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DEVELOPMENT
1-Nervous system forms from
a) Ectoderm b) Endoderm c) Mezoderm
d) Morula e) Gastrula
2-The development of an egg without fertilized by a sperm is known as ;
a) Metamorphosis b) Regeneration c) Differentiation d) Parthenogenesis e) Incubation
3-The embryo of a mammal develops in the structure called the ;
a) Ureter b) Uterus c) Urethra d) Pistil e) Ovary
4- Two eggs are fertilized by two sperm
a) multiple alleles b) sex chromosomes c) autosomes d) Fraternal twins e) Identical twins
5- One egg is fertilized by one sperm; must be same sex
a) multiple alleles b) sex chromosomes c) autosomes d) Fraternal twins e) Identical twins
6-Talking into account the needs of the developing organism, which type of reproduction would have the least amount of yolk?
a)oviparous b) ovoviviparous c) viviparous
d) all have the same amount
e) the needs of the developing organism are unrelated to the type of reproduction used.
7-Which is not true concerning fraternal twins?
a) They result from the simultaneous release of two eggs.
b) They are usually siblings of the same sex.
c)They have approximately 25% of their genetic information in common.
d)They have separate fetal membranes during their development.
e)none of the above.
8- Which of the following structures is involved in removal of wastes from the embryo in removal of wastes from the embryo in birds and reptiles ?
A)Amino B)Placenta C)Vitellus D)Chorion E)Allantois
9- Examine the list of the following structure.
I. Shell
II. Chorion
III. Amnion
IV. Vitellus
V. Allantois
Which of these above are generated during embryonic development ?
A) 1 and 2 B) 1and 5 C) 2 and 3 D) 3 and 4 E) 4 and 5
10- Which of the following structure does not develop in coelentrates that have no body cavity ?
A) Nervous System
B) Mesoderm
D) Secretory cell
E) Blastopore
11- A germinating seed uses its own food reserves until
A) respiration is initiated in the root cells
B) growth hormones are secreted
C) the seed coat reputes due to water adsorption
D) water adsorption is initiated from the root hairs
E) cells are satisfied by food produced from photosynthesis
12- Which of the following is not an experiment designed to investigate embryonic induction ?
A) removal of one cell from amoral containing a pair of blastomeres
B) removal of dorsal mesoderm from an embryo
C) segregation of to blastomeres after their first division
D) insertion of plate between the ectoderm and optic cells.
E) Isolation of a sperm nucleus and its placement it into an egg that has last its nucleus
13- In which of the following option are the factors require for seed germination listed together ?
A) Oxygen, light and temperature
B) CO2 , water and light
C) Water, oxygen and temperature
D) Temperature, water and CO2
E) Light, water and oxygen
14- Which of the following is incorrect for a human embryo ?
A) The blood groups of the fetus may vary
B) The CO2 in the blood of the fetus is exerted via the respiratory organs of the mother
C) The nitrogenous wastes in the blood of the fetus is exerted via the kidney of the mother
D) The embryo takes nutrients from its mothers blood
E) The mothers blood circulates in fetal blood vessels
15- Which of the following animal groups would be expected to have the smallest vitallus sac in their embryo?
A) Externally fertilized organisms
B) Organisms whose embryo is nuterfied from the blood of the mother
C) Internally fertilized organisms
D) Organisms whose embryo is protected by the mother
E) Organisms with an allatois
16-Which developmental sequence is correct?
a)Cleavege-Blastula-Gastrula-Morula
b)Cleavege-Gastrula-Morula-Blastula
c)Cleavege-Morula-Blastula-Gastrula
d)Gastrula-Morula-Blastula-Cleavege
e)Morula-Cleavege-Gastrula-Blastula
17- The least amount of yolk would be found in the egg of a
a)Bird b)Fish c)Frog d)Placental mammal e) Reptile
18- After gastrulation the ectoderm differentiates into the
a) Circulatory system b) Nervous system
c) Liver d) Bones e) Muscle
19- A mammal embryo obtains oxgen from
a) Its lungs b) The amnion c) Its brain
d) The
uterus e) Its mothers blood
20- Which developmental sequence is correct?
