Whales' ancient ancestors had legs and could walk on land. How does this difference show that whales and animals with four legs are probably descended from a common ancestor?
Because of the homologous structures
. … It shows that by having similar body structures, they probably have a common ancestor.
Is it likely that these two groups of snakes will become separate species?
A new road separates one group of snakes from another. Is it likely that these two groups of snake will become separate species? … It is likely that
if a snake species is separated for a very long time that they will form different traits to help it survive thus making a new species
.
How do fossils support the theory of common descent?
How do fossils support the theory of common descent?
They contain complete DNA genomes
, so they can be compared to modern organisms. … They are a record of some intermediate types of organisms that document the process of evolution. They can be easily and precisely dated by comparing the rock layers where they are found.
Which of the following does not provide evidence for evolution?
Natural variation
simply refers to the differences among cells, organisms, or groups of species. This does not provide evidence about evolution.
What major difference is there between today's whales and the fossils of their ancient ancestors?
What major difference have scientists discovered between today's whales and the fossils of whales ancient ancestors?
Whales' ancient ancestors had legs and walked on land, while modern whales do not
.
What is the strongest evidence of evolution?
Perhaps the most persuasive fossil evidence for evolution is
the consistency of the sequence of fossils from early to recent
. Nowhere on Earth do we find, for example, mammals in Devonian (the age of fishes) strata, or human fossils coexisting with dinosaur remains.
What is the strongest evidence of evolution from a common ancestor?
Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA.
Similar DNA sequences
are the strongest evidence for evolution from a common ancestor.
Is a gene a pool?
A gene pool is
the total genetic diversity found within a population or a species
. A large gene pool has extensive genetic diversity and is better able to withstand the challenges posed by environmental stresses.
How do you explain natural selection?
Natural selection is
the process through which populations of living organisms adapt and change
. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.
What is the formation of new species called?
Speciation
is an evolutionary process by which a new species comes into being. A species is a group of organisms that can reproduce with one another to produce fertile offspring and is reproductively isolated from other organisms.
What are the 5 evidences of evolution?
Five types of evidence for evolution are discussed in this section:
ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos
.
What is the weakest evidence for evolution?
Illogical Geology
The Weakest Point in the Evolution Theory.
What are the 6 evidences of evolution?
- Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures).
- Molecular biology. DNA and the genetic code reflect the shared ancestry of life. …
- Biogeography. …
- Fossils. …
- Direct observation.
What are 3 things that cause evolution?
Evolution is a consequence of the interaction of four factors: (1) the potential for a species to increase in number, (2) the genetic variation of individuals in a species due to mutation and sexual reproduction, (3)
competition for an environment's limited supply of the resources that individuals need in order to
…
Why do biologists care about phylogenies?
Why do biologist care about phylogenies? Phylogenies
enable biologists to compare organisms and make predictions and inferences based on similarities and differences in traits
. … A phylogenetic tree may portray the evolutionary history of all life forms.
Are all animals descended from a common ancestor?
All living beings are in fact descendants of a
unique ancestor
commonly referred to as the last universal common ancestor
