Published: Wed, 18 Jan 2017 11:14:02 +0000
2017-01-18T11:14:02ZThe cell membrane is a thin, semi-permeable barrier that surrounds and encloses the contents of a cell. It supports and helps maintain a cell's shape.
2017-01-18T11:14:02ZAnimal cells are eukaryotic cells that contain various membrane-bound organelles.
2017-01-18T11:14:02ZThis stage-by-stage guide to the phases of meiosis provides details about the events that occur in each of the stages of meiosis I and meiosis II.
2017-01-18T11:14:02ZBiological evolution is any genetic change in a population inherited over several generations. These changes may be obvious or not very noticeable at all.
2017-01-18T11:14:02ZThe cell nucleus is the command center of our cells. It contains our chromosomes and genetic information needed for the reproduction of life.
2017-01-18T11:14:02ZCellular respiration is a process by which cells harvest the energy stored in food. It includes glycolysis, the citric acid cycle, and electron transport.
2017-01-18T11:14:02ZPlant and animal cells are similar in that both are eukaryotic cells. However, there are several important differences between these two cell types.
2017-01-18T11:14:02ZGlycolysis is the process of breaking down glucose into two molecules of pyruvate. It produces ATP and is the first stage of cellular respiration.
2017-01-18T11:14:02ZA 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.
2017-01-18T11:14:02ZDefinition of the term incomplete dominance. Learn how incomplete dominance differs from co-dominance and how they are studied in snapdragon plants.
2017-01-18T11:14:02ZThis resource provides information on brain anatomy, brain divisions, cranial nerves, the central nervous system, and brain function.
2017-01-18T11:14:02ZThe Cell Theory is one of the basic principles of biology. It states that all living things are composed of cells and cells are the basic units of life.
2017-01-18T11:14:02ZTake a journey into the cell to find out about the cell structure and classification of both prokaryotic cells and eukaryotic cells.
2017-01-18T11:14:02ZThis guide to the phases of mitosis explores hows cells reproduce. In mitosis, chromosomes are duplicated and divided evenly between two cells.
2017-01-18T11:14:02ZThe following 10 facts about cells will provide you with well known and perhaps little known tidbits of information about cells.
2017-01-18T11:14:02ZProteins are very important molecules in our cells. They are constructed from amino acids and each protein within the body has a specific function.
2017-01-18T11:14:02ZThe body contains trillions of cells that come in varying shapes and sizes. Explore some of the different types of cells in the body.
2017-01-18T11:14:02ZThe cardiac cycle describes the cycle of events that occur when the heart beats. It consists of a diastole phase and a systole phase.
2017-01-18T11:14:02ZMendel's Law of Segregation states that allele pairs separate during gamete formation, and randomly unite at fertilization.
2017-01-18T11:14:02ZThe cell wall is the rigid, semi-permeable protective layer found in some cells.
2017-01-18T11:14:02ZAn allele is an alternative form of a gene. Organisms typically have two alleles for a single trait, one being inherited from each parent.
2017-01-18T11:14:02ZRibosomes are cell organelles that consist of RNA and proteins. They are responsible for assembling the proteins of a cell.
2017-01-18T11:14:02ZNucleic acids are organic molecules that allow organisms to transfer genetic information from one generation to the next. DNA and RNA are the two types of nucleic acids.
2017-01-18T11:14:02ZDNA transcription is a process that involves the transcribing of genetic information from DNA to RNA. Genes are transcribed in order to produce proteins.
2017-01-18T11:14:02ZThe peripheral nervous system relays signals between the central nervous system and the other parts of the body through sensory and motor neurons.
2017-01-18T11:14:02ZThe amygdala is a brain structure responsible for autonomic responses associated with fear and fear conditioning. It processes many of our emotions.
2017-01-18T11:14:02ZCells divide either through the process of mitosis or meiosis. Sex cells are produced through meiosis, while all other body cell types are produced through mitosis.
2017-01-18T11:14:02ZDNA replication is the process of copying the DNA within our cells. This process involves RNA and several enzymes, including DNA polymerase and primase.
2017-01-18T11:14:02ZA 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.
2017-01-18T11:14:02ZThe limbic system is comprised of brain structures that are involved in our emotions. Structures of this system include the amygdala, hippocampus, hypothalamus, and thalamus.
2017-01-18T11:14:02ZLiving organisms are classified into one of six Kingdoms of life. They are placed into these categories based on common characteristics.
2017-01-18T11:14:02ZConnective tissue supports and binds other tissues of the body. Examples of connective tissue include adipose, cartilage, bone, tendons, and blood.
2017-01-18T11:14:02ZRed blood cells are blood components that transport oxygen throughout the body. These cells contain millions of oxygen-binding hemoglobin molecules.
