Site MapHelpFeedbackSimple Multiple Choice
Simple Multiple Choice
(See related pages)

1
Differentiation and reproduction are the major functions of any organism's
A)body organization
B)embryogenesis
C)development
D)embryology
2
What term best describes all of the mechanisms that produce cellular diversity and order during an individual's development?
A)differentiation
B)embryogenesis
C)gastrulation
D)organogenesis
3
Meiosis differs from mitosis in which of the following ways?
A)meiosis produces haploid cells; mitosis, diploid cells
B)meiotic daughter cells are genetically different from the parent cell
C)crossing over occurs in meiosis but not in mitosis
D)all of the above
4
When does crossing over occur?
A)Prophase I
B)Prophase II
C)Metaphase I
D)Anaphase II
5
All of a woman's primary oocytes are produced
A)between the ages of 16 and 24 years
B)within a year after she reaches puberty
C)before she is born
D)none of the above
6
In each meiotic division of oogenesis, one of the daughter cells receives most of the cytoplasm while the other forms a
A)pronucleus
B)polar body
C)primary oocyte
D)secondary oocyte
7
Unlike oogonia, ____________ always divide first by mitosis before undergoing meiosis.
A)spermatogonia
B)primary spermatocytes
C)secondary spermatocytes
D)spermatids
8
A mature sperm cell has all of the following components except
A)an acrosome containing digestive enzymes
B)a nucleus with 22 autosomes and 1 sex chromosome
C)a midpiece and a long tail called a flagellum
D)a large amount of cytoplasm surrounding the nucleus
9
Which one of the following is not a stage of embryogenesis?
A)cleavage
B)meiosis
C)gastrulation
D)organogenesis
10
Which stage of an individual's developmental history typically lasts the longest?
A)cleavage
B)gastrulation
C)organogenesis
D)maturation
11
The fusion of two haploid sex cells to produce a diploid zygote is
A)capacitation
B)fertilization
C)development
D)differentiation
12
Sperm cells must undergo ____________ within the female reproductive tract before they can fertilize a secondary oocyte.
A)capacitation
B)meiosis
C)spermiogenesis
D)none of the above
13
All major organ systems appear in the early form of a distinctly humanlike body during the
A)pre-embryonic period
B)second trimester
C)embryonic period
D)fetal period
14
The series of mitotic divisions that transforms the zygote into a blastocyst is called
A)cleavage
B)implantation
C)placentation
D)embryogenesis
15
Implantation marks the end of the ____________ stage of development.
A)prenatal
B)pre-embryonic
C)embryonic
D)fetal
16
Implantation of the blastocyst involves all of the following except
A)prior development for at least two weeks within the uterine lumen
B)subdivision of the trophoblast into a cellular inner layer and a thick outer layer
C)burrowing into the endometrium by cells of the syncytiotrophoblast
D)contact between the blastocyst and pools of nutrients in the uterine glands
17
The embryoblast portion of the blastocyst is called the bilaminar germinal disc, or
A)hypoblast
B)epiblast
C)trophoblast
D)blastodisc
18
The blastocyst is approximately the same size as
A)a sperm cell
B)a zygote
C)a grain of rice
D)none of the above
19
Gastrulation begins with the formation of the
A)primitive streak
B)hypoblast layer
C)cytotrophoblast
D)endoderm layer
20
The three primary germ layers that form during gastrulation are the
A)primary, secondary, and tertiary layers
B)superficial, middle, and deep layers
C)ectoderm, mesoderm, and endoderm
D)epiblast, hypoblast, and periblast
21
The three extraembryonic membranes are the
A)blastocyst, morula, and trophoblast
B)yolk sac, amnion, and chorion
C)endoderm, mesoderm, and ectoderm
D)amnion, body stalk, and yolk stalk
22
The connecting stalk that attaches the early embryo to the placenta is the precursor to the
A)umbilical cord
B)chorionic villi
C)yolk sac
D)umbilical vein
23
Differential growth beginning in the late third and fourth weeks of development results in which of the following?
A)cephalocaudal folding of the embryo
B)transverse folding of the embryo
C)transformation of the flat embryonic disc into a cylindrical embryo
D)all of the above
24
Which body structures develop from ectoderm?
A)the epidermis, epidermal derivatives, and nervous system tissue
B)most components of the urinary, reproductive, and digestive systems
C)the cardiovascular system, linings of body cavities, and connective tissue
D)all of the above
25
The inductive process that transforms a flat layer of ectodermal cells into a hollow nervous system tube is called
A)invagination
B)neurulation
C)notochord formation
D)gastrulation
26
Which body structures develop from mesoderm?
A)the notochord and most bone, muscle, and connective tissues
B)components of the urinary, reproductive, and cardiovascular systems
C)linings of the body cavities
D)all of the above
27
All of the following develop from endoderm except
A)the adrenal cortex, adrenal medulla, and spleen
B)the thymus, parathyroid glands, and most of the liver
C)epithelial lining of the respiratory and GI tracts
D)the gallbladder, pancreas, and thyroid gland
28
By the end of week 8, the embryo is barely over ____________ long but already has the outward appearance of a human as well as the beginnings of most organ systems.
A)3 millimeters
B)10 millimeters
C)1 inch
D)4 inches
29
Sex organs begin to develop during weeks ____________ of embryogenesis.
A)1 to 8
B)9 to 12
C)13 to 16
D)17 to 20
30
During the last 30 weeks of prenatal development the unborn organism is called
A)an embryo
B)a neonate
C)a fetus
D)none of the above







McKinleyOnline Learning Center

Home > Chapter 3 > Simple Multiple Choice