BIOL 1004 Lecture Notes - Lecture 19: Chordate, Cestoda, Love Dart

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scarletcheetah369

27 Mar 2017

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Animal development: after a sperm fertilizes an egg, a zygote is formed and undergoes rapid division called cleavage, the cleavage forms a multicellular ball called a blastula. One end of it folds inward during the gastrulation phase: a pouch is formed inside the blastula from the gastrulation, layering into different germ layers that have different functions. (see slides for diagram and description) Cnidarians (jellyfish, anemone, corals) have only 2 germ layers (endo- and ectoderm) so they are called diploblastic. A (cid:862)true gut(cid:863) is (cid:374)e(cid:448)er for(cid:373)ed so the(cid:455) feed a(cid:374)d defi(cid:272)ate through the sa(cid:373)e passage i(cid:374) the body. In contrast, all other animals will have a mouth and an anus, surrounded by another tube that is called the body cavity. The mesoderm completely fills the space between the ectoderm and the endoderm. Note: summaries on the slides and better explanations in the textbook.

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 1004 Lecture Notes - Lecture 19: Chordate, Cestoda, Love Dart

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