a. cleavage, blastula, gastrula, and morula
b. cleavage, gastrula, morula, and blastula
c. cleavage, morula, blastula, and gastrula
d. gastrula, morula, blastula, and cleavage
e. morula, cleavage, gastrula, and blastula
21-. Which of the following does NOT occur during cleavage of an animal
zygote?
a. The cell undergoes mitosis.
b. The nuclear-to-cytoplasmic ratio of the cells increases.
c. The ratio of surface area to volume of the cells increases.
d. The embryo grows significantly in mass.
e. The cell undergoes cytokinesis.
22-. Extraembryonic membranes develop in which of the following?
I. mammals
II. birds
III. lizards
a. I only
b. II only
c. I and II only
d. II and III only
e. I, II, and III
23-. The least amount of yolk would be found in the egg of a
a. bird.
b. fish.
c. frog.
d. placental mammal.
e. terrestrial reptile.
24-. After gastrulation, the outer-to-inner sequence of tissue layers in
a vertebrate is
a. endoderm, ectoderm, mesoderm.
b. mesoderm, endoderm, ectoderm.
c. ectoderm, mesoderm, endoderm.
d. ectoderm, endoderm, mesoderm.
e. endoderm, mesoderm, ectoderm.
25--The proper sequence of step {1-gastrula 2-zygote 3-egg 4-blastula 5-two celled stage}
a)5-2-3-4-1 b)3-5-2-4-1 c)3-2-4-1-5 d)3-2-5-4-1 e)3-2-5-1-4
26--The ectoderm develops into the
a)circulatory system b)nervous system c)liver d)muscles e )bone
27- Fraternal twins
a)may be of the opposite sex b)are always of the same sex c)develop from one egg fertilized by two sperm
d) develop from one egg fertilized by one sperm
e)are nourished from one plasenta
28--A mammal embryo obtains oxygen from
a)its mother`s bloodstream b)its lungs c)the amniotic fluid
d)oxidation of its food e)its diaphragm
29-- In the bird egg, which of the following functions as a reservoir for wastes produced during
development?
A- Allantois
B- Amnion
C- Chorion
D- Yolk sac
E-Placenta
30-- Which of the following is derived from the ectodermal germ layer?
A- Mammary glands
B- Thyroid gland
C- Liver
D- Eustachian tube
E-Adrenal cortex
31--In the development of the frog,which of the following is the correct sequence following fertilization?
A) Cleavage,gastula, larva, blastula
B) Cleavage,blastula, gastula, larva,
C) Cleavage,blastula, larva, gastula,
D) Blastula,cleavage, gastula, larva,
E) Blastula, larva, gastula, cleavage,
32--When does the endoderm first appear, and what will it give rise to in the fully developed human?
A) gastrulation, tooth and neural tissue
B) blastula, lining of gut and accessory organs of gut (digestive tract)
C) gastrulation , lining of gut and accesory organs of gut
D) cleavage, muscles and connective tissue
33-When does the endoderm first appear, and what will it give rise to in the fully developed human?
34-- The three germ(embryonic)layers are
35-. Examine the list of following structures
I. shell
II. chorion
III. amnion
IV. vitellus
V. allantois
Which of the above contains food for the developing of embryo?
A)I B)II C)III D)IV E)V
36-. In which of the following is the development internal?
A)Human B)Fish C)Frog D)Chicken E)Spider
37- Which substances cannot normally cross the placenta?
A. red blood cell antigens . viruses . carbon dioxide D. Drugs E. hormones
38-. In humans, the extraembryonic membrane in contact with the uterus is the
A. Allantoisb. Yolk sac c. Amnion d. Chorion e. Endometrium
39-. The amnion in mammals is most useful in
D. Transporting oxygen from the placenta
E. Storing food for the fetus