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Departing from traditional textbooks, XBio presents biology as detective work; a bold search for knowledge, and not just its memorization. XBio is a collaboration between and. This program was supported in part by a grant to iBiology from the Howard Hughes Medical Institute. The Bio-Dictionary helps you to understand common terms in biology.
- Phylum Definition
- Examples of Phylum
- Related Biology Terms
- Quiz
Phylum is a taxonomic ranking that comes third in the hierarchy of classification, after domain and kingdom. Organisms in a phylum share a set a characteristics that distinguishes them from organisms in another phylum. The qualities that group animals into a phylum have changed throughout scientific history, as better methods have arisen to determi...
Phylum Chordata
Think of an animal that lives in the zoo. Unless you thought of an octopus or one of the insects in the rainforest pavilion, chances are you thought of an animal in the phylum Chordata. This phylum includes all animals with a notochord, a dorsal hollow nerve chord, and a muscular postanal tail. These three features are seen in every member of this phylum, even humans. Like humans, many animals lose some of these features as they develop. This phylum includes everything from the smallest fish...
Phylum Arthropoda
By far the largest individual phylum, the Arthropoda includes all the segmented animals will hard skeletons that we know as insects and crustaceans. Everything from deep sea crabs to mosquitoes fit in this phylum. The diversity of the arthropods comes from their ability to adapt their hard exoskeleton into almost any shape or function. Because of this, the arthropods have adapted to survive in every environment on the planet.
Phylum Mollusca
This phylum is where the octopus and its relatives are grouped together. The mollusks include all the snails, slugs, clams, mussels, squids and other soft-bodied animals. They often secrete a shell to protect their soft bodies. As the individuals die over time, their shells are shed to the bottom, where they accumulate. Waves push the shells and coral matter onto the beach, where it is repeatedly crushed by the waves. In this way, mollusk shells contribute a large majority of the sand that ex...
Kingdom– The classification group above phyla, which includes organisms of a certain type, like animals.Class– The ranking below phyla, whose members share the characters of the phylum, but are have advanced characters that make them unique.Classification– The process of organizing the life on Earth into a meaningful framework for understanding the relationships between animals.Phylogenetics– Comparing the relationship between animals by comparing many of their traits at once.1. Which group of organisms is most closely related? 1. Phylum Cnidaria, Class Hydrozoa 2. Phylum Arthropoda, Class Insecta 3. Phylum Cnidaria, Class Cubozoa A. 1 and 2 B. 1 and 3 C.2 and 3 2. Some scientists argue against the use of the phylum as a method of classification. Which of the following could be an argument why the phylum is not a good u...
The crinoid Leptometra phalangium (Müller, 1841) forms dense beds (30 individuals m −2, 5.3 ± 3.2 individuals m −2) that cover vast extensions on continental shelfs and shelf edge environments (90–250 m depth) ( Fig. 6.5 C and D) ( Grinyó et al., 2018 ). Leptometra phalangium beds have been associated with elevated densities of ...
Amino acids. Amino acids are the monomers that make up proteins. Specifically, a protein is made up of one or more linear chains of amino acids, each of which is called a polypeptide. (We'll see where this name comes from a little further down the page.) There are 20 types of amino acids commonly found in proteins.
Living things are called organisms. All organisms are made up of cells. Cells are the smallest unit that can carry out all of the functions of life. These functions include taking up nutrients and water, getting rid of waste, getting and using energy, and interacting with the environment. Unicellular organisms are made up of one cell.
- Are all bacterias unicellular or just some?Most bacteria are unicellular. Some species of bacteria build up colonies in which many individual cells unite. Cells within those colonies can sha...
- So I have 2 questions. 1 is last year we learned that atoms are the smallest things but this year we...The cell is the smallest unit of life, and the atom is the smallest unit of a chemical element. Cells are much bigger, and they’re made up of many,...
- How long do cells live? And if they do not live very long how are we alive? And if it is because the...Cells in your body are constantly dying, but also constantly reproducing, so you live a much longer life than your cells. We die not when our cells...
- so i learned that cells can sometimes split called "cell division" but what i wonder is why do they ...There are two types of cell division: mitosis and meiosis. Most of the time, when someone refers to “cell division,” they mean _mitosis_, the proce...
- is a cell smaller than a atom or Atoms the smallest thing everCells are made up of many, many, many atoms, so they are definitely bigger than atoms. Atoms are very small (brooklyn.cuny.edu says “ a row of 10^8...
- Are eggs single cells?Yes, eggs, in a biological sense, are indeed single cells. Eggs in the common term (like chicken eggs) are basically containers that hold that cell...
- what are cell divisionsCell divisions may sound like different groups, but it is a process of a cell splitting into two to make more cells
- If we got cells and our parents got cells and our grandparents got cells and our ancestors got cells...To add on, here is a passage from the University of Washington: "First cells on ancient Earth may have emerged because building blocks of proteins...
- What is that red blood cellthis is a cell, which has protein called hemoglobin, that transports oxygen the lungs to the rest of the body. imagine this, the hemoglobin is a ca...
- How many cells are there in a human body?The average human has about 37.2 trillion cells!
A phylogenetic tree is a diagram that represents evolutionary relationships among organisms. Phylogenetic trees are hypotheses, not definitive facts. The pattern of branching in a phylogenetic tree reflects how species or other groups evolved from a series of common ancestors.
Dec 18, 2016 · This is a list of all biology terms we have at this moment. We are adding more terms!