2017-01-18T11:14:02ZThe cerebral cortex lobes include the parietal, frontal, occipital and temporal lobes. They are responsible for processing input from various sources.
2017-01-18T11:14:02ZPhotosynthesis is a process in which light energy is used to produce sugar and other organic compounds. Photosynthesis occurs in plant leaves.
2017-01-18T11:14:02ZAdipose tissue is a type of connective tissue composed of fat storing cells that harvest and utilize the energy in fats. White adipose tissue stores energy and helps to insulate the body, while brown adipose and beige adipose burn energy and generate heat.
2017-01-18T11:14:02ZSpecialized plant cells include parenchyma cells, collenchyma cells and sclerenchyma cells. Some cells store nutrients, while others support the plant.
2017-01-18T11:14:02ZThe human body is made up of several organ systems that work together as one unit. These systems are important for proper organism function.
2017-01-18T11:14:02ZHomologous chromosomes are chromosome pairs that are inherited from each parent. They are similar in gene position but may contain different alleles.
2017-01-18T11:14:02ZProkaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. Prokaryotes include bacteria and archaeans.
2017-01-18T11:14:02ZWhat is biology? Simply put, it is the study of life. Discover the basic principles of biology and the characteristics of life.
2017-01-18T11:14:02ZThe central nervous system is responsible for processing information received from all parts of the body. The main organs are the brain and spinal cord.
2017-01-18T11:14:02ZProtein structure is determined by amino acids sequences. The four protein structure types are primary, secondary, tertiary, and quaternary structure.
2017-01-18T11:14:02ZMendel's law of independent assortment states that allele pairs separate independently during the formation of gametes.
2017-01-18T11:14:02ZMendel'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.
2017-01-18T11:14:02ZWhat is the relationship between chromosomes and sex? Sex is determined by the presence or absence of certain chromosomes.
2017-01-18T11:14:02ZThe cerebral cortex is the outer covering of the cerebrum. It is the layer of the brain often referred to as gray matter.
2017-01-18T11:14:02ZThe brain is one of the largest and most important organs of the human body. It sends messages to and receives messages from all over the body.
2017-01-18T11:14:02ZDo you know what the cytoskeleton does? This cell biology glossary is a good resource for finding succinct, practical, and meaningful biology definitions for various cell biology terms.
2017-01-18T11:14:02ZDefinition of the term monohybrid cross.
2017-01-18T11:14:02ZSpontaneous generation is the idea that living organisms can arise from nonliving substances. This idea was disproved through scientific experimentation.
2017-01-18T11:14:02ZA capillary is an extremely small blood vessel located within the body tissues. Gasses, nutrients, and fluids are exchanged through capillaries.
2017-01-18T11:14:02ZA chloroplast is a chlorophyll containing organelle found in plant cells and some algae. They convert light energy into chemical energy by photosynthesis.
2017-01-18T11:14:02ZThe corpus callosum is a thick band of nerve fibers that divides the cerebrum into left and right hemispheres.
2017-01-18T11:14:02ZThe Three Domain System is a system for classifying biological organisms. Under this system, organisms are classified into three domains and six kingdoms.
2017-01-18T11:14:02ZBlood is the life fluid of the body as it provides nourishment to the cells, tissues, and organs of the body. A component of the cardiovascular system, blood is circulated via the heart and blood vessels.
2017-01-18T11:14:02ZThe thymus is a small glandular structure that regulates the immune system through the production of specific immune cells called lymphocytes.
2017-01-18T11:14:02ZMitochondria are the cell's power producers. They convert energy into forms that are usable by the cell.
2017-01-18T11:14:02ZThe endoplasmic reticulum is a network of tubules and flattened sacs that produce and process lipids and proteins in plant and animal cells.
2017-01-18T11:14:02ZThe integumentary system consists of the largest organ in the body, the skin. This organ protects the internal structures of the body from damage.
2017-01-18T11:14:02ZChromatin is a mass of genetic material composed of DNA and proteins that condenses to form chromosomes. Chromatin compresses DNA into a compact unit.
2017-01-18T11:14:02ZBroca's area is one of the main areas of the cerebral cortex responsible for producing language. It controls motor functions involved with speech.
2017-01-18T11:14:02ZThe scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world.
2017-01-18T11:14:02ZSnakes are unique reptiles that most try to avoid. Some have unusual features that are flat out strange. Discover 7 weird facts about snakes.
2017-01-18T11:14:02ZProtein synthesis is accomplished through a process called translation. In translation, RNA and ribosomes work together to produce proteins.
2017-01-18T11:14:02ZThe pineal gland is a small gland of the endocrine system that produces the hormone melatonin. This gland controls sleep-wake cycles.
