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Ghella [55]
3 years ago
14

Give two examples of a deuterostome and two examples of a protostome.

Biology
1 answer:
Norma-Jean [14]3 years ago
7 0

Answer:

Protostomes: mollusks such as bivalves or gastropods.

                      arthropods such as crustaceans or insects.

Deuterostomes: echinoderms such as the starfish

                           hemichordates such as Enteropneusta (marine    

                           vermiculated animals)

Explanation:

The embryonary development of bilateral coelom animals makes a place for the division of two groups: protostomes and deuterostomes. Among protostomes might be mentioned the flatworms, annelids, mollusks, and arthropods. Deuterostomes include echinoderms and chordates, among others.              

These two groups differ in their specific development. Protostomes show spiral initial segmentation, and the mouth develops as a first opening near the blastopore. Deuterostomes show radial segmentation, the anus develops near the blastopore and the mouth develops later in another place.

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An example of this definition is a dermoid cyst in which has the components of a heterogeneous attenuation on CT.

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3 years ago
If a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?
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In a separate study, 68 rock pocket mice were collected from four different, widely separated areas of dark lava rock. One colle
Fudgin [204]

Complete question:

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How does this study support the  concept that natural selection is not random?  

Answer:

The study supports the  concept that natural selection is not random because in different areas with the same or very similar environmental characteristics, the same phenotype was produced by different types of mutations.  

Explanation:

All of the sampled animals are inhabiting dark substrate. Probably animals needed to camouflage to survive. Natural selection must have driven them to produce dark color, similar to the substrate color. So animals from the different regions suffered different mutations that drove them to have almost the same dark fur color. The environmental condition is favoring the same phenotype.

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