Biology Ch5 And 6 Flashcards
(23 cards)
5.1) function of DNA
carries the information for inherited characteristics
5.1) chromosomes
thin threads containing DNA found in the nucleus of all cells
5.1) 23 (single chromosomes)
in humans, the number of chromosomes in the nucleus of each sex cell
5.1) Genotype
the information for the hereditary characteristics in an organism
5.1) phenotype
the external appearance (visible characteristics) of an organism
5.1) 46 (23 pairs)
in humans, the number of chromosomes in the nucleus of each body cell
5.2) gene
part of a chromosome that contains the information for a single hereditary characteristic
5.2) allele
one of the genes of a gene pair (allele pair)
5.2) DNA sequence of a gene
the building blocks of DNA (A, C, T, G) occur in a specific order, one after the other
6.1) ecosystem
a certain area in which the biotic and abiotic factors form a unit
6.1) individual
one single organism
6.1) community
all the populations that live in an ecosystem
6.1) abiotic factors
influences on organisms from non-living aspects of nature
6.1) biotope
the sum of the abiotic factors in an ecosystem
6.1) biotic factors
influences on organisms from living
6.2) decomposers
organisms that break down dead organisms and their waste
6.2) food web
all the feeding relationships in an ecosystem
6.2) food chain
a series of organisms, whereby each subsequent organism is the food source for the next organism
6.2) producers
organisms that provide food for all other organisms
6.2) consumers
organisms that eat the materials made by plants
6.4) pyramid of numbers
shows the number of organisms in each link of a food chain
6.4) biomass
the total weight of all energy-rich compounds
6.4) pyramid of biomass
shows the amount of biomass contained in each level of a food chain
