Biology: Most Popular Articles
Mendel's law of independent assortment states that allele pairs separate independently during the formation of gametes.
Mendel's Law of Segregation states that allele pairs separate during gamete formation, and randomly unite at fertilization.
In glycolysis, glucose is split into two molecules of a three-carbon sugar.
Mendel's law of independent assortment states that allele pairs separate independently during the formation of gametes. Therefore, traits are transmitted to offspring independently of one another.
The nervous system is comprised of the central nervous system and the peripheral nervous system. The central nervous system is responsible for processing information received from the peripheral nervous system.
The Three Domain System is a system for classifying biological organisms. Under this system, organisms are classified into three domains and six kingdoms.
Definition of the term incomplete dominance.
Living organisms are classified into three Domains and into one of six Kingdoms of life.
Proteins are very important molecules in our cells. Each protein within the body has a specific function.
An allele is an alternative form of a gene.
The nervous system can be divided into two parts, the central nervous system and the peripheral nervous system.
The pineal gland is a pine cone shaped gland of the endocrine system that produces several important hormones including melatonin.
This stage-by-stage guide to the phases of meiosis provides details about the events that occur in each of the stages of meiosis.
DNA transcription is a process that involves the transcribing of genetic information from DNA to RNA.
About the size of a pearl, the hypothalamus directs a multitude of important functions in the body. It is the control center for many autonomic functions and also regulates endocrine system hormones.
The human body is made up of several organ systems that work together as one unit.
Cellular respiration is a process by which cells harvest the energy stored in food. Glycolysis, the citric acid cycle, and electron transport are the three main processes of cellular respiration.
Due to its intricate structure and function, the anatomy of the brain is complex. This resource provides information on brain anatomy, the central nervous system, and brain function.
The cerebellum is the area of the hindbrain that controls motor movement coordination, balance, equilibrium and muscle tone.
What is the relationship between chromosomes and sex? Sex is determined by the presence or absence of certain chromosomes.
The medulla oblongata is a portion of the hindbrain that controls autonomic functions such as breathing, digestion and heart rate.
Photosynthesis is a process in which light energy is used to produce sugar and other organic compounds.
Protein synthesis is accomplished through a process called translation. In translation, RNA and ribosomes work together to produce proteins.
The corpus callosum is a thick band of nerve fibers that divides the cerebrum into left and right hemispheres.
Mitochondria are the cell's power producers. They convert energy into forms that are usable by the cell.
The cell membrane is a thin semi-permeable membrane that surrounds the cell's cytoplasm, enclosing its contents.
The frontal lobes are one of the four main lobes or regions of the cerebral cortex.
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Animal cells are eukaryotic cells that contain various membrane-bound organelles.
The principles that govern heredity were discovered by a monk named Gregor Mendel in the 1860's. One of these principles is now called Mendel's law of segregation.
The hippocampus is the part of the brain that is involved in memory forming, organizing, and storing. It is a limbic system structure that is particularly important in forming new memories and connecting emotions and senses, such as smell and sound, to memories.
The cardiac cycle is the cycle of events that occurs as the heart contracts.
Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. Prokaryotes include bacteria and archaeans.
The limbic system is responsible for controlling various functions in the body. Structures of this system include the hippocampus, hypothalamus, and thalamus.
A stage-by-stage guide to the phases of mitosis.
The amygdala is an almond shaped mass of nuclei located deep within the temporal lobe of the brain.
The thalamus is a large, dual lobed mass of grey matter buried under the cerebral cortex. It is involved in sensory perception and regulation of motor functions.
The cerebrum is the largest portion of the brain. It encompasses about two-thirds of the brain mass and lies over and around most of the structures of the brain.
An introduction to the mechanisms of sexual reproduction in animals.
The cerebral cortex is the layer of the brain often referred to as gray matter. It is the outer portion of the cerebrum.
The following 10 facts about cells will provide you with well known and perhaps little known tidbits of information about cells.
The cardiac cycle is the sequence of events that occurs when the heart beats.
Sex linked traits originate from genes found on sex chromosomes. Hemophilia is an example of a common sex linked disorder that is an X linked recessive trait.
The pons serves as a communications and coordination center between the two hemispheres of the brain.
An introduction to the mechanisms of asexual reproduction in animals. Common forms of this type of reproduction include budding, gemmules, fragmentation, regeneration, and parthenogenesis.
