Glossary

g
Gene - 

A functional hereditary unit that occupies a fixed location on a chromosome and has a specific influence on heredity factors.

Genetic diversity - 

The total variety of hereditary characters found in a breeding populationThe number of a kind of animal that lives in a place. For example, San Francisco has a big seagull population; New York City has a population of several million people.. Generally, the more unrelated animals in a breeding group, the greater will be the genetic diversityThe total variety of hereditary characters found in a breeding population. Generally, the more unrelated animals in a breeding group, the greater will be the genetic diversity and the resulting viability of the herd as a whole. and the resulting viability of the herdA group of animals that travels and feeds together. as a whole.

Genetics - 

The study of heredity; how characteristics are passed from parents to offspring.

Genus - 

A taxonomic concept used to group a number of speciesA group of individuals that have many of the same characteristics, and are different from all other animals in some important way. Hamsters and mice are two different species of rodent. believed to be more closely related to one another than to any others; ranked between family and speciesA group of individuals that have many of the same characteristics, and are different from all other animals in some important way. Hamsters and mice are two different species of rodent..

Gestation period - 

The length of time for carrying the young in the womb. For example, a human has a gestation periodThe length of time for carrying the young in the womb. For example, a human has a gestation period of 9 months, cats and dogs have a gestation period of 63 days. of 9 months, cats and dogs have a gestation periodThe length of time for carrying the young in the womb. For example, a human has a gestation period of 9 months, cats and dogs have a gestation period of 63 days. of 63 days.

Gill - 

A body part that helps an animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. get oxygen from water. Fish and many types of salamanders, newts, and caecilians have gills.

Gizzard - 

An enlargement of the alimentary canal in birds that serves to grind the food before it reaches the stomach.

Global warming - 

An increase in the average temperature of the Earth's atmosphere and oceans over time. This increase can cause changes in the Earth's climate that can affect habitats, and the plants and animals that live in them.

Granivore - 

An animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. that eats grain or seeds.

Grassland - 

An area with grass and very few trees.

Gravid - 

A pregnant animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs..

Graze - 

To eat grasses and other ground-level plants.

Grooming - 

A behaviorIn biology, an organism's activity in response to its environment. The study of animal behavior is called ethology. seen primarily among primatesMembers of the most highly developed order of animals, including humans, monkeys, and apes. in which individuals use their fingers and sometimes their teeth to comb through the fur of another individual. Not only does this activity help to maintain healthy fur and skin, but also promotes friendly communication among individuals, soothes emotions, and helps to establish bonds within the group. Other animals like birds and cats groom themselves as well.

Groundwater - 

Water lying below the Earth's surface in springs and natural reservoirs.

Guard hairs - 

The longer, stiffer hairs that grow up through the shorter, usually woolly hairs of a mammalA warm-blooded animal with a backbone that breathes air, and has at least some hair at some point during its life. The females have glands that produce milk, which they feed to their young.'s coat.