Question 1

During gastrulation the blastocoel becomes

Accepted Answer

A)  the coelom. 
B)  the archenteron. 
C)  the blastopore. 
D)  filled with the hypoblast. 
E)  obliterated. 
A)  the coelom. 
B)  the archenteron. 
C)  the blastopore. 
D)  filled with the hypoblast. 
E)  obliterated.

Question 2

Nervous tissue forms from

Accepted Answer

A)  ectoderm. 
B)  mesoderm. 
C)  endoderm. 
D)  a combination of ectoderm and mesoderm. 
E)  coelom. 
A)  ectoderm. 
B)  mesoderm. 
C)  endoderm. 
D)  a combination of ectoderm and mesoderm. 
E)  coelom.

Question 3

Cell shape is a common feature during the process of morphogenesis. Which of the components of the cytoskeleton is the most important in driving cell morphology changes during this developmental stage?

Accepted Answer

A)  Microfilaments 
B)  Microtubules 
C)  Actin filaments 
D)  Intermediate filaments 
E)  All of the cytoskeletal structural proteins are equally important during morphogenesis 
A)  Microfilaments 
B)  Microtubules 
C)  Actin filaments 
D)  Intermediate filaments 
E)  All of the cytoskeletal structural proteins are equally important during morphogenesis

Question 4

If a zygote has a high concentration of yolk that is unevenly distributed, then cytokinesis

Accepted Answer

A)  takes place throughout the embryo, but cleavage divisions proceed more slowly in the vegetal region. 
B)  takes place throughout the embryo, but cleavage divisions proceed more slowly in the animal region. 
C)  takes place throughout the embryo, and cleavage divisions proceed at about the same rate in all parts of the embryo. 
D)  is confined to the yolk and produces a disc of cells between the yolk and the cavity. 
E)  is confined to the yolk-free portion of the zygote. 
A)  takes place throughout the embryo, but cleavage divisions proceed more slowly in the vegetal region. 
B)  takes place throughout the embryo, but cleavage divisions proceed more slowly in the animal region. 
C)  takes place throughout the embryo, and cleavage divisions proceed at about the same rate in all parts of the embryo. 
D)  is confined to the yolk and produces a disc of cells between the yolk and the cavity. 
E)  is confined to the yolk-free portion of the zygote.

Exam 21: Animal Development

During gastrulation the blastocoel becomes

Nervous tissue forms from

Cell shape is a common feature during the process of morphogenesis. Which of the components of the cytoskeleton is the most important in driving cell morphology changes during this developmental stage?

If a zygote has a high concentration of yolk that is unevenly distributed, then cytokinesis

Nature of Molecules

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

The Genetic Code

Gene Expression

Genomes, Mutation and Cancer

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Metabolism, Temperature Regulation and Environmental Stress

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Nervous Systems

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Simple Animals: Sponges to Flatworms

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

Living in Communities

Ecosystems

Human Impacts

Filters