Download UNIDAD EDUCATIVA PARTICULAR ECOMUNDO SCIENCE

UNIDAD EDUCATIVA PARTICULAR ECOMUNDO
SCIENCE REVIEW
GRADE: 9th. Basic
SECTION: A – B
ACADEMIC YEAR: 2014 – 2015
TEACHER: Lic. Leonila Andrade
NAME: _______________________________ DATE: __________________
1) Choose the correct word for the meaning.
virus
binary fission
host
Archaea bacteria
host
bacteria
binary fission
virus
a)
A domain made up of prokaryotes is
__________________
b)
An organism from which a parasite takes food or shelter is __________________
c) A form of asexual reproduction in single celled organism is
___________________
d)
A nonliving, infectious particle composed of a nucleic acid and a protein coat is ……
e)
A (n) __________________ is made of genetic material and a protein coat.
f)
_______________________ is when one cell reproduces by dividing in half to become
two cells.
g)
A virus needs a(n) ___________________ to reproduce.
2. BACTERIA AND ARCHAEA. Choose the correct answer. What are some characteristics
of bacteria?
* WHAT IS Bacteria?................................................................................................................
*What is Archaea? ………………………………………………………………………………..
* What are viruses? ………………………………………………………………………………..
a) Many bacteria are consumer / products that get their nutrients by feeding on other
organisms.
b) Some Bacteria stick together to form strands or films. They are small / medium, singlecelled organisms.
c) Bacteria can be found almost everywhere on Earth.
They can be found breading
down / up dead material in soil.
d) Some bacteria can survive during periods when environmental conditions become harsh by
forming endospores / macrospores.
e) Archaea are prokaryotes with variable cell walls made up of unique molecules.
Archaea are more / less similar to eukaryotes than bacteria.
f) Scientists have found them in the hot / cold springs.
g) They can live in extremely acidic and extremely salty / sweet habitats.
h) Archaea have even been found living 8 km. under / below the Earth´s surface.
2. Explain. How do the cell walls of bacteria and archaea differ?
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
……………………………………………………………………………………………
3. Compare. How do Prokaryotes and Eukaryotes differ?
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
……………………………………………………………………………………………
4. Draw and Label the characteristics of Prokaryote and Eukaryote cells.
5. Bacteria AND VIRUS. Mark the sentences below T (true) or F (false).
a)
b)
c)
d)
e)
f)
g)
h)
Bacteria grow if they have the space and food they need.
Bacteria reproduce by diving in three cells.
There are three ways that bacteria acquire new genetic
information
In binary fission, a bacterial cell copies its DNA.
Virus is a microscopic particle that cannot replicate on its own.
Many viruses cause diseases, such as the common cold, flu and
acquired immune deficiency syndrome (AIDS)
The genetic material can be either DNA or RNA
Viruses are alive, they can replicate only inside a living cell
that serves as foreign.
T
T
F
F
T
T
T
F
F
F
T
T
F
F
T
F