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biology exam: classifications

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Dina Kamal

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what does infertile mean

cannot produce an offspring

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42 questions
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 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
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
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