Compare and contrast two invertebrate phyla using developmental characteristics that are used for classification in the current phylogenetic tree. Be sure to include at least two similarities in the phylum and two differences in the phyla.

The vertebrates such as the Anthropoda & Annelida are similar in their segmented bodies, brains and complete digestive systems while

Mollusks, annelids, and arthropod are protostomes and Echinoderms and chordates are deuterostomes. Anthropoda and echinodermata  have exoskeleton and endoskeleton respectively.          

Explanation:

Two Invertebrate phyla using developmental characteristics

Compare:                                                  

Contrast:

NOTE:

Protostomes and Deuterostomes

Most invertebrates (and higher animals) can be placed in one of two groups based on how they develop as embryos. The two groups are called protostomes and deuterostomes. The organisms in the two groups have different ways of forming the coelom and mouth.

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.