sea squirts or tunicates are an example of which of the 3 subphyla of chordata?
urochordata
cephalochordata
vertebrata
none of the above
20 multiple choice 10 points
nematode worms (roundworms) belong to which of the following?
deuterostomata
spiralia
ecdysozoa
none of the above
21 multiple choice 10 points
what nutritional deficiencies have we inherited from our fish vertebrate ancestors?
inability ot make omega-6 fatty acids

Question

Accepted Answer

### Question 1 (Sea squirts/tunicates subphylum of Chordata)
# Brief Explanations:
Sea squirts (tunicates) are known to belong to the subphylum Urochordata (also called Tunicata) within Chordata. Cephalochordata includes lancelets, Vertebrata includes vertebrates, so the correct option is Urochordata.
# Answer:
A. Urochordata (assuming the first option is labeled A, with the text "Urochordata")

### Question 2 (Nematode worms' classification)
# Brief Explanations:
Nematode worms (roundworms) are part of the superphylum Ecdysozoa, which includes organisms that molt. Deuterostomata includes echinoderms and chordates, Spiralia includes mollusks and annelids, so the correct option is Ecdysozoa.
# Answer:
C. Ecdysozoa (assuming the third option is labeled C, with the text "Ecdysozoa")

### Question 3 (Nutritional deficiencies from fish ancestors)
Note: There's a typo ("ot" instead of "to"). Vertebrates (including humans) inherited the inability to synthesize certain fatty acids like omega - 3 and omega - 6 from fish ancestors? Wait, actually, humans (and vertebrates) can't synthesize essential fatty acids like some omega - 3 and omega - 6, but the option here is "Inability to make omega - 6 fatty acids" (after correcting the typo). However, more accurately, vertebrates (including us) can't make certain essential fatty acids, and this trait is inherited from our fish - like ancestors. So if this is the option, it would be the correct one. But since the option has a typo, but the intended answer is likely this option.
# Brief Explanations:
Vertebrates (including humans) inherited the inability to synthesize certain essential fatty acids (like some omega - 6 and omega - 3) from their fish - like vertebrate ancestors. The option "Inability to make omega - 6 fatty acids" (after correcting "ot" to "to") is related to this inherited nutritional deficiency.
# Answer:
The option with the text "Inability to make omega - 6 fatty acids" (after correcting the typo in "ot" to "to")

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QUESTION IMAGE

Question

Explanation:

Question 1 (Sea squirts/tunicates subphylum of Chordata)

Answer:

Question 2 (Nematode worms' classification)