Question 1

Which term refers to the unequal distribution of yolk in an egg?

Accepted Answer

A) neurulation 
B) cleavage 
C) polarity 
D) involution 
A) neurulation 
B) cleavage 
C) polarity 
D) involution

Question 2

Match each term with its definition.
-chorionic villi

Accepted Answer

A) undifferentiated muscle cells 
B) pigmented layer of cytoplasm opposite from point of entry of sperm 
C) rounded layer of cells at the surface of yolk in birds 
D) solid rod of tissue that is involved in neurulation 
E) fingerlike extensions into the endometrium
F)clear fibrous protein
G)programmed cell death
H)event when a group of cells influences a nearby group of cells 
A) undifferentiated muscle cells 
B) pigmented layer of cytoplasm opposite from point of entry of sperm 
C) rounded layer of cells at the surface of yolk in birds 
D) solid rod of tissue that is involved in neurulation 
E) fingerlike extensions into the endometrium
F)clear fibrous protein
G)programmed cell death
H)event when a group of cells influences a nearby group of cells

Question 3

What happened in the experiments where cytochalasin was added to a developing neural plate?

Accepted Answer

A) Cytochalasin had no effect on microfilament growth or invagination of the ectoderm. 
B) Microfilament growth was enhanced and invagination of the ectoderm did not result. 
C) Microfilament growth was impaired and invagination of the ectoderm resulted. 
D) Microfilament growth was impaired and invagination of the ectoderm did not result. 
A) Cytochalasin had no effect on microfilament growth or invagination of the ectoderm. 
B) Microfilament growth was enhanced and invagination of the ectoderm did not result. 
C) Microfilament growth was impaired and invagination of the ectoderm resulted. 
D) Microfilament growth was impaired and invagination of the ectoderm did not result.

Question 4

Match each term to its definition.
-neural plate

Accepted Answer

A) fluid-filled cavity within the blastomere 
B) stage in which an embryo has three tissue layers 
C) solid ball of blastomeres 
D) opening that eventually becomes the anus 
E) process that involves an increase in number of cells, but not an increase in mass
F)early stage in formation of the nervous system
G)second stage of cleavage; a formed hollow cavity 
A) fluid-filled cavity within the blastomere 
B) stage in which an embryo has three tissue layers 
C) solid ball of blastomeres 
D) opening that eventually becomes the anus 
E) process that involves an increase in number of cells, but not an increase in mass
F)early stage in formation of the nervous system
G)second stage of cleavage; a formed hollow cavity

Question 5

How long is gestation in humans?

Accepted Answer

A) about 266 days 
B) about 231 days 
C) about 206 days 
D) about 178 days 
A) about 266 days 
B) about 231 days 
C) about 206 days 
D) about 178 days

Exam 42: Animal Development

Which term refers to the unequal distribution of yolk in an egg?

Match each term with its definition. -chorionic villi

What happened in the experiments where cytochalasin was added to a developing neural plate?

Match each term to its definition. -neural plate

How long is gestation in humans?

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Transport in Animals: the Circulatory System

Reproduction in Animals

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

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