Alleles are different forms of the same trait. Let's look at hair color. You can have black hair color or blonde hair color. The allele is the different color hair and the hair is the trait. You get half of the genetic material from the female an half from the male.
Biotic factors are factors that are alive. This means they can grow,reproduce,use energy, and are made of cells. Abiotic factors are not alive. A rock is an abiotic factor, and a dog is classified as biotic.
What makes something alive? All living things are made of cells, have the ability to grow,reproduce, contain genetic material, respond to their surrounding, and use energy. In this video I give examples of each characteristic of living organisms.
During prophase the DNA, found in the nucleus will condense into rod shaped objects called chromosomes. Humans have 23 chromosomes. In the video I discuss sister chromatin, howchromosomes form and more information.
Examples include bones,cartiladge, and blood
On earth objects tend to move from an area of high concentration to an area of low cncentration. This movement from high to low is diffusion. In this video I review several examples of diffusion we encounter in everyday life.
Your genetic code which is referred to as your genotype determines your physical appearance or phenotype.
The Golgi apparatus is part of a transportation and repackaging system found in eukaryotic cells.
Heredity is the passing of traits from one generation to the next.
If you parents have red hair there is a good chance you will have red hair.
Heterotrophs are individuals that cannot create their own energy but must directly or indirectly get their energy from autotrophs.
In an ecosystem you have several types of interactions including, competition,predator and prey, and sybiosis.
The kingdom fungi includes mushrooms and lichen. This kingdom is made up of unicellular and multicellular organisms that are heterotrophs.
The kingdom monera is made up completly of single celled organisms. This kingdom contains bacteria and archaebacteria which are found everywhere on Earth.
Organisms have levels of an organization. Groups of cells create tissues. Groups of tissues create organs, and organs create organisms. Finally, organ systems work together to create an organism.
Life Science is the study of life on earth. It includes genetics, anatomy, ecosystems, biomes, and many more fields of study. In this video I review the entire middle school year of life science in three minutes
The liver is one of the most important organs in your body. It is a factory, a storage area, and manufacturing plant.
Learn interesting and unusual facts about your lungs. Your lungs supply important oxygen to each cell and help remove dangerous carbon dioxide.
Macromolecules are large molecules like proteins, lipids and nucleic acids like DNA
The mitochondria is considered the powerhouse of the cell. It is the site of cellular respiration that creates glucose of the cell in order to give the cell energy.
In this video I review the steps of the nitrogen cycle.
In this video I review another important cycle called the phosphorus cycle.
Physical changes are changes in appearance only. A chemical change creates a new substance with new properties.
Ribosomes are called protein factories. They are very small organelles found in a cell that make proteins.
I create science crossword puzzles almost everyday. Each puzzle has a downloadable pdf and answer key
In this video I review the six major kingdoms. Kingdom anamalia,plant,fungi,bacteria,protist and archaebacteria.
Traits are characteristics that can be passed from one generation to the next. Examples include eye color, face shape, are just two examples.
In this video I review several types of decomposers. They include bacteria, fungi, and insects.
Vacuoles are storage containers of plant and animal cells.
Learn how an earthworm digests the food it eats from start to finish
Learn about four main types of heterotrophs. Carnivores,omivores,herbivores, and saprotrophs