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General Revision of 3rd Quarter G 10
( Viruses , Protists and Genetics )
Student Name :………………………………………………….
Class:- …………….
Date:-………..
1- Write the correct letter in the blank.
_____ 1. The appearance of an organism is its
a. genotype. b. phenotype. c. genotypic ratio. d.
phenotypic ratio.
_____ 2. A genetic cross performed many times produces 798 long-stemmed
plants and 266 short-stemmed plants. The probability of obtaining a
short-stemmed plant in a similar cross is
a. 266/1,064. b. 266/798.
c. 798/266.
d. 798/1,064.
_____ 3. A monohybrid cross of two individuals that are heterozygous for a trait
exhibiting complete dominance would probably result in a phenotypic
ratio of
a. 4 dominant:0 recessive.
c. 3 dominant:1 recessive.
b. 1 dominant:3 recessive.
d. 1 dominant:1 recessive.
_____ 4. To determine the genotype of an individual that shows the dominant
phenotype, you would cross that individual with one that is
a. heterozygous dominant.
c. homozygous dominant.
b.
heterozygous recessive. d.
homozygous recessive
2- Write the possible genotypes of the offspring in the Punnett square below. Then
answer the questions in the spaces provided.
A plant with the genotype WwRr is crossed with another plant with the same
genotype.
1. What proportion of the offspring
will be dominant for both traits?
________________ 9-16
2. What proportion of the offspring
will have the same genotype as their
parents?
________________ 4-16
3. What proportion of the offspring
will be homozygous dominant for
both traits?
________________ 1-16
4. What proportion of the offspring
will be homozygous recessive for
both traits?
________________ 1-16
3- Refer to the figures below, which show three single-celled organisms, to answer
questions 16–21.
16. Organism A Moves by means of__________ falce fat _____________
17. Organism A is a type of protist called a(n) ___________ amoeba
18. Organism B moves by means of a(n) ________________ flagellum _______.
19. Organism B is a type of protist called a(n) _________ euglena
20. Organism C moves by means of_________________ cillia ______.
21. Organism C is a type of protist called a(n) _______ paramecium
25. Explain the role of algae in aquatic-ecosystem food chains.
Help forests and essential organisms serves as an integral parts of aquatic eco
system
4- Answer the questions in the space provided.
1.Describe
two differences between green algae and plants.
Plant multicilullar organisms – have vacuolar system conductivity
Green algae unicellular – don’t have vacuolar system conductivity
2. Why is phytoplankton important to other organisms Because it is the base of
all marine and fresh water food chains
5- Viruses are not considered to be living, yet they still have a major impact
on the living world. Explain how this is so.
Non living :no cytoplasm and no organels
Living :have DNA and made of protin
6- The diagrams below represent five steps in the lytic cycle of a bacteriophage. The order of
the steps has been scrambled. Arrange the steps in their correct order by writing the letter of
each step, and briefly describe what is happening in each step.
The virus attach the cell then inject its DNA and produce DNA and
New virus assemble and the new virus relaced
2
5
1
4
3
7- In the space provided, write the letter of the description that best matches the
term or phrase.
C_
D ___
1. capsid
2. lytic cycle
F__3.prion
A ___
4. provirus
B____5.bacteriophage
a. a viral gene that is inserted into a host
chromosome
b. a virus that infects bacteria
c. the protein coat of a virus
d. how virulent viruses replicate
e. infectious single strand of RNA with
no capsid
f. infectious protein with no nucleic acid
E____6.viroid
8- In the space provided, write the letter of the term or phrase that best completes
each statement or best answers each question.
_____ 1. Amoebas move using extensions of cytoplasm called
a. cilia.
b. flagella.
c. pseudopodia.
d. tests.
_____ 2. Paramecium takes in food through its
a. contractile vacuoles.
b. cilia-lined oral groove.
c. flexible outer pellicle.
d. two nuclei.
_____ 3. The process of sexual reproduction that involves the side by side
alignment of two filaments to exchange genetic material is called
a. mitosis.
b. conjugation.
c. alternation of generations.
d. meiosis.
_____ 4. The kingdom Protista includes
a. most of the single-celled eukaryotes.
b. slime and water molds.
c. multicellular algae.
d. All of the above
_____ 5. All of the following are structures used for protist movement except
a. cilia.
b. flagella.
c. zoospores.
d. pseudopodia.
9- Follow the directions given below.
30. The diagram below represents a protozoan.
a. Label each structure in the space indicated.
a- anal pore
b- gullet
c -cilia
d- mouth pore
e- mature food
vacuole
f- gullet
g- contractile
vacuole
b. Give the phylum and the genus of the organism shown above.
Phylum: ciliophora
Genus: paramecium