Base your answer to the following question on

Biology

1 answer:

tigry1 [53]3 years ago

5 0

Answer:

The correct answer is - the placenta, the site of exchange of materials between the mother and the fetus.

Explanation:

In the given diagram there is a representation of a human embryo developing in the uterus. Different parts are numbered and the number three represents the site of exchange of materials between the mother and the fetus and this organ is called the placenta. It is the organ that develops between fetus and uterus during pregnancy that allows substances such as nutrients, to diffuse from the mother's blood to the fetus and connected by the umbilical cord.

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Consider the phylogeny below. The coelom evolved once in the common ancestor of protostomes and deuterostomes. What does the phy

VikaD [51]

Answer:

Flat worms belong to Phylum- Platyhelminthes as they have flat body because they don't have any coelom in their body or called acoelomate

Explanation:

Coelom is called as the true body cavity that is found in Porifera and Cnidaria but when it comes to platyhelminthes, the coelom is not found and thus they have flat like structure and they are categorized under first triploblastic animals that is they contain 3 tissue layer which are found in higher animals (Ectoderm, Mesoderm and endoderm) also cephalization takes place in this parasitic group which indicates evolution towards higher, complex organisms.