The pituitary gland is a small endocrine system organ that controls a multitude of important functions in the body.
The brainstem is the region of the brain that connects the cerebrum with the spinal cord. It consists of the midbrain, medulla oblongata, and the pons.
A gene mutation is any change that occurs in the DNA. These changes can be beneficial to, have some effect on, or be seriously detrimental to an organism.
The endoplasmic reticulum is a network of tubules and flattened sacs that serve a variety of functions in the cell.
Information and resources pertaining to the parietal lobes
The temporal lobes are one of the four main lobes or regions of the cerebral cortex. The temporal lobes play an important role in organizing sensory input, auditory perception and memory.
Bacterial reproduction most commonly occurs by a kind of cell division called binary fission. Other forms of bacterial reproduction include conjugation, transformation, and transduction.
Definition of Mendel's law of independent assortment.
A plant cell is a eukaryotic cell, meaning that it possesses a membrane-bound nucleus. Learn about the structures and organelles that can be found in typical plant cells.
The presence or absence of certain identifiers on the surface of red blood cells determine human blood type.
A chromosome mutation causes changes in the structure or number of chromosomes in a cell. These mutations are often caused by errors that occur during the process of cell division or by mutagens.
Take a journey into the cell to find out about the cell structure of both prokaryotic cells and eukaryotic cells.
The cerebral cortex is the outer covering of the cerebrum. It is the layer of the brain often referred to as gray matter.
Protein structure is determined by the sequence of amino acids that form a protein. The four protein structure levels are primary, secondary, tertiary, and quaternary structure.
Ribosomes are cell organelles that consist of RNA and proteins. They are responsible for assembling the proteins of the cell.
The occipital lobes are positioned at the back region of the cerebral cortex and are the main centers for visual processing.
Here are some great ideas for biology science fair projects including projects related to animals, plants and the human body.
The circulatory system involves the circulation of blood which serves to move blood to a site or sites where it can be oxygenated, and where wastes can be disposed.
The heart is the organ that helps supply blood and oxygen to all parts of the body. Heart anatomy focuses on the structure and function of this amazing organ.
Broca's area is one of the main areas of the cerebral cortex responsible for producing language.
Definition of the word heterozygous.
A diploid cell is a cell that contains two sets of chromosomes.
Also called leukocytes, white blood cells play an important role in the immune system by protecting the body from infectious agents.
Homeostasis is the ability to maintain a constant internal environment in response to environmental changes.
Learn about the characteristics and parts of a flowering plant.
The Cell Theory is one of the basic principles of biology. It states that all living things are composed of cells.
If you are taking a biology course, you are going to write biology lab reports. Find information about using a good lab report format to properly write a lab report.
The ventricles of the heart function to pump blood to the entire body.
A haploid cell is a cell that contains one complete set of chromosomes.
The heart is the organ that supplies blood and oxygen to all parts of the body.
Should you wash your hands with a hand sanitizer or soap and water?
What is biology? Simply put, it is the study of life.
Explore the structure and function of animal tissues, including connective tissue.
Learn about virus replication and how viruses infect cells.
A capillary is an extremely small blood vessel located within the tissues of the body.
Information and resources pertaining to the coronary arteries of the heart.
cellular respiration, quiz
Information on bile secretion and digestion.: bile acids fat soluble vitamins bile ducts small intestine organic molecules
The cardiovascular system is responsible for transporting nutrients and removing gaseous waste from the body. This system is comprised of the heart and the circulatory system.
Here are some excellent tips to help you learn how to study for biology exams.
anatomy quiz, heart anatomy
The skeletal system is the support system for the body. It gives the body shape, form, and mobility while providing protection for sensitive organs.
Information and resources pertaining to the pericardium of the human heart.
Lymphatic system structures collect, filter, and return lymph to blood circulation.
Gametes are reproductive cells. These cells unite to form a new cell called a zygote.
Red blood cells are blood components that transport oxygen throughout the body. Also called erythrocytes, these cells contain hundreds of millions of oxygen-binding hemoglobin molecules.
In sexual reproduction, fertilization involves the donation of genes from two parents which results in the production of offspring with a mix of inherited genes.
The cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell, enclosing its contents.
Sex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens or problems that occur during meiosis.
