Terms in this set (50)
An action by an organism or part of an organism causing a change in position or place.
The chemical reactions that break down nutrient molecules in living cells to release energy.
The ability to detect or sense changes in the environment and to make responses.
The permanent increase in size or dry mass by an increase in cell size, or number, or both.
The process that makes more of the same kind of organism.
The removal from organisms of toxic waste, the waste products of metabolism and substances in excess to requirements.
The taking in of nutrients which are organic substances or mineral ions, containing raw materials, or energy for growth and tissue repair, absorbing and assimilating them.
The break down of food molecules into small water soluble molecules using mechanical and chemical processes.
A protein that functions as a biological catalyst.
The passing out of undigested food as faeces, through the anus.
Taking in substances into the body through the mouth.
The fundamental process by which plants manufacture carbohydrates from raw materials using energy from light.
The movement of digested food molecules though the wall of the small intestine into the blood.
The evaporation of water from the surfaces of mesophyll cells followed by a loss of water vapour from plant leaves through stomata.
The movement of sucrose and amino acids in phloem, from regions of production to regions of storage or utilisation in respiration and growth.
The release of a relatively large amount of energy in cells by the break down of food substances in the presence of oxygen.
The release of relatively small amounts of energy by the breakdown of food substance in the absence of oxygen.
A chemical substance made in a gland, carried by the blood, which alters the activity of one or more specific target organs and is then destroyed by the liver.
The response made by part of a plant in which it grows towards or away from gravity.
The response made by part of a plant, by which it grow towards or away from the direction of light.
The maintenance of a constant internal environment.
The process that involves the fusion of haploid nuclei to form a diploid zygote and the production of genetically dissimilar offspring.
The process resulting in genetically identical offspring from one parent.
The transfer of pollen from the male part of the plant (anther of stamen) to the female part (the stigma).
The transmission of genetic information from generation to generation.
A thread of DNA made up of a string of genes.
A length of DNA that is a unit of heredity and codes for a specific protein. a gene may be copied and passed onto the next generation.
Any two or more alternative forms for a gene.
A nucleus containing only a single set of unpaired chromosomes.
A nucleus containing two sets of chromosomes, one from each parent.
A nuclear division giving rise to identical cells in which the chromosome number is maintained by the exact duplication of chromosomes.
A reduction division in which the chromosome number is halved from diploid to haploid.
The genetic make up of organism in terms of the alleles present.
The physical or other features of an organism due to both its genotype and its environment.
Having two identical alleles of a particular gene. Two identical homozygous individuals that breed together will be pure breeding.
Having two different alleles of a particular gene and will not be pure breeding.
An allele that is expressed when present.
An allele that is only expressed if there is no dominant allele of that gene present.
A change in a gene or chromosome.
The greater chance of passing on of genes by the best adapted organisms.
A chart showing the flow of energy from one organism to the next, beginning with a producer.
A network of interconnected food chains showing the energy flow through part of an ecosystem.
A unit containing all of the organisms and their environment interacting together, in a given area.
The position in a food chain occupied by an organism.
An organism that gets its energy from dead or waste organic matter.
An organism that makes its own organic nutrients, usually using energy from sunlight through photosynthesis.
An organism that gets its energy from feeding on other organisms.
The diffusion of water molecules from their region of higher concentration to a region of their lower concentration through a partially permeable membrane.
The net movement of molecules from their region of higher concentration to a region of their lower concentration, down a concentration gradient as a result of their random movement.
The place where an organism lives to obtain its food and reproduces.