Survey of Biological Progress

Teaching Biology Today

The Genes and Gene Action

Synopsis

I. The Genetics of Microorganisms

II. Mutation and the Nature of the Gene

III. The Nature of Gene Action

IV. The Gene and the Chromosome

V. Conclusion

References

Tracer Methods in Biological Research

Synopsis

I. Introduction

II. Bases of Tracer Methodology and Other Preliminaries

III. Survey of Tracer Methodology

References

Nutrition and Reproduction

Synopsis

I. Introduction

II. Invertebrates

III. Fishes, Amphibia, Reptiles

IV. Birds

V. Mammals

References

Growth and Development

Synopsis

I. General Concepts of Growth

II. Polarity and Symmetry

III. The Spermatozoon and Fertilization

IV. Cell Division

V. Biochemical Embryology

VI. Gastrulation

VII. Neurulation

VIII. Differentiation

IX. Heteroploidy

X. Effects of Radiations on Development

XI. Effects of Chemicals on Development

XII. Induction, Gene Hormones, and Genetic Control of Morphogenesis

References

Virus Tumors

I. Introduction

II. Wound-Tumor Disease

III. Cancer of the Kidney in Leopard Frogs

IV. Fowl Leucosis Complex

V. Rous Sarcoma Number 1

VI. Infectious Myxoma and Infectious Fibroma of Rabbits

VII. Infectious Papillomatosis (Warts) of Rabbits

VIII. Mammary Carcinoma of the Mouse

IX. General Considerations

References

Hormones and the Differentiation of Sex

I. Introduction

II. The Structural Basis for Sex Differentiation in the Embryo

III. The Present Status of the Problem

IV. Differentiation of the Gonad

V. Differentiation of the Sex Ducts

VI. Differentiation of the Urinogenital Sinus

VII. Differentiation of the External Genitalia

VIII. Embryonic Castration and the Hormone Theory

IX. The Nature and Identity of Sex Differentiating Agents

X. Specificity of Hormone Action and Paradoxical Effects

References

Growth Hormones and Tissue Growth in Plants

Synopsis

Introduction

Primary Effects of Hormones

The Common Denominator of These Effects

Tissue Culture. A Technique for Studying This Common Denominator

Types of Cellular Response

Types of Regeneration

Galls and Tumors

Tissue Cultures of Tumors and of Normal Tissues

Auxins as Factors in Tumor Formation

Cellular Adaptation

"Habituation" in Tissue Cultures

Tissue Autonomy

Hypotheses Concerning the Nature of Habituation

Hormones in Biology

References

Newer Methods in the Rapid Development of Disease-Resistant Vegetables

Synopsis

I. Introduction

II. Basic Relationships

III. Facilitating Flowering and Fruit Set

IV. Seed Germination

V. Seed Storage

VI. Publication

VII. Personnel Factor

VIII. The Selection Program

IX. F1 Hybrids

X. Proof of Commercial Value

XI. The Future

References

Influence of Environmental Factors on the Vitamin Content of Food Plants

I. Ascorbic Acid (Vitamin C)

II. The Influence of Climatic Factors on Ascorbic Acid Content

III. The Influence of Soil Variables on Ascorbic Acid Content

IV. The Influence of Storage, Handling, Processing and Cooking

V. Discussion

References

Ecological Studies on Populations

Synopsis

I. The Growth of a Population

II. Natality

III. Mortality

IV. Competition Between Two Species

V. Periodic Fluctuations in Population Density

References

Author Index

Subject Index