2017-01-18T11:14:02ZThis mitosis glossary is a good resource for finding succinct, practical, and meaningful biology definitions for common mitosis terms.
2017-01-18T11:14:02ZThe diencephalon, along with the telencephalon comprise the two major divisions of forebrain. The thalamus is a major component of the diencephalon.
2017-01-18T11:14:02ZThe 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 the heart.
2017-01-18T11:14:02ZMuscle tissue is the most abundant tissue type in most animals. The three types of muscle tissue in the body are cardiac, smooth, and skeletal muscle.
2017-01-18T11:14:02ZAnalogous to the body's internal organs, organelles are tiny cellular organs that are specialized to perform functions necessary for normal cellular operation. Examples of organelles include the nucleus, mitochondria, and ribosomes.
2017-01-18T11:14:02ZBone marrow is the soft tissue found inside bones that functions mainly to produce red blood cells, white blood cells, and platelets.
2017-01-18T11:14:02ZLipids are diverse compounds that are insoluble in water. They store energy, protect against water loss, and form cell membranes.
2017-01-18T11:14:02ZSex cells are reproductive cells or gametes. Female ova are large and round, while male sperm are long and motile. Sex cells are formed by meiosis.
2017-01-18T11:14:02ZNormal cells differ from cancer cells in a number of important areas. Mainly, cancer cells acquire the ability to proliferate uncontrollably.
2017-01-18T11:14:02ZThis study guide introduces you to the basics of mitosis and the mitotic process.
2017-01-18T11:14:02ZA diploid cell is a cell that contains two sets of chromosomes. The somatic cells of the body are diploid cells that reproduce by mitosis.
2017-01-18T11:14:02ZThe nucleus is a cell structure that contains hereditary information, or DNA, and controls cellular growth and reproduction.
2017-01-18T11:14:02ZBiology games and quizzes help you to test your knowledge of biology in a fun way. Discover how much you know about the human body, genetics, and more.
2017-01-18T11:14:02ZHomozygous - A Genetics Definition. The term homozygous refers to individuals that have identical alleles for a given trait.
2017-01-18T11:14:02ZWashing and drying your hands properly is a simple and effective way to remove bacteria and other dangerous germs and to prevent the spread of disease.
2017-01-18T11:14:02ZIf you are taking a biology course, you are going to write biology lab reports. Learn how to use a good lab report format to properly write a lab report.
2017-01-18T11:14:02ZSexual reproduction is a process by which two individuals produce offspring with genetic traits from both parents. It involves the union of gametes.
2017-01-18T11:14:02ZIn order for virus replication to occur, a virus must infect a cell and use the cell's organelles to generate new virus particles.
2017-01-18T11:14:02ZThe following project ideas using plants provide suggestions for topics that can be explored through experimentation.
2017-01-18T11:14:02ZA 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.
2017-01-18T11:14:02ZThe circulatory system circulates blood by pulmonary and systemic circuits. These pathways transport blood between the heart and the rest of the body.
2017-01-18T11:14:02ZThe 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.
2017-01-18T11:14:02ZBiomes are identified by the vegetation and animals that populate them. The location of each biome is determined by the regional climate.
2017-01-18T11:14:02ZThe cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell, enclosing its contents. It protects and supports the cell.
2017-01-18T11:14:02ZThe cytoplasm is a clear substance that consists of all of the contents outside of the nucleus of a membrane bound cell.
2017-01-18T11:14:02ZHeterozygous refers to having different alleles for a gene. Diploid organisms have two alleles for a gene that determine specific traits.
2017-01-18T11:14:02ZGametes are reproductive cells that unite at fertilization to form a new cell called a zygote. Gametes are haploid cells formed by meiosis.
2017-01-18T11:14:02ZTemperate grasslands are savanna-like areas located in cold climate regions. Learn about the animals and plants in this biome.
2017-01-18T11:14:02ZSex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens or problems that occur during meiosis.
2017-01-18T11:14:02ZAsexual reproduction involves producing progeny that are genetic clones of the parent. This can be done by regeneration, budding, and binary fission.
2017-01-18T11:14:02ZThe cerebellum is the area of the hindbrain that controls motor movement coordination, balance, equilibrium and muscle tone.
2017-01-18T11:14:02ZThe layers of the heart wall consist of the outer epicardium, the middle myocardium, and the inner endocardium. Cardiac muscle powers heart contractions.
2017-01-18T11:14:02ZLymph nodes are specialized structures in the body that filter lymph fluid of harmful pathogens, cancer cells, and cellular waste.
2017-01-18T11:14:02ZSavannas are areas of open grassland with dispersed trees. Learn about the animals and vegetation of the savanna biome.