A transverse section of Pheretima taken through the 10th segment is observed in microscope. Which of the following structures can be observed in the section? |
|
a) |
Stomach, dorsal blood vessel, ventral blood vessel, supraoesophageal vessel, anterior loops, ring vessel and micronephridia |
b) |
Stomach, dorsal blood vessel, ventral blood vessel, lateral hearts, ring vessels and pharyngeal nephridia |
c) |
Intestine, dorsal blood vessel, ventral blood vessel, supraoesophageal vessel and septal nephridia |
d) |
Stomach, dorsal blood vessel, sub-neural blood vessel and lateral hearts |
A transverse section of Pheretima taken through the 10th segment is observed in microscope. Which of the following structures can be observed in the section? |
|
a) |
Stomach, dorsal blood vessel, ventral blood vessel, supraoesophageal vessel, anterior loops, ring vessel and micronephridia |
b) |
Stomach, dorsal blood vessel, ventral blood vessel, lateral hearts, ring vessels and pharyngeal nephridia |
c) |
Intestine, dorsal blood vessel, ventral blood vessel, supraoesophageal vessel and septal nephridia |
d) |
Stomach, dorsal blood vessel, sub-neural blood vessel and lateral hearts |
(a)
A transverse section of Pheretima taken through the 10th segment shows the following structures - stomach, dorsal blood vessel, ventral blood vessel supraoesophageal vessel, anterior loops, ring vessel and micronephridia.
Sycon belongs to a group of animals which are best described as |
|
a) |
Multicellular with a gastrovascular system |
b) |
Multicellular having tissue organization, but no body cavity |
c) |
Unicellular or acellular |
d) |
Multicellular without any tissue organization |
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