Artificial and Natural selection

types of selection

Natural Selection

Zebra Stripes

Webbed feet

Camel humps

Artificial Selection

Dog breeds

Plants

Papayas

classifications of matter

mass

volume

density

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Physical Property-The change in state or appearance of an object.

Chemical Property- A change that becomes evident mostly after the reaction has occurred.

Changes to Matter

Physical changes EX. cutting apple, tear a piece of paper, chopping down a tree.

Phase Changes-When a substance takes a different form. EX. solid to liquid.

Atom-the smallest compound that has the chemical properties of an element.

Molecule-a group of atoms bonded together.

Element- EX. carbon, hydrogen, iron

Mixture EX. Air, mud puddles, beach sand

Element- EX. carbon, hydrogen, iron

Genetics

Artificial Selection- The breeding of two specific animals to get desirable traits.

Phenotype- The physical appearance of an organism.

Genotype- The genetic makeup of an organism.

Heredity- The passing of characteristics from parent to offspring.

Types of Reproduction

Asexual Reproduction

Sexual Reproduction

Advantages-Takes less time and energy

Disadvantages- All offspring look the same

Advantages- All offspring look different

Disadvantages- Takes up more time and energy than asexual reproduction

Genome

A full set of chromosomes, all the inheritable traits of an organism.

Chromosomes

Any of several thread like bodies, 23 are found in humans.

DNA

A basic unit of heredity