Published: Mon, 27 Feb 2017 11:33:55 +0000
2017-02-27T11:33:55ZWomen have a longer life expectancy than men. A major reason for this is due to differences in genetic make-up between men and women.
2017-02-27T11:33:55ZAnimal cells are eukaryotic cells that contain various membrane-bound organelles.
2017-02-27T11:33:55ZMendel's Law of Segregation states that allele pairs separate during gamete formation, and randomly unite at fertilization.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZPlant and animal cells are similar in that both are eukaryotic cells. However, there are several important differences between these two cell types.
2017-02-27T11:33:55ZDefinition of the term incomplete dominance. Learn how incomplete dominance differs from co-dominance and how they are studied in snapdragon plants.
2017-02-27T11:33:55ZThe cardiac cycle describes the cycle of events that occur when the heart beats. It consists of a diastole phase and a systole phase.
2017-02-27T11:33:55ZThis resource provides information on brain anatomy, brain divisions, cranial nerves, the central nervous system, and brain function.
2017-02-27T11:33:55ZThis 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.
2017-02-27T11:33:55ZThe body contains trillions of cells that come in varying shapes and sizes. Explore some of the different types of cells in the body.
2017-02-27T11:33:55ZLiving organisms are classified into one of six Kingdoms of life. They are placed into these categories based on common characteristics.
2017-02-27T11:33:55ZCellular respiration is a process by which cells harvest the energy stored in food. It includes glycolysis, the citric acid cycle, and electron transport.
2017-02-27T11:33:55ZA 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.
2017-02-27T11:33:55ZGlycolysis is the process of breaking down glucose into two molecules of pyruvate. It produces ATP and is the first stage of cellular respiration.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZThe following 10 facts about cells will provide you with well known and perhaps little known tidbits of information about cells.
2017-02-27T11:33:55ZThe cell nucleus is the command center of our cells. It contains our chromosomes and genetic information needed for the reproduction of life.
2017-02-27T11:33:55ZMendel's law of independent assortment states that allele pairs separate independently during the formation of gametes.
2017-02-27T11:33:55ZAn allele is an alternative form of a gene. Organisms typically have two alleles for a single trait, one being inherited from each parent.
2017-02-27T11:33:55ZRed blood cells are blood components that transport oxygen throughout the body. These cells contain millions of oxygen-binding hemoglobin molecules.
2017-02-27T11:33:55ZBiological evolution is any genetic change in a population inherited over several generations. These changes may be obvious or not very noticeable at all.
2017-02-27T11:33:55ZTake a journey into the cell to find out about the cell structure and classification of both prokaryotic cells and eukaryotic cells.
2017-02-27T11:33:55ZDid you know that cute features such as dimples and freckles are caused by gene mutations? These traits can either be inherited or acquired.
2017-02-27T11:33:55ZConnective tissue supports and binds other tissues of the body. Examples of connective tissue include adipose, cartilage, bone, tendons, and blood.
2017-02-27T11:33:55ZThis guide to the phases of mitosis explores hows cells reproduce. In mitosis, chromosomes are duplicated and divided evenly between two cells.
2017-02-27T11:33:55ZThe Three Domain System is a system for classifying biological organisms. Under this system, organisms are classified into three domains and six kingdoms.
2017-02-27T11:33:55ZProteins are very important molecules in our cells. They are constructed from amino acids and each protein within the body has a specific function.
2017-02-27T11:33:55ZNucleic 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.
2017-02-27T11:33:55ZHeterozygous refers to having different alleles for a gene. Diploid organisms have two alleles for a gene that determine specific traits.
2017-02-27T11:33:55ZA 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.
2017-02-27T11:33:55ZDNA transcription is a process that involves the transcribing of genetic information from DNA to RNA. Genes are transcribed in order to produce proteins.
2017-02-27T11:33:55ZFlowering plants are the most numerous of all the divisions in the Plant Kingdom. Learn about the characteristics and parts of a flowering plant.
2017-02-27T11:33:55ZThe cell wall is the rigid, semi-permeable protective layer found in some cells.
