12. Teleostei comprehend a. Anguilliformes, inflexible fishes that are aquatical
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Question
12. Teleostei comprehend a. Anguilliformes, inflexible fishes that are aquatically propelled by the flexing of the caudal pedunc and caudal fin b. wrasses, which aquatically propel themselves via pulsations of the pectoral fin and Carangiforme Scombridae (tunas and mackerels), which are the most languid (laggard) natators (swimmers) d. trout, which locomote almost exclusively with the caudal peduncle and caudal fin which locomote via restricted caudal undulations (flexures) 13. Teleosts a. brake (arrest motion) by laterally compressing paired fins and extending the posterior portion of unpaired fins to one side b. may potently pulse pectoral fins anteriorly, applying energy in a posterior direction, which tends counteract the expulsion of water from branchiae that tends to propel a fish in an anterior directi c. generate pulsations in the caudal fin that prevent it from rising from the water, and alter direction extending fins on latera (sides of the body) d. produce eggs containing exiguous yolk e. that are marine generally deposit an exiguous quantity of eggs 14. Teleostei include a blenny (Andamia tetradactyla) [Percomorphacea] that repasts (feeds) on (rock-bearing) algae Periophthalmodon schlosseri (Percomorphacea), which repasts on algae on mudflats b. Poecilidae ["variegated family"] (eg. guppies, mollies, platys, swordtails), which are oviparous c. Syngnathidae (seahorses, sea dragons, pipefishes), in which the female possesses an incubationa bursa (brood pouch) where eggs may be inseminated by a male d. Syngnathidae, in which the male is larger than the female e. Syngnathidae, in which the female becomes a male if her partner dies 15. Teleostei include a. anenomefishes and clownfishes of the genus, Amphiprion ("a saw on both sides"), which are protogynous b. amphipriones (plural), among which the male is the larger sex representatives of Amphiprion, in which a mature male can be transformed into an oviparous which is able to accommodate numerous eggs 16. Teleostei include a. the protandrous bluehead wrasse (Thalassoma bifasciatum ("two-banded sea-body") b. representatives of Hypoplectrus, among which a harem of seven exiguous hermaphrodites m an ample functional male that was formerly a hermaphrodite c. parthenogenetic (gynogenetic) fishes, in which the female ova are haploidExplanation / Answer
12. (b) Wrasses, which aquatically propel themselves via pulsations of the pectoral fin and carangiformes which locomote via restricted caudal undulations.
Anguiliformes swim by generating body waves which travel the length of their bodies.
Trout swim with help of pectoral fins.
Scrombridae are fast-swimmers.
13.
marine teleost species contain mass of yolk in their eggs.
14. (a) a blenny, being an air-breathing fish, inhabits intertidal rocky shorelines and repasts on rock bearing algae.
Periphthalmodon repasts on the alga found in its habitat , muddy shores.
Species of Poecilidae are viviparous mostly.
male individuals of Syngnathidae contains brood pouch.
15. Teleostei include representatives of Amphiprion, in which a mature male can be transformed into an oviprous which is able to accommodate numerous eggs.
Amphiprion females are larger than males and they are Protandry in absence of female.
16. Teleostei include representatives of Hypoplectrus, among which a harem of seven exiguous hermaphrodites mate an ample functional male that was formerly a hermaphrodite. (simultaneous hermaphrodite
Teleost are gynogenetic but female ova are unreduced (diploid) and they need stimulation to develop into embryo from sperm of closely related male, although they does not fuse.
Bluehead wrasse are protogynous; male and female both develop into a terminal male eventually.
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