| what does infertile mean | cannot produce an offspring |
| what is taxonomy | the study of classifications |
| organisms are classified based on two things | 1physical appearance (morphology and anatomy), 2molecular evidence. |
| what is morphology | form/ general shape |
| what is anatomy | detailed structure; internal structure; structure of bones |
| what is molecular evidence | similarity in DNA |
| what are the three domains | eukaryote, bacteria, archaea |
| what are the characteristics of living things | movement, nutrition, respiration, excretion, growth, reproduction, sensitivity |
| what is the binomial system | the system of naming an organism a scientific name |
| what are the two things that make up a species | 1 similarity in traits, 2 ability to produce a fertile offspring |
| what is stimuli | change in the environment that organisms respond to |
| types of stimuli | temperature, chemicals in the atmosphere, changes in light |
| what are heterotrophs | organisms that consume food |
| what are autptrophs | organisms that make their own food |
| what are the levels of classification | domain, kingdom, phylum, class, order, family, genus, species |
| what are the three domains | eukarya, archaea, bacteria |
| every cellhas... | cytoplasm, cell membrane, dna, ribosomes |
| what is the function of ribosomes | they make protein |
| whats the difference between the three domains | eukarya have a nucleus unlike archaea and bacteria, archaea and bacteria can both have cell walls, but their cell walls have different structures |
| what are eukaryotes | cells that have a nucleus |
| what are prokaryotes | cells that have no nucleus |
| what is a species | a group of organisms that share similar traits or characteristics and can breed to produce a fertile offspring |
| naming species by the binomial system | first name: genus
second name: species |
| what is classification | to put organisms in groups of catagories based on their traits |
| what are the four kingdoms | protests, animals, plants, fungi |
| what are animals | heterotrophs- multi cellular |
| what are fungi | decomposers- uni or multi cellular |
| what are decomposers | organisms that break down food using digestive enzymes to get energy from it |
| what are the main phyla of animals | chordata, annelids, arthropods |
| what are chordates | animals that have backbones |
| what are arthropods | animals which have joint legs and an exsoskeleton |
| what are annelids | segmented worms, no legs |
| classes of the phylum chordata | fish, amphibians, reptiles, birds, mammals |
| what are molluscs | phyla of animals, soft bodied, muscular foot, some have shells |
| classes of arthropods | insects, arachnids, crustaceans, myriapods |
| explain the structure of the insects body | thorax, abdomen, head, 2 pairs of antennae, 3 pairs of legs, terrestrial, wings may be vestigial |
| EXPLAIN THE STRUCTURE OF ARACHNIDS | 8 joint legs, no wings, no antennae, breath through gills, |
| explain the structure of crustaceans | tough outer exoskeleton, more than 4 pairs of legs,breath through gills, therfore most are aquatic |
| explain the structure of myriapods | many pairs of joint legs; a pair for each segment, one pair of antennae |
| why arent viruses considered as living things | because they are only alive when inside a hosted cell. otherwise they just exist. |
| what are viruses made of | proteins and genetic material |
| what do viruses cause | diseases |