2017-02-27T11:33:55ZThe amygdala is a brain structure responsible for autonomic responses associated with fear and fear conditioning. It processes many of our emotions.
2017-02-27T11:33:55ZThe limbic system is comprised of brain structures that are involved in our emotions. Structures of this system include the amygdala, hippocampus, hypothalamus, and thalamus.
2017-02-27T11:33:55ZCells 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.
2017-02-27T11:33:55ZHomozygous - A Genetics Definition. The term homozygous refers to individuals that have identical alleles for a given trait.
2017-02-27T11:33:55ZHave you ever wondered why you have the same eye color as your parent? Traits are inherited by the transmission of genes from parents to their young.
2017-02-27T11:33:55ZMendel'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.
2017-02-27T11:33:55ZA capillary is an extremely small blood vessel located within the body tissues. Gasses, nutrients, and fluids are exchanged through capillaries.
2017-02-27T11:33:55ZRibosomes are cell organelles that consist of RNA and proteins. They are responsible for assembling the proteins of a cell.
2017-02-27T11:33:55ZAdipose 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.
2017-02-27T11:33:55ZDNA replication is the process of copying the DNA within our cells. This process involves RNA and several enzymes, including DNA polymerase and primase.
2017-02-27T11:33:55ZProkaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. Prokaryotes include bacteria and archaeans.
2017-02-27T11:33:55ZThe peripheral nervous system relays signals between the central nervous system and the other parts of the body through sensory and motor neurons.
2017-02-27T11:33:55ZIf 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.
2017-02-27T11:33:55ZSpecialized plant cells include parenchyma cells, collenchyma cells and sclerenchyma cells. Some cells store nutrients, while others support the plant.
2017-02-27T11:33:55ZThe cerebral cortex lobes include the parietal, frontal, occipital and temporal lobes. They are responsible for processing input from various sources.
2017-02-27T11:33:55ZThe corpus callosum is a thick band of nerve fibers that divides the cerebrum into left and right hemispheres.
2017-02-27T11:33:55ZThe temporal lobes, one of four cerebral cortex lobes, play an important role in organizing sensory input, auditory perception, and memory formation.
2017-02-27T11:33:55ZProtein structure is determined by amino acids sequences. The four protein structure types are primary, secondary, tertiary, and quaternary structure.
2017-02-27T11:33:55ZPhotosynthesis is a process in which light energy is used to produce sugar and other organic compounds. Photosynthesis occurs in plant leaves.
2017-02-27T11:33:55ZThe cerebral cortex is the outer covering of the cerebrum. It is the layer of the brain often referred to as gray matter.
2017-02-27T11:33:55ZThe human body is made up of several organ systems that work together as one unit. These systems are important for proper organism function.
2017-02-27T11:33:55ZDefinition of the term monohybrid cross.
2017-02-27T11:33:55ZHomologous chromosomes are chromosome pairs that are inherited from each parent. They are similar in gene position but may contain different alleles.
2017-02-27T11:33:55ZBroca's area is one of the main areas of the cerebral cortex responsible for producing language. It controls motor functions involved with speech.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZWhat is the relationship between chromosomes and sex? Sex is determined by the presence or absence of certain chromosomes.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZAngiosperms, or flowering plants, are the most numerous of all the divisions in the Plant Kingdom.
2017-02-27T11:33:55ZThe central nervous system is responsible for processing information received from all parts of the body. The main organs are the brain and spinal cord.
2017-02-27T11:33:55ZThe diencephalon, along with the telencephalon comprise the two major divisions of forebrain. The thalamus is a major component of the diencephalon.
2017-02-27T11:33:55ZA dihybrid cross is breeding experiment between organisms that differ in two traits. The parent organisms have different allele pairs for these traits.
2017-02-27T11:33:55ZBone marrow is the soft tissue found inside bones that functions mainly to produce red blood cells, white blood cells, and platelets.
2017-02-27T11:33:55ZBiology 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.
2017-02-27T11:33:55ZA 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.
2017-02-27T11:33:55ZThe thalamus is a limbic system structure that is involved in sensory perception and relaying sensory information to the cerebral cortex.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZSexual reproduction is a process by which two individuals produce offspring with genetic traits from both parents. It involves the union of gametes.
