Science grade 8 4th quarter test

is the study of relationships between things

Ecology

The scientist who first studied conditioned reflexes was

Ivan Pavlov

The source of almost all of the energy in living things is the

Sun

Sperm and egg cells are special because they only have half the number of chromosomes. When does the normal number of chromosomes form as a new life begins

at fertilazation

What was the stimulus used in the experiments referred to in question #11?

bells

The earth's surface is divided into six very large ecosystems called

biomes

Regular cell division in which two new cells are formed, both with a complete set of chromosomes is called

conjugation

Since brown eyes cover the trait for blue eyes, brown eyes are said to be

dominate

primary consumers eat

eat green plants/

Which term is used to describe many food chains all linked together

ecosystem

sexual reproduction is important because it allows a new combination of

genetics and cells

The name of the Catholic monk who discovered the basic laws of genetics is

gregor mendel

The study of how traits are passed on from one generation to another is called _______

heredity

A person with the trait for both brown and blue eyes is said to be

hybrid

secondary consumers eat

ingest primary consumers

A series of built-in actions directed toward a specific end is called

instincts

_____the highest type of thought, is using to solve a totally new problem.

learning

What do legumes help to put back into the soil

nitrogen

In nature decomposers recycle _______ and ______

nutrients elements

After the Civil War, George Washington Carver tried to convince Southern farmers to grow

peanuts

nutrients in nature must be

recycled

Which game is based on conditioned reflexes to eliminate players?

simon says

a ______reflex is a quick response to a stimulus that involves the brain.

unconditioned reflex