BIOL 111 Lecture Notes - Lecture 11: Bilateria, Monogenea, Coral Bleaching

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9 Aug 2016

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BIOL 111 Full Course Notes

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Lecture 11 embryonic development and symmetry; cnidarians and platyhelminthes. = diploid cell resulting from union of two haploid gamete; 1st cell of next generation. Embryo= young animal or plant while it is still contained within a protective structure. Cleavage: zygote 2-cell stage --> morula (gastrulation) blastula gastrula. Layers of embryonic cells are called germ layers: Endoderm inner skin lining of digestive and respiratory sytem (2 germ layers = diploblastic) Mesoderm middle skin most internal organs (3 germ layers = triploblastic) Archenteron old gut digestive space (gut cavity) Tissues enable complex body organization while the gut enables extracellular digestion. Multicellularity from sponges onwards (intracellular digestion, limited tissues) 2 embryonic cell layers from cnidarians (diplolastic, blind gut, radial symmetry) 3 embryonic cell layers, bilateral symmetry from acoelomorpha onwards. Cephalization, cns, coelom from rotifers, flatworms (triploblasts, blind gut, bilateral symmetry) Most life cycles include both body plans. Obtain energy via using cnidocytes to capture prey, inject, and stick (carnivorous)

Related Questions

1)Mushrooms and other fungi were once lumped in with the plant kingdom. Modern science has separated them into their own kingdom. Kingdom Fungi is distinguished from Kingdom Plantae by the fact that unlike plants fungi.

A)grow a haploid multicellular form from a haploid spore

B)have no cell walls

C)grow, rather than locomote, toward resources

D)are absorptive heterotrophs.

E)have no haploid multicellular stage

2)Members of the Kingdom Fungi are easily distinguished from the Kingdom Plantae because the Fungi

A)Do not have photosynthtic pigments.

B)Are mostly not adapted for living on land

C)Do not have cell walls

D)are primarily unicellular

E)All the above

3)Which of the following would NOT be part of a lichen?

A)chlorophytes

B) zygosporangia

C) basidiocarps

D)Soredia

E)Asci

4)The process of metamorphosis transforms a ______ into a ______________.

A)larva; sexually mature adult

B) blastopore;mouth

C)pseudocoelom; true coelom

D)zygote;blastula

E)blastula;gastrula

5)Which of the following tissues or structures could NOT be derived from ectoderm?

A) all but the digestive tract of a jellyfsh

B) all thin skin of a platyhelminth

C)the brain of a squid

D) the muscles of a nematode

E)your epidermis

6)Which of the following is NOT a characteristic of the phylum Platyhelminthes?

A) true mesodermal tissue

B) cephalization involving concentration of nerve ganglia

C) gas and water exchange is across the thin body wall

D) free living and parasitic form

E) segmentation

7)A triploblastic animal in which the fluid?filled body cavity is only partially lined (lined on one side) with mesodermal tissue is referred to as:

A)coelomate

B)deuterostome

C)acoelomate

D)protostome

E)pseudocoelomate

8)Which of the following groups are diploblastic animals?

A)corals

B) sponges

C) comb jellies

D) a and b

E) a and c

9)Animals that actively move in a unidirectional fashion through their environment would be expected to exhibit which of the following characteristics?

A) bilateral symmetry

B) sponges

C) comb jellies

D) a and b

E) a and c

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BIOL 111 Lecture Notes - Lecture 11: Bilateria, Monogenea, Coral Bleaching

BIOL 111 Full Course Notes

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