Classification of Organisms
dichotomous key
What is the tool scientist use to identify living things?
What is the thin flexible boundary surrounding the cell?
cell membrane
What is a double stranded structure of a molecule found in the chromosomes of cells which carry the information necessary to duplicate the organism?
DNA
The skin is a major organ in which system?
integumentary system
______________________________contains many different kinds of fossils.
sedimentary rock
What is variation among living organisms?
biodiversity
What do plant cells have that animal cells do not?
Cell wall or chloroplast
What is the tool used to express the possible outcomes of a trait?
Punnett square
The lungs, trachea, and the nose make up which system?
respiratory system
What is the study of an organism’s early development called?
embryology
What is one celled organisms with no nucleus?
prokaryotes
What is the part of the cell that contains DNA?
the nucleus
If an individual inherits one dominant allele and one recessive allele, the genotype is homozygous or heterozygous?
heterozygous
In the nervous system, __________________ is the bundle of nerve cells that are responsible for carrying information from one place to another.
neurons
Which model of evolution shows change over a relatively short period of time?
punctuated equilibrium
Who is a Swedish botanist that devised the current system for classifying organisms?
Carl Linnaeus
What is the jelly-like substance in the cell around the nucleus and organelles?
cytoplasm
What is the situation called where one trait is not completely dominant over the other? (for example skin color)
incomplete dominance
What two systems work together to allow the human body to move?
skeletal and muscular
What do the appendix and wisdom teeth of adult humans have in common with the wings of an ostrich?
they are vestigial structures
What is a two-part name that identifies the genus and species?
scientific name
What is the rod shaped double membranous structures where cellular respiration takes place?
mitochondria
A scientist crossed a purebred long-winged male fruit fly with a purebred short-winged fruit fly. Long wings are dominant over short wings. What is the probability that the offspring will have long wings?
100%
What is the special, flat muscle that runs across the body cavity, that contracts each time you breath? (no it's not your ribs moving)
diaphragm
A population of mosquitoes is sprayed with a new insecticide. Most of the mosquitoes are killed but a few survive. In the next generation, the spraying continues, but still more mosquitoes hatch that are unaffected by the insecticide. What best explains these results?
The insecticide caused the mosquitoes to develop an immune response that was inherited.