General Biology: Definitions and explanations page 12 PDF | Download eBooks
Learn general biology terms with definitions and explanations, biology terminologies (Page 12) for biology degree programs.
- What are Hominins?
Hominins are any species of early human that is more closely related to humans than chimpanzees, ... - What is Organ?
Organ, in biology, a group of tissues in a living organism that have been adapted to ... - What is Tissue?
Tissue is a cellular organizational level between cells and a complete organ. a tissue is an ... - What is Root system?
The root system of a plant constantly provides the stems and leaves with water and dissolved ... - What is Shoot system?
The shoot system includes organs such as leaves, buds, stems, flowers, and fruits and usually it ... - What is Root?
In vascular plants, the root is the organ of a plant that typically lies below the ... - What are Root hairs?
A root hair, or absorbent hair, the rhizoid of a vascular plant, is a tubular outgrowth ... - What is Stem?
A stem is one of two main structural axes of a vascular plant, the other being ... - What are Nodes?
Nodes is simply the place on a plant stem where a leaf is attached. ... - What is Apical bud?
Plants that have apical buds usually have the tendency to grow just the terminal bud on ... - What is Axillary bud?
The axillary bud (or lateral bud) is an embryonic shoot located in the axil of a ... - What is Leaf?
In addition to intercepting light, leaves exchange gases with the atmosphere, dissipate heat, and defend themselves ... - What are Veins?
A vein is a vascular structure which comprises of xylem and phloem cells surrounded by the ... - What is Dermal tissue system?
The dermal tissue is the plants protective layer. like our skin, it forms the first line ... - What is Periderm?
Periderm is a secondary protective covering that forms on small woody stems and many non-woody plants, ... - What is Xylem?
Xylem is one of the two types of transport tissue in vascular plants, phloem being the ... - What is Phloem?
In vascular plants, phloem is the living tissue that transports the soluble organic compounds made during ... - What is Stele?
In a vascular plant, the stele is the central part of the root or stem containing ... - What is Ground tissue system?
The ground tissue of plants includes all tissues that are neither dermal nor vascular. it can ... - What is Pith?
Pith, or medulla, is a tissue in the stems of vascular plants. pith is composed of ... - What is Plant cortex?
A cortex is an outer layer of a stem or root in a plant, lying below ... - What is Differentiation?
Cellular differentiation is the process where a cell changes from one cell type to another. usually, ... - What is Indeterminate growth?
Indeterminate growth is growth that is not terminated in contrast to determinate growth that stops once ... - What are Meristems?
A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones ... - What is Determinate growth?
Determinate growth, simply put, is the one that stops once a genetically pre-determined structure has completely ... - What is Primary growth?
In simple terms, primary growth is the increase in length of the shoot and the root ... - What is Secondary growth?
Secondary growth is the growth that results from cell division in the cambia or lateral meristems ... - What is Vascular cambium?
The vascular cambium is a plant tissue located between the xylem and the phloem in the ... - What is Cork cambium?
Cork cambium is a tissue found in many vascular plants as part of the epidermis. the ... - What is Root cap?
The root cap is a type of tissue at the tip of a plant root. it ... - What is Pericycle?
The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis ... - What is Leaf primordia?
Leaf primordia are small cellular outgrowths, that develop into the leaves. these leaf primordia's occur in ... - What is Apical dominance?
Apical dominance is the phenomenon whereby the main and the thicker central stem of the plant ... - What are Guard cells?
Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are ... - What is Palisade mesophyll?
Palisade cells are plant cells located on the leaves, right below the epidermis and cuticle. they ... - What is Spongy mesophyll?
A layer of cells in the interior of leaves, consisting of loosely arranged, irregularly shaped cells ... - What are Vascular rays?
Vascular rays are a radiate band of parenchyma in the secondary xylem extending into the secondary ... - What is Dendrochronology?
Dendrochronology is basically a tree-ring dating. it is the scientific method of dating tree rings, which ... - What is Bark?
Bark is the outermost layers of stems and roots of woody plants. plants with bark include ... - What is Bundle sheath?
Bundle sheath cells is a layer of cells in plant leaves and stems that forms a ... - What are Lenticels?
A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm ... - What is Development?
Living organisms undergo growth and development. every living organism begins life as a single cell. unicellular ... - What are Preprophase bands?
The preprophase band is a microtubule array found in plant cells that are about to undergo ... - What is Asymmetrical cell division?
A good example of asymmetric cell division is the formation of guard cells that typically involves ... - What is Polarity?
Polarity is a fundamental property of biological systems. polarity is defined as the persistent asymmetrical and ... - What is Pattern formation?
Pattern formation is the developmental process by which cells acquire different identities, depending on their relative ... - What are Lineage based mechanisms?
Many scientific findings suggested that cell fate was restricted early in development and that cells passed ... - What is Phase change?
The phase change in plants is the juvenile-to-adult transition in plants. this transition is distinct from ... - What are Meristem identity genes?
These genes confer floral identity on the peripheral zone cells that give rise to primordia, so ... - What are Organ identity genes?
A great deal of attention has focused on the genes that specify organ identity, leading to ... - What is ABC hypothesis?
The abc model, which aims to describe the biological basis of the process from the perspective ... - What is Phyllotaxy?
Phyllotaxy is the arrangement of leaves on a plant stem. phyllotactic spirals form a distinctive class ... - What is Self pruning?
When a tree sheds a dead branch. this occurs in nature when a tree is in ... - What is Leaf area index?
Leaf area index (lai) is a dimensionless quantity that characterizes plant canopies. it is defined as ... - What is Apoplast?
Inside a plant, the apoplast is the space outside the plasma membrane within which material can ... - What is Symplast?
The symplast of a plant is the inner side of the plasma membrane in which water ... - What is Apoplastic route?
Inside a plant, the apoplast is the space outside the plasma membrane within which material can ... - What is Symplastic route?
The symplast of a plant is the inner side of the plasma membrane in which water ... - What is Transmembrane route?
The transmembrane route is a route where water and solutes use a combination of the apoplastic ... - What is Osmosis?
Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a ...