Question 1

Apoptosis begins when ____ is inactivated.

Accepted Answer

A)  CED-3 
B)  CED-4 
C)  CED-9 
D)  the death signal receptor 
E)  a nuclease 
A)  CED-3 
B)  CED-4 
C)  CED-9 
D)  the death signal receptor 
E)  a nuclease

Question 2

The process of apoptosis can remove structures, such as mammary tissue in male mammals.

Accepted Answer

A) True 
 B)False

Question 3

The correct sequence of embryonic development is ____.

Accepted Answer

A)  gastrulation, organogenesis, and fertilization 
B)  cleavage, gastrulation, and organogenesis 
C)  gastrulation, fertilization, and organogenesis 
D)  gastrulation, cleavage, and organogenesis 
E)  fertilization, organogenesis, and cleavage 
A)  gastrulation, organogenesis, and fertilization 
B)  cleavage, gastrulation, and organogenesis 
C)  gastrulation, fertilization, and organogenesis 
D)  gastrulation, cleavage, and organogenesis 
E)  fertilization, organogenesis, and cleavage

Question 4

Which structure of the eye is matched appropriately with its developmental origin?

Accepted Answer

A)  ectoderm → cornea 
B)  crystallin → cornea 
C)  optic cup → lens 
D)  crystallin → retina 
E)  mesoderm → retina 
A)  ectoderm → cornea 
B)  crystallin → cornea 
C)  optic cup → lens 
D)  crystallin → retina 
E)  mesoderm → retina

Question 5

In sea urchin embryogenesis, the mouth is formed ____.

Accepted Answer

A)  where the archenteron contacts the ectoderm 
B)  by the blastopore 
C)  by the blastocoel 
D)  by migrating secondary mesenchyme cells 
E)  where the blastopore contacts the ectoderm 
A)  where the archenteron contacts the ectoderm 
B)  by the blastopore 
C)  by the blastocoel 
D)  by migrating secondary mesenchyme cells 
E)  where the blastopore contacts the ectoderm

Question 6

Muscles originate from the ____.

Accepted Answer

A)  ectoderm only 
B)  endoderm only 
C)  mesoderm only 
D)  ectoderm and endoderm 
E)  ectoderm and mesoderm 
A)  ectoderm only 
B)  endoderm only 
C)  mesoderm only 
D)  ectoderm and endoderm 
E)  ectoderm and mesoderm

Question 7

Scientists have traced the cell lineage of every somatic and germ-line cell in C. elegans and found that the resulting embryo differentiates into an adult hermaphrodite that has exactly _____ cells or an adult male that has _____ cells.

Accepted Answer

A)  1,031; 959 
B)  959; 1,551 
C)  959; 1,031 
D)  1,551; 959 
E)  1,551; 1,031 
A)  1,031; 959 
B)  959; 1,551 
C)  959; 1,031 
D)  1,551; 959 
E)  1,551; 1,031

Question 8

The blastopore is the ____.

Accepted Answer

A)  opening of the archenteron at the animal pole 
B)  opening of the archenteron at the vegetal pole 
C)  outer layer of the blastula 
D)  cavity in the blastula formed by invagination 
E)  region of the blastula establishing dorsal-ventral polarity 
A)  opening of the archenteron at the animal pole 
B)  opening of the archenteron at the vegetal pole 
C)  outer layer of the blastula 
D)  cavity in the blastula formed by invagination 
E)  region of the blastula establishing dorsal-ventral polarity

Exam 50: Animal Development

Apoptosis begins when ____ is inactivated.

The process of apoptosis can remove structures, such as mammary tissue in male mammals.

The correct sequence of embryonic development is ____.

Which structure of the eye is matched appropriately with its developmental origin?

In sea urchin embryogenesis, the mouth is formed ____.

Muscles originate from the ____.

Scientists have traced the cell lineage of every somatic and germ-line cell in C. elegans and found that the resulting embryo differentiates into an adult hermaphrodite that has exactly _____ cells or an adult male that has _____ cells.

The blastopore is the ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Scientists have traced the cell lineage of every somatic and germ-line cell in C. elegans and found that the resulting embryo differentiates into an adult hermaphrodite that has exactly _ cells or an adult male that has _ cells.