Ms. Kim's Chapter 9 Test
This is for 7th grade science at CVMS
Terms
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- Dinoflagellates
- unicellular plantlike protists, surrounded by stiff plates, variety of colored pigments
- Host Cell
- a living thing that provides a source of energy for a virus or an organism
- Which structures are in most bacteria cells?
- rigid cell wall, cell membrane, cytoplasm, ribosomes, genetic material
- What's the difference between active and hidden viruses?
- a hidden virus first hides its genetic material in the cell's genetic material and its copied when the cell is copied. then it takes over the cell's functions and the cell starts to produce the virus' proteins and genetic material and then assemble into new viruses
- How does bacteria get its oxygen to break down their food?
- by brealking down food in the process of respiration
- Protozoans with pseudopods have...
- food vacuoles, a nucleus, cytoplasm, contractile vacuole, and a cell membrane
- Once inside a cell what does the virus do?
- the virus' genetic material takes over many of the cell's functions.it instructs the cell to produce the virus' proteins and genetic material, these proteins and genetic material then assemble into new viruses
- Parasites
- organisms that live on or in a host and cause it harm
- What is the best treatment for viral diseases?
- resting, drinking plenty of water, and eating a well balanced meal
- bacteriophage
- a virus that infects bacteria
- vaccine
- a substance introduced to the body to stimulate the production of chemicals that destroy specific disease causing viruses and organisms
- How do different types of algae differ?
- organization, structure, function, unicellular or multicellular, differentiated tissues and organs, live in colonies or not
- Protozoans with cilia have...
- pellicle, large nucleus, small nucleus, cytoplasm, oral groove, food vacuole, anal pore, cilia, and contractile vacoules
- Green Algae
- most unicellular some multicellular plantlike protists, green, live on rocks or trees
- protist
- eukaryotes that cannot be classified as animals, plants or fungi
- bacteria
- prokaryotes whose genetic materialis not contained in a nucleus, and lacks a nucleus, mitichondria, and golgi bodies
- How does bacteria help with medicine?
- produces insulin for diabetics
- Diatoms
- unicellular plantlike protists, have glasslike cell walls, float on surface of water
- Where do water molds and downy molds live?
- in water or moist places
- contractile vacuole
- (pseudopods) a structure that contains the extra water and then expels it from the cell
- spore
- tiny cell that is able to grow into new organisms
- What is the role of bacteria in nature?
- they are involved in oxygen and food production, environmental recycling and cleanup, and in health maintenance and medicine production
- cilia
- hairlike projections from cells that move with a wavelike motion
- Euglenoids
- unicellular plantlike protists, green, live in fresh water, heterotrophs
- endospore
- (bacteria) a small rounded thick-walled resting cell that forms inside a bacterial cell, it contains the cell's genetic material and some of its cytoplasm
- sexual reproduction
- two parents combine their genetic material to produce a new organism that differs from both parents
- funguslike protists
- heterotrophs, have cell walls and use spores to reproduce
- What is the difference between a prokaryote and a eukaryote?
- A prokaryote lacks a nucleus, mitochondria, and golgi body
- Virus
- a tiny nonliving particle that invades and then multiplies inside a living cell
- mutualism
- relationship in which both partners benefit
- What is the difference between the four types of animal like protists?
- with psuedopods: move and feed by performing pseudopods, with cilia: use their cilia to move and obtain food, with flagella: use flagella to move, that are parasites: live depending on host
- protozoans
- unicellular, heterotrophs, can move, classified into four groups; protozoans with Pseudopods, protozoans with cilia, protozoans with flagella, protozoans that are parasites
- Bacteria must have a source of _________ and a way of __________________.
- food, breaking down the food to release its energy
- Why doesn't a vaccine cause disease themselves?
- because it is weakened or altered
- Brown Algae
- multicellular plantlike protists, brown, green, yellow, orange, complex structures
- flagellum
- a long whip-like structure that helps a cell move
- Red Algae
- multicellular plantlike protists, seaweed, red, can absorb light easily
- binary fission
- (bacteria) asexual reproduction process in which one cell divides to form two identical cells
- decomposers
- (bacteria) organisms that break down large chemicals in dead organisms into small chemicals
- What's another name for animal like protists?
- protozoans
- pseudopods
- temporary bulges of the cell
- symbiosis
- a close relationship in which at least one of the species benefits
- algae
- diverse autotrophs that usually use sun to perform photosynthesis
- What information does a virus' genetic material contain?
- instructions for making new viruses
- How can autotrophic bacteria obtain their food?
- use sun's energy, or energy from chemical substances
- conjugation
- (bacteria) one bacterium transfers some genetic material to another bacterium through a thread-like bridge. after the transfer the cells seperate
- where do slime molds live?
- on forest floors and other moist shady places
- How are viral diseases spread?
- they are spread by contacted with contaminated object, bite of infected animal, through tiny drops of moisture, an infected persons cough or sneeze, and through contact of body fluids
- pasteurization
- food ius heated to a temperature that is high enough to kill most harmful bacteria without changing the taste of the food
- asexual reproduction
- a reproduction process that involves only one parent and produces offspring that are identical to the parent
- What is the one way in which viruses are like organisms?
- they both can multiply
- All viruses have two basic parts, what are they?
- a protein coat that protects the virus and an inner core made of genetic material