BIOL 152 Lecture Notes - Lecture 7: Gastrointestinal Tract, Archenteron, Pinacoderm

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2 Mar 2020

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Bio 152 subject 7 for exam 3 cleavage repeated divisions of zygote to form multicellular embryp blastula ball of cells gastrula. When the layers of embryonic tissues that will develop into adult body parts are produced. One end of the embryo folds inward, expands and fills the blastocoel producing 2 layers of embryonic tissue. archenteron. The endoderm-lined cavity, formed during the gastrulation process, that develops into the digestive tract of an animal. blastopore. The opening of the archenteron in the gastrula that develops into the mouth in protostomes and the anus in deuterostomes embryonic germ layers ectoderm, mesoderm, endoderm ectoderm. One of the three primary (embryonic) germ layers formed during gastrulation. Ectoderm ultimately forms external structures such as the skin, hair, nails, and inner linings of the mouth and anus, as well as the entire nervous system. endoderm. Digestive tract lining; respiratory system; urinary bladder; digestive organs; liver; many glands mesoderm.

Related Questions

An organism with extensive yolk, such as the chick,

A) has incompletecleavage. D)forms a blastoderm but no blastocoel.

B) has yolk evenly distributed in the egg. E) has completecleavage.

C) fails to synthesize DNA duringcleavage.

Invagination

A) occurs in sea urchins.

B) forms the archenteron in echinoderms.

C) creates unique positions for new cell interactions.

D) requires unique cell movement.

E) All of the above

When the blastopore dorsal lip is grafted from one frog embryoonto a second embryo, the second dorsal lip will

A) change the developmental fate of the surrounding cells.

B) change the polarity of the adjacent segments.

C) cause rapid cell division.

D) block gastrulation.

E) change the prospective potency of the surrounding cells.

Gastrulation in birds differs in many ways from gastrulation infrogs. The main feature that both have in common is that

A) the neural tube forms.

B) somites are created.

C) cells from the surface of the blastocyst migrate to form thegut.

D) three germ layers are established.

E) All of the above

In humans, the secondary oocyte forms:

at ovulation.
during telophase I.
after fertilization.
at birth.
all of the above.

In Ascaris:

The secondary oocyte is fertilized.
Two polar bodies are visible when the secondary oocyte is inprophase II.
Both a haploid and a diploid nucleus are present in a primaryoocyte during early prophase I.
Cell plates are formed during both anaphase I and anaphaseII.
No correct answer is given.

A gastrula is:

a. an embryo that is younger than a blastula.

b. a stage in development that has three tissue layers.

c. a type of egg that has yolk concentrated at one end of thecell.

d. an opening in the center of an early embryo.

e. something else

A human cell containing 22 autosomes and one Y chromosome isa

a. somatic cell of amale b. zygote

c. somatic cell of afemale d. a sperm e. an ovum

The spermatogonium is ________ , and the primary spermatocyteis __________ .

a. diploid,haploid b. haploid, diploid

c. haploid,haploid d. diploid,diploid e. triploid, diploid

The first cavity formed in the rapidly dividing starfish embryois the:

a. Blastoderm. b. Archenteron.

c. Neural groove. d. Blastocoel. e. Trophoblast.

purplegnat545

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 152 Lecture Notes - Lecture 7: Gastrointestinal Tract, Archenteron, Pinacoderm

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