincide with the evidence at hand.
Which clade is most diverse?
One explanation for heterogeneity among clade richness is that
older clades
are more species rich because they have had more time to accrue diversity than younger clades.
What causes incomplete lineage sorting?
Incomplete lineage sorting commonly happens with
sexual reproduction
because the species cannot be traced back to a single person or breeding pair. When organism tribe populations are large (i.e. thousands) each gene has some diversity and the gene tree consists of other pre-existing lineages.
How does macroevolution occur?
Macroevolution is an evolution that occurs at or above the level of the species. It is
the result of microevolution taking place over many generations
. Macroevolution may involve evolutionary changes in two interacting species, as in coevolution, or it may involve the emergence of one or more brand new species.
What are the 4 types of evidence for evolution?
Evidence for evolution:
anatomy, molecular biology, biogeography, fossils, & direct observation
.
What are the three evidences of evolution?
There are five lines of evidence that support evolution:
the fossil record, biogeography, comparative anatomy, comparative embryology, and molecular biology
.
What are the 3 types of evolution?
Evolution over time can follow several different patterns. Factors such as environment and predation pressures can have different effects on the ways in which species exposed to them evolve. shows the three main types of evolution:
divergent, convergent, and parallel evolution
.
