Which of the following are characteristics of protostomes. (Select ALL that apply) Question options: anuspart forms...
Which of the following are characteristics of protostomes. (Select ALL that apply)
Question options:
|
anuspart forms first |
|
|
trochophore larvae |
|
|
determinate, spiral cleavage |
|
|
radial, indeterminate cleavage |
Homework Answers
Characteristic of Protostomes:
Determinate, Spiral clevage.
Trocophore Larvae
Determinate and spiral cleavage is the characteristic of Protostomes. During the embryonic development, zygote of protostomes divides up in a process called cleavage. Due to this cleavage blastomere cell called Morula is formed. The pattern of cleavage of protostomes is different from deuterostomes in a sense that protostomes divide with spiral cleavage. In Spiral type, cleavage takes place on an angle, so that the blastomeres are arranged in a spiral shape.
Trocophore larva is a free swimming larva found in the Lophotrochozoa phyla. Lophotrochozoa belongs to the Protostomes clade.
These two choices are correct.
In protostomes the mouth opening is the first to be formed later followed by the an**. In deuterostomes the an** forms first followed by the mouth.
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Which of the following are characteristics of protostomes.
(Select ALL that apply)
Question options:
anuspart forms...
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no explaination is needed, I will give a thumb, thanks!
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no explaination is needed, I will give a thumb, thanks!
5. Which of the following is descriptive of protostomes? a) spiral and indeterminate cleavage, blastopore becomes mouth b) spiral and determinate cleavage, blastopore becomes mouth c) spiral and determinate cleavage, blastopore becomes anus d) radial and determinate cleavage, blastopore becomes anus Which of the following is a diploblastic phylum of aquatic predators? a) Cnidaria b) Annelida c) Mollusca d) Arthropoda 7. Chordate pharyngeal slits appear to have functioned first as...
The correct sequence in insect complete metamorphosis is: A) egg-…?immature form-?--> adult B) egg--> trochophore larva ? veliger larva 44. ? adult C) eggpuplaradult. D) egg? larva? pupa? adult E) adultlarvegg pupa. Which of the following is a shared derived character of mammals? A) placenta B) amnion C) three middle -ear bones D) endostyle E) notochord. 45. 46. A shark is characterized by A) placoid scales B) bony skeleton C) water vascular system D) amnion E) muscular diaphragm 7. Which...
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Which of the following are Newton's laws of motion? Select all that apply. Question options: A object in equilibrium will remain so unless acted upon by an outside force. The normal force on a body equals mass times gravity (N=m*g) For every action, there is an equal and opposite reaction The sum of external forces on a body equals mass times acceleration (F= m*a)
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Which of the following are characteristics of opioid agonists - antagonists? Select all that apply Produce a weaker pain response than full opioid agonists. Have a greater abuse potential than pure opioid agonists Produce less respiratory depression than full opioid agonists. Act as antagonists on mu receptors and agonists on kappa receptors
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