The correct answer is: sea stars
All animals listed above are invertebrates. One of the characteristic of invertebrates are that they are protostomes with the exception of Echinodermata (sea stars). The difference between protostomes and deuterostomes is in their embryonic development (orgin of mouth and anus).
In protostomes the mouth forms first: the oral end of the animal develops from the first developmental opening. On the other hand in deuterostomes the first opening (the blastopore) becomes the anus, and the oral end of the develops from the second opening.
Humans are also deuterostomes.
Answer:
During prophase, which occurs after G2 interphase, the cell prepares to divide by tightly condensing its chromosomes and initiates mitotic spindle formation. The chromatin fibers condenses into discrete chromosomes. The nucleolus also disappears during early prophase.
Hey there,
Question : <span>The bones in the wings of birds and bats are _______ because they derived from a _______ ancestor, while the wings are _______ traits.
Answer : </span><span>homologous; common; homoplastic
Hope this helps :))
<em>~Top♥</em>
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Answer:
The polymerase chain reaction relies upon unusual, heat-resistant __DNA polymerase molecules______ that were isolated from bacteria living in hot springs.
Explanation:
