Question 1

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion.  
-Step VI

Accepted Answer

A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate. 
A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate.

Question 2

Which of the following statements about human chorionic gonadotropin is not correct?

Accepted Answer

A) It is released by the placentA. 
B) It stimulates the release of oxytocin from the mother's pituitary. 
C) It is the hormone assayed in pregnancy tests. 
D) It is almost identical to the action of lutenizing hormone. 
E) It maintains the mother's corpus luteum. 
A) It is released by the placentA. 
B) It stimulates the release of oxytocin from the mother's pituitary. 
C) It is the hormone assayed in pregnancy tests. 
D) It is almost identical to the action of lutenizing hormone. 
E) It maintains the mother's corpus luteum.

Question 3

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion.  
-Step III

Accepted Answer

A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate. 
A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate.

Question 4

In mammals,egg activation is characterized by all of the following except

Accepted Answer

A) prevention of entry of other sperm by changes in the egg membrane. 
B) stimulation of the egg chromosomes to complete the second meiotic division. 
C) one of the two nuclei is extruded from the egg as a second polar body. 
D) cytoplasmic movements triggered around the point of sperm entry. 
E) the cleavage of sperm nuclei. 
A) prevention of entry of other sperm by changes in the egg membrane. 
B) stimulation of the egg chromosomes to complete the second meiotic division. 
C) one of the two nuclei is extruded from the egg as a second polar body. 
D) cytoplasmic movements triggered around the point of sperm entry. 
E) the cleavage of sperm nuclei.

Question 5

The trophoblast implants into the endometrial lining of the mother's uterus and becomes the ________ membrane.

Accepted Answer

A) chorionic 
B) amnionic 
C) umbilical 
D) placental 
A) chorionic 
B) amnionic 
C) umbilical 
D) placental

Question 6

In mammals,the embryonic cells form an inner cell mass that will become the body of the embryo and a layer of surrounding cells called the ____________________.

Accepted Answer

A) blastocoel 
B) yolk 
C) blastodisc 
D) trophoblast 
A) blastocoel 
B) yolk 
C) blastodisc 
D) trophoblast

Question 7

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion.  
-Step II

Accepted Answer

A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate. 
A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate.

Question 8

Choose the letter of the best match from the following:
-The heart begins to beat.

Accepted Answer

A) third trimester of pregnancy 
B) second month of pregnancy 
C) first month of pregnancy 
D) second trimester of pregnancy 
E) third month of pregnancy 
A) third trimester of pregnancy 
B) second month of pregnancy 
C) first month of pregnancy 
D) second trimester of pregnancy 
E) third month of pregnancy

Question 9

Which of the following is not a fetal membrane?

Accepted Answer

A) amnion 
B) endometrium 
C) chorion 
D) yolk sac 
E) allantois 
A) amnion 
B) endometrium 
C) chorion 
D) yolk sac 
E) allantois

Question 10

Birth occurs in response to uterine contractions stimulated by

Accepted Answer

A) FSH and prostaglandins. 
B) LH and prostaglandins. 
C) oxytocin and prostaglandins. 
D) prolactin and prostaglandins. 
E) hCG and prostaglandins. 
A) FSH and prostaglandins. 
B) LH and prostaglandins. 
C) oxytocin and prostaglandins. 
D) prolactin and prostaglandins. 
E) hCG and prostaglandins.

Question 11

Removing some fluid from directly around a developing human fetus is performed by inserting a long needle into the belly of the female patient.What membranes will be punctured in this process?

Accepted Answer

A) chorion 
B) amnion 
C) chorionic villi 
D) external epithelium of mother 
A) chorion 
B) amnion 
C) chorionic villi 
D) external epithelium of mother

Question 12

Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called

Accepted Answer

A) blastulation. 
B) archenteron formation. 
C) morulla formation. 
D) gastrulation. 
E) cleavagE. 
A) blastulation. 
B) archenteron formation. 
C) morulla formation. 
D) gastrulation. 
E) cleavagE.

Question 13

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion.  
-Step V

Accepted Answer

A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate. 
A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate.

Question 14

An outpouching of the gut that serves to store the uric acid excretion in the urine of developing birds is called the

Accepted Answer

A) acrosome. 
B) archenteron. 
C) placenta. 
D) chorion. 
E) allantois. 
A) acrosome. 
B) archenteron. 
C) placenta. 
D) chorion. 
E) allantois.