2017-02-27T11:33:55ZSex linked traits originate from genes found on sex chromosomes. Hemophilia is an example of a common sex linked recessive disorder.
2017-02-27T11:33:55ZThe circulatory system circulates blood by pulmonary and systemic circuits. These pathways transport blood between the heart and the rest of the body.
2017-02-27T11:33:55ZThe thymus is a small glandular structure that regulates the immune system through the production of specific immune cells called lymphocytes.
2017-02-27T11:33:55ZFertilization involves the union of male and female sex cells, which results in the production of offspring with a mix of inherited genes.
2017-02-27T11:33:55ZGametes are reproductive cells that unite at fertilization to form a new cell called a zygote. Gametes are haploid cells formed by meiosis.
2017-02-27T11:33:55ZA chloroplast is a chlorophyll containing organelle found in plant cells and some algae. They convert light energy into chemical energy by photosynthesis.
2017-02-27T11:33:55ZThe layers of the heart wall consist of the outer epicardium, the middle myocardium, and the inner endocardium. Cardiac muscle powers heart contractions.
2017-02-27T11:33:55ZThe nucleus is a cell structure that contains hereditary information, or DNA, and controls cellular growth and reproduction.
2017-02-27T11:33:55ZThe following project ideas using plants provide suggestions for topics that can be explored through experimentation.
2017-02-27T11:33:55ZAnalogous 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.
2017-02-27T11:33:55ZSister chromatids are two identical copies of a single replicated chromosome that are connected by a centromere and held together by special proteins.
2017-02-27T11:33:55ZChromatin is a mass of genetic material composed of DNA and proteins that condenses to form chromosomes. Chromatin compresses DNA into a compact unit.
2017-02-27T11:33:55ZWhat is biology? Simply put, it is the study of life. Discover the basic principles of biology and the characteristics of life.
2017-02-27T11:33:55ZA diploid cell is a cell that contains two sets of chromosomes. The somatic cells of the body are diploid cells that reproduce by mitosis.
2017-02-27T11:33:55ZDNA is a type of nucleic acid that contains the genetic information necessary for the production of other cell components and for the reproduction of life.
2017-02-27T11:33:55ZMuscle 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.
2017-02-27T11:33:55ZThe 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.
2017-02-27T11:33:55ZMitochondria are the cell's power producers. They convert energy into forms that are usable by the cell.
2017-02-27T11:33:55ZLipids are diverse compounds that are insoluble in water. They store energy, protect against water loss, and form cell membranes.
2017-02-27T11:33:55ZSex 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.
2017-02-27T11:33:55ZDo 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.
2017-02-27T11:33:55ZThe cytoskeleton is a complex network of fibers that function in cell support and movement. It shapes the cell and holds organelles in place.
2017-02-27T11:33:55ZThe endoplasmic reticulum is a network of tubules and flattened sacs that produce and process lipids and proteins in plant and animal cells.
2017-02-27T11:33:55ZProtein synthesis is accomplished through a process called translation. In translation, RNA and ribosomes work together to produce proteins.
2017-02-27T11:33:55ZSex chromosome abnormalities occur as a result of chromosome mutations brought on by mutagens or problems that occur during meiosis.
2017-02-27T11:33:55ZThe cerebellum is the area of the hindbrain that controls motor movement coordination, balance, equilibrium and muscle tone.
2017-02-27T11:33:55ZThe frontal lobes are one of the four main lobes or regions of the cerebral cortex. They are responsible for the planning of complex cognitive behaviors.
2017-02-27T11:33:55ZThe structure of DNA is that of a double helix. Similar to a spiral staircase, DNA is twisted and coiled so that it can be packed into our cells.
2017-02-27T11:33:55ZThe aorta of the heart is the body's largest artery. It extends from the heart to the abdominal region to supply oxygen rich blood to the body.
2017-02-27T11:33:55ZThe hippocampus is the part of the brain that is involved in memory formation, memory organization, and memory storing. It is a limbic system structure.