Category: 2nd Semester

Quiz Viruses

Name: 

Viruses

 

 

True/False
Indicate whether the sentence or statement is true or false.
1.
Although viruses do not consist of cells, biologists consider them to be living because they are capable of reproduction.
2.
Wendell Stanley made the important discovery that viruses are not cellular.
3.
Viruses consist of RNA or DNA surrounded by a coat of protein.
4.
Prions are the smallest known particles that are able to replicate.
5.
A virus can only reproduce by controlling a cell.
6.
People can contract the influenza virus more than once because the virus tends to mutate rapidly, avoiding the actions of the immune system.
7.
Smallpox is caused by bacteria.
8.
Chickenpox and shingles are caused by the same virus.
9.
The viruses that have been linked to human cancers are usually transmitted through the air.
 

Completion
Complete each sentence or statement.
10.
The protein coat of a virus is called a(n) ____________________.
11.
Most viruses occur in the shape of a(n) ____________________ or a(n) ____________________.
12.
A virus that transcribes DNA from an RNA template is called a(n) ____________________.
13.
An enzyme called ____________________ manufactures DNA that is complementary to a virus’s RNA.
14.
____________________ are bacterial viruses with a polyhedral head and a helical tail.
15.
All viruses reproduce by taking over the reproductive machinery of a ____________________.
16.
Viruses that infect a host cell and have their nucleic acid replicated but do not harm the host cell are in a ____________________ cycle.
17.
A viral DNA molecule formed from an RNA virus is called a(n) ____________________.
18.
The virus that causes AIDS is called ____________________.
19.
Some viruses are thought to induce ____________________, a disease characterized by uncontrolled cell division.
20.
An example of an emerging virus is the  ____________________ virus.

 
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Pzsol Mammals

Mammal Orders Solution

A T A M E R T O N O M A C A + + I + S + + A + R + R R A E P C + L + E I + O + T + O R C E + H + A N T D + I + A V N A R + + I E I E A O + E + I I T I + + R R N P D M D + + T V E S + I + T O A U I I + + C O C S S + I + C P C S + R + E R + O + A + T + S T + R + P S A + D + + Y + O + + E + A + N + + A + L + B + + + + R + M I + + C A + O + + + + + + A + + + + T + R L A G O M O R P H A + + Y P + + A T A T N E D E + + + L + + + + + + + + + + + + + + A (Over,Down,Direction) ARTIODACTYLA(12,1,SW) CARNIVORA(13,1,S) CETACEA(14,7,N) CHIROPTERA(1,3,SE) EDENTATA(11,14,W) INSECTIVORA(12,11,N) LAGOMORPHA(3,13,E) MARSUPIALIA(11,11,NW) MONOTREMATA(11,1,W) PERISSODACTYLA(15,2,S) PRIMATES(11,9,NW) PROBOSCIDEA(1,14,NE) RODENTIA(9,2,SW) SIRENIA(1,8,NE)

Pzsol Mollusks

 

Mollusks

Answer Key: