0
What else can I help you with?
Does echinoderms have a close evolutionary relationship with chordates?
Yes they do. Echinoderms, which include starfish, and chordates, which include humans are closely related in an evolutionary sense due to the way their embryos are formed in the early stages of development. Once past that point, the very obvious differences form.
The number and location of bones of many fossil vertebrates are similar to those in living vertebrates Most biologists would probably explain this fact on the basis of a the needs of the organisms?
No, b) a common ancestor.
What does progenitor mean?
a direct ancestor of somebody or something
Do animals have limbs?
No, not every animal has a backbone. Only animals that belong to the phylum Chordata have backbones, while insects and mollusks do not.
Why do humans and chicks develop similarly to reptiles?
Humans, chicks, and reptiles share a common evolutionary ancestor, which is why they show similarities in early development. This shared ancestry has resulted in conservation of certain developmental processes, such as the formation of specific body structures and organs. These similarities reflect the fundamental genetic and molecular mechanisms that underlie development across different species.
Do chordates and echinoderms have a common ancestor?
yes
How does paedogenisis relate to the evolution of vertebral chordates?
Evolution of chordates is based on pedogenetic theory i.e. primitive chordate ancestor evolved from echinoderm by pedogenesis .
The fundamental likeness of body structure in all vertebrates indicates that these organisms probably originate from?
The body structure in all vertebrates indicated that these organisms originated from Precambrian times. This has to due with having a back bone.
Do humans and frogs share a common ancestor?
Not since the birth of vertebrates. Humans are mammals and frogs are amphibians. However, some research has shown that it is possible that some animals from different Orders have mated, so it is possible that we share a more recent ancestor. In response to demands that God made them and that's that, this is established biology. God may have made them, but that doesn't change the facts.
What is most likely similar to a common ancestor of all vertebrates?
jawless fish
What does the presence of homologous structure in different organisms suggest?
The presence of homologous structures, such as the vertebral column in vertebrates, suggests the presence of a common ancestor. Learn more at 23andme.com.
Are reptiles considered paraphyletic in the classification of vertebrates?
Yes, reptiles are considered paraphyletic in the classification of vertebrates because they do not include all descendants of their common ancestor.
How are birds related to mammals?
Mammals and birds are both vertebrates descended from an early reptilian ancestor.
The presences of some similar structures in all vertebrates suggests that these veterbrates are?
descended from a common ancestor
What is suggested by the similarity of early embryos of different species of vertebrates?
evolution from a distant common ancestor
Why do vertebrates share a common ancestor?
Vertebrates is the name of a taxon, a clade in biology. The most important defining characteristic of this group is that they all have vertebrae.Within this group are many subgroups, which have slightly different characteristics, but all share the defining characteristics of the larger group (the vertebrates).The group vertebrates itself is a subgroup of a larger group. Together with a couple of other groups, it is part of the group Chordata. The most important defining characteristic of this group is that the animals in it all have a central nerve chord along the length of their bodies. Vertebrates and all its sister-groups share this trait, and all the other traits of the larger group, but differ in others (eg. not all chordates have vertebrates).It is this pattern of nested hierarchies, sets within sets within sets, each set sharing the defining characteristics of the superset, but differing in others, that made naturalists conclude that the diversity of life is the product of a process of continuous divergence: evolution. In this model, a superset (ancestral form) produces lineages (subsets) with diverging characteristics. Each of the diverging lineages keeps many of the characteristics of the ancestor, but becomes increasingly different from the ancestral form and its sibling lineages in other aspects. It is this pattern that tells us that all vertebrates have a common ancestor that was part of the clade of Chordata.
Does echinoderms have a close evolutionary relationship with chordates?
Yes they do. Echinoderms, which include starfish, and chordates, which include humans are closely related in an evolutionary sense due to the way their embryos are formed in the early stages of development. Once past that point, the very obvious differences form.