Question 15

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion.  
-Step I

Accepted Answer

A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate. 
A) Some of the zona pellucida is degraded by acrosomal enzymes. 
B) Enzymes are released by cortical granules that harden the zona pellucida. 
C) Sperm and egg fuse at the plasma membrane. 
D) Sperm penetrates the cronoa radiata. 
E) The sperm nucleus dissociates and enters the cytoplasm.
F)Additional sperm can no longer penetrate.

Question 16

Which of the following leads to the occurrence of vertebrate sense organs?

Accepted Answer

A) both adrenal medullary cells and sympathetic neurons derive from the neural crest 
B) neural crest cells form both neurons that carry messages and cartilaginous bars 
C) the neural crest and associated sensory ganglia 
D) formation of the endoderm 
E) formation of the autonomic nervous system 
A) both adrenal medullary cells and sympathetic neurons derive from the neural crest 
B) neural crest cells form both neurons that carry messages and cartilaginous bars 
C) the neural crest and associated sensory ganglia 
D) formation of the endoderm 
E) formation of the autonomic nervous system

Question 17

Together,the chorionic frondosum and decidua basalis form a single functioning unit,the ________.

Accepted Answer

A) chorion 
B) placenta 
C) yolk sac 
D) amnion 
A) chorion 
B) placenta 
C) yolk sac 
D) amnion

Question 18

Which of the following activates the egg?

Accepted Answer

A) entrance of sperm into the zona pellucida 
B) contact of sperm with the outside of the zona pellucida 
C) contact of sperm with the vitelline envelope 
D) fusion of sperm and egg membranes 
E) fusion of sperm and egg nuclei 
A) entrance of sperm into the zona pellucida 
B) contact of sperm with the outside of the zona pellucida 
C) contact of sperm with the vitelline envelope 
D) fusion of sperm and egg membranes 
E) fusion of sperm and egg nuclei

Question 19

One of the hormones released by the placenta is __________,which maintains the mother's corpus luteum and is the hormone assayed in pregnancy tests.

Accepted Answer

A) hCG 
B) estrogen 
C) progesterone 
D) FSH 
E) LH 
A) hCG 
B) estrogen 
C) progesterone 
D) FSH 
E) LH

Question 20

Which of the following regarding the Spemann organizer is false?

Accepted Answer

A) The dorsal lip cells directly activate dorsal development. 
B) The organizer forms in the area of the grey crescent. 
C) The organizer determines the dorsal-ventral axis. 
D) Signaling molecules from the organizer inhibit ventral development. 
E) The point of sperm entry determines the orientation of the organizer. 
A) The dorsal lip cells directly activate dorsal development. 
B) The organizer forms in the area of the grey crescent. 
C) The organizer determines the dorsal-ventral axis. 
D) Signaling molecules from the organizer inhibit ventral development. 
E) The point of sperm entry determines the orientation of the organizer.

Exam 54: Animal Development

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion. -Step VI

Which of the following statements about human chorionic gonadotropin is not correct?

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion. -Step III

In mammals,egg activation is characterized by all of the following except

The trophoblast implants into the endometrial lining of the mother's uterus and becomes the ________ membrane.

In mammals,the embryonic cells form an inner cell mass that will become the body of the embryo and a layer of surrounding cells called the ____________________.

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion. -Step II

Choose the letter of the best match from the following: -The heart begins to beat.

Which of the following is not a fetal membrane?

Birth occurs in response to uterine contractions stimulated by

Removing some fluid from directly around a developing human fetus is performed by inserting a long needle into the belly of the female patient.What membranes will be punctured in this process?

Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion. -Step V

An outpouching of the gut that serves to store the uric acid excretion in the urine of developing birds is called the

Referring to the figure below,choose the letter of the best match from with the following steps of sperm penetration and fusion. -Step I

Which of the following leads to the occurrence of vertebrate sense organs?

Together,the chorionic frondosum and decidua basalis form a single functioning unit,the ________.

Which of the following activates the egg?

One of the hormones released by the placenta is __________,which maintains the mother's corpus luteum and is the hormone assayed in pregnancy tests.

Which of the following regarding the Spemann organizer is false?

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes Mapping and the Meiosis - Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics and the Phylogenetic Revolution

Genome Evolution

Evolution of Development

The Tree of Life

Viruses

Prokaryotes

Protists

Overview of Green Plants

Fungi

Overview of Animal Diversity

Noncoelomate Invertebrates

Coelomate Invertebrates

Vertebrates

Plant Form

Vegetative Plant Development

Transport in Plants

Plant Nutrition and Soils

Plant Defense Responses

Sensory Systems in Plants

Plant Reproduction

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Behavioral Biology

Population Ecology

Community of Ecology

Dynamics of Ecosystems

The Biosphere

Conservation Biology