Biological evolution is defined as any genetic change in a population that is inherited over several generations.
The integumentary system consists of the largest organ in the body, the skin. This extraordinary organ system protects the internal structures of the body from damage, prevents dehydration, stores fat and produces vitamins and hormones.
The diencephalon, along with the telencephalon comprise the two major divisions of forebrain.
Blood vessels are intricate networks of hollow tubes that transport blood throughout the entire body.
Information and resources pertaining to the human heart valves.
Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins. Page 2.
Need help studying for biology? I've got some great biology study tips for you.
Lymphocytes are a type of white blood cell that provide a means for specific and nonspecific immunity against antigens.
Definition of the word homozygous.
Nucleic acids allow organisms to transfer genetic information from one generation to the next.
Try this simple demonstration that shows how to make a working lung model.
Temperate forests are areas with high levels of precipitation, humidity, and contain a variety of deciduous trees.
The thymus is a small glandular structure that regulates the immune system through the production of specific immune cells called lymphocytes.
Information and resources pertaining to the human digestive system and nurtrient absorption.
For almost one hundred years scientists believed that brain cells don't regenerate, until now.
Information and resources pertaining to the pulmonary artery of the heart.
Before sitting down to enjoy that holiday turkey meal, I believe it is appropriate to pay tribute to this splendid bird by discovering some interesting turkey facts.
Information and resources pertaining to the aorta of the heart.
Drinking too much alcohol can lead to alcohol hangover. Learn about alcohol hangover symptoms and how to prevent hangover.
Plant tissue systems are composed of dermal tissue, vascular tissue, and ground tissue systems. These systems provide support, nutrient formation and transportation, growth, and protection for a plant.
The atria of the heart receive blood returning to the heart from other areas of the body.
Blood is the life fluid of the body as it provides nourishment to the cells, tissues, and organs of the body.
Information and resources pertaining to the basal ganglia
Information on the metabolic functions of the liver including information on carbohydrate, fat and protein metabolism.
Information and resources pertaining to the sinoatrial node of the heart.
There have a number of important specialized types of plant cells. Some examples of specialized plant cells include parenchyma cells, collenchyma cells and sclerenchyma cells.
Information on gastric secretions including hormones, mucus and acid.
The carotid arteries are blood vessels that supply blood to the head, neck and brain.
Definition of the term dihybrid cross.
How do normal cells differ from cancer cells? Learn about the properties of normal cells versus cancer cells.
In genetic variation, the alleles of organisms within a population change.
Sex cells are male and female reproductive cells. They are produced through the cell division process of meiosis.
Explore the structure and function of cardiac, smooth, and skeletal muscle tissue.
Learn about the four steps of cardiac conduction, the rate at which the heart conducts electrical impulses.
Lipids are very diverse in both their respective structures and functions. Examples of lipids include fats, phospholipids, steroids and waxes.
Become familiar with how steroid hormones work in the body to produce proteins.
A chromosome is a long, stringy aggregate of genes that carries heredity information and is formed from condensed chromatin.
All cells of the nervous system are comprised of neurons. Neurons are responsible for sending, receiving, and interpreting information from all parts of the body.
Lymphatic vessels filter and transport fluid away from tissues before returning it to the blood. This helps to maintain normal blood volume and pressure.
The nucleus is a cell structure that contains hereditary information, or DNA, and controls cellular growth and reproduction.
Taxonomy is a hierarchical system for classifying and identifying organisms.
Explore the structure and function of nervous tissue and neurons, also called nerve cells.
Information and resources pertaining to the reticular formation
Information and resources pertaining to the atrioventricular node of the heart.
A vein is an elastic blood vessel that transports blood from various regions of the body to the heart. Veins can be categorized into pulmonary, systemic, superficial, and deep veins.
This study guide introduces you to the basics of mitosis and the mitotic process.
Information on the esophogus and its role in digestion.
Find information on salivary glands, saliva, mucus and their function in digestion.
Definition of the term monohybrid cross.
An artery is an elastic blood vessel that transports blood away from the heart. Pulmonary and systemic arteries are two main types of arteries.
Get answers to frequently asked biology related questions.
Phospholipids belong to the lipid family of biological polymers. A phospholipid is composed of two fatty acids, a glycerol unit, a phosphate group and a polar molecule.
Information and resources pertaining to the tricuspid valve of the heart.