Search for ""

Displaying 1-20 of 69 results
Macleans

Cloning Sheep

For more than a decade, scientists have been using genetic technology to produce biologically identical copies, or clones, of animals. In theory, cloning can be used to improve sheep and cattle breeds by ensuring that the animals' most desirable genetic characteristics are passed on.

Article

Genetic Diseases

Genetic diseases result from chromosome abnormalities or mutant genes showing a specific pattern of inheritance. In addition, genetic factors are involved in susceptibility to some nongenetic DISEASES.

Article

Farm Silo

Farm silos are storage structures for silages and high-moisture grains used for livestock feeds. Silos are a common fixture in livestock and mixed-farming operations across Canada.

Article

Floras and Botanical Journals

Before 1900 a published "flora" was, loosely defined, a comprehensive, itemized description of the plants of a specific geographical region. Usually more than a mere list, it should have been an analytical description, discussing habitats and distribution and citing previous authorities.

Article

Insect Pests

Insects and humans cohabit the Earth and have developed complex relationships. Insect pests (less than 1% of all species) are those insects that feed on, compete for food with, or transmit diseases to humans and livestock.

Article

Entomology

Entomology is the branch of zoology dealing with the study of insects, although which organisms are included is open to interpretation.

Article

Evolution

Modern understanding of evolution began in 1859 with publication of Charles Darwin's On the Origin of Species by Means of Natural Selection.

Article

Botany History

Long before formal study of plants began in Canadian academic institutions, they were studied by explorers and talented amateurs.

Article

Biogeoclimatic Zone

For example, in British Columbia, the Coastal Western Hemlock Zone is one of 14 biogeoclimatic zones. It occupies high precipitation areas up to 1000 m elevation west of the coastal mountains from the Washington to Alaska borders and beyond.

Article

Biochemistry

Biochemistry, encompasses the study of the chemical nature of living material and of the chemical transformations that occur within it.

Article

Biology

Biological studies of individuals and groups of organisms can occur at various levels (eg, molecular, cellular, anatomical, functional, behavioural, ecological and evolutionary).

Article

Botany

The study of plant life is organized in 3 ways, which are also applicable to zoological material.

Article

Bioethics

The word bioethics is formed from the Greek word for life (bios) and the traditional word for the systematic study of right conduct (ethics).

Article

Food Additives

Consumers normally consider that the term "food additive" refers to almost all substances, primarily chemical in nature, added to foods during production, manufacture, packaging or storage.

Article

Biogeography

Ecology is subdivided into 3 fields of study: autecology (relations of individual species or populations to their milieu), synecology (composition of living communities) and dynecology (processes of change in related communities).

Article

Molluscan Resources

Although Canada's coastline is extensive and contains many diverse molluscan species, the resource is economically relatively small. In 1995 nearly 200 000 t valued at $114.5 million were taken.