BIOL 111 Lecture 16: BIOL 111 – Lecture 16 – Fishes Precious

36 views3 pages

cyanmallard258

29 Dec 2015

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

ghaniamerabia and 32 others unlocked

BIOL 111 Full Course Notes

Verified Note

44 documents

Document Summary

Biol 111 lecture 16 fishes precious. Lecture date/time: nov 3rd, 2015 / 10:35-11:25 am. Unique to chordates have: dorsal hollow nerve cord, notochord, muscular post-anal tail. Also have: pharyngeal slits (pouches) but is something vertebrates have. Seem to be an ancestral trait in deuterostomes. Humans have them during embryonic development in womb. In vertebrates, pharyngeal tissue supported by arches. Water coming in mouth passes through slits. O2 & co2 can be exchanged across a respiratory surface = gills gills located between slits, supported by arched. Bars between the slits = gill arches. Gill filaments are on the gill arches (many off one gill arch) For later in the lesson: bony fish have 4 pairs of gill arches, each arch has many pairs of gill filaments. Bony fish also have a gill cover (operculum) Structure is thin, vascularized, high surface area. Capillary beds in gill filaments; gas exchange. Filament epithelium is one cell thick (1-2 um) very thin!

Related Questions

The chordates share several features which have played asignificant role in the evolution of the phylum. Check all of thefeatures that one would use to exclusively classify members ofChordata and not members of Echinodermata.

a postanal tail during embryonicdevelopment

pharyngeal pouches during embryonicdevelopment

an endoskeleton

a notochord on the dorsal side ofthe gut in the early embryo

deuterostomic development of theembryo

a hollow nerve cord

A number of major evolutionary innovations arose in the fishlineage. Check all of the evolutionary innovations associated withthe fishes.

Teeth arose from the rough scalesof ancestral sharks.

Skeletal developments leading tothe amphibian movement onto land probably evolved from lobe-finnedfishes.

Fish fins are ancestral(homologous) structures to the flippers (forelimbs) ofturtles.

The anterior gill arch formed thebasis for the evolution of the vertebrate jaw.

The swim bladder ultimately led to the evolution of theamphibian urinary bladder.

Select the true statements concerning echinoderms.

They have an exoskeleton made ofhardened calcium carbonate plates.

Echinoderms have radiallysymmetrical larvae that give rise to bilaterally symmetricaladults.

Tube feet are used for locomotionand grasping objects.

Echinoderms are well represented inthe fossil record.

The blastopore of a sea star becomes its anus.

11.

A leafy sea dragon (Phycodurus eques) stays in a fixedposition in the water column as a tourist walks by the display inan aquarium. How is this possible?

The fish counteracts its negativebuoyancy by using its fins.

The fish is essentially hold itsbreath while remaining motionless.

The fish gulps air.

The fish has an operculum and a swim bladder.

15.

The biggest threat to terrestrial life when compared to anaquatic one is

availability of food.

lack of oxygen.

desiccation.

finding mates.

16.

A biologist looking for synapomorphic traits for chordates wouldchoose

segmentation.

possession of a backbone.

possession of an endoskeleton.

indeterminate radial cleavage inthe early embryo.

pharyngeal slits or pouches.

17.

Cartilage and bone contributed to increased size in vertebrates.Evaluate the following statements about these endoskeletal tissuesand determine if they are true or false.

1. A key element of vertebrate bone is a series of dermal ossiclesmade out of calcium carbonate. TrueFalse
2. Bone also contains crystals of a calcium phosphatesalt. TrueFalse
3. Cartilage contains fibers of the proteincollagen. TrueFalse
4. Vertebrate muscles work against bone to provide extraordinarypowers of locomotion. TrueFalse
5. Compared to chitin, bone is much less dynamic and morebrittle. TrueFalse

19.

The breast meat in the bucket of delicious fried chicken isresponsible for

running.

20.

Whales have truly large body sizes. The only invertebrates thatattain body sizes much larger than humans are giant squids. Whatfeature do whales and giant squids share that allow them to attainsuch large sizes?

	Endothermy
	Large brains
	Highly efficient gills
	Internal skeletons

maroonarmadillo57

BIOL 111 Lecture 16: BIOL 111 – Lecture 16 – Fishes Precious

BIOL 111 Full Course Notes

Document Summary

Get access

Related Documents

BIOL 111 Lecture Notes - Lecture 22: Dorsal Nerve Cord, Branchial Arch, Parathyroid Gland

BIOL 111 Lecture Notes - Lecture 18: Appendicular Skeleton, Neutral Buoyancy, Personal Flotation Device

BIOL 111 Lecture Notes - Lecture 16: Circulatory System, Blood Vessel, Coronary Circulation

Related Questions