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26.12: L

Created by: CK-12
lactation
production of milk for an offspring by mammary glands, which occurs in all female mammals after giving birth or laying eggs
lactic acid fermentation
type of anaerobic respiration that includes glycolysis followed by the conversion of pyruvic acid to lactic acid and the formation of NAD+
lancelets
members of the subphylum Cephalochordata
large intestine
organ of the digestive system that removes water from food waste and forms feces
larva (plural, larvae)
juvenile stage that occurs in the life cycle of many invertebrates, fish, and amphibians and that differs in form and function from the adult stage
larynx
organ of the respiratory system between the pharynx and trachea that is also called the voice box because it allows the production of vocal sounds
last universal common ancestor (LUCA)
hypothetical early cell (or group of cells) that gave rise to all subsequent life on Earth
latency
period of dormancy of a virus inside a living body that may last for many years
law of independent assortment
Mendel’s second law stating that factors controlling different characteristics are inherited independently of each other
law of segregation
Mendel’s first law stating that the two factors controlling a characteristics separate and go to different gametes
learning
change in behavior that occurs as a result of experience
leukocyte
white blood cell produced by bone marrow to fight infections
lichen
an organism that results from a mutualistic relationship between a fungus and a cyanobacterium or green alga
life cycle
series of stages a sexually reproducing organism goes through from one generation to the next
ligament
band of fibrous connective tissue that holds bones together
light reactions
first stage of photosynthesis in which light energy from the sun is captured and changed into chemical energy that is stored in ATP and NADPH
lignin
tough, hydrophobic carbohydrate molecule that stiffens and waterproofs vascular tissues of plants
linkage map
map that shows the positions of genes on a chromosome based on the frequency of crossing-over between the genes
linked genes
genes that are located on the same chromosome
Linnaean classification system
system of classifying organisms based on observable physical traits; consists of a hierarchy of taxa, fro the kingdom to the species
lipid
organic compound such as fat or oil
liver
organ of digestion and excretion that secretes bile for lipid digestion and breaks down excess amino acids and toxins in the blood
locus
position of a gene on a chromosome
logistic growth
pattern of population growth in which growth slows and population size levels off as the population approaches the carrying capacity
lung
organ of the respiratory system in which gas exchange takes place between the blood and the atmosphere
luteinizing hormone (LH)
pituitary gland hormone that stimulates the testes to secrete testosterone and the ovaries to secrete estrogen
lymph
fluid that leaks out of capillaries into spaces between cells and circulates in the vessels of the lymphatic system
lymphatic system
system of the body consisting of organs, vessels, nodes, and lymph that produces lymphocytes and filters pathogens from body fluids
lymph node
small structures located on lymphatic vessels where pathogens are filtered from lymph and destroyed by lymphocytes
lymphocyte
type of leukocyte that is a key cell in the immune response to a specific pathogen

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Feb 23, 2012

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Dec 18, 2014
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CK.SCI.ENG.SE.1.Biology.26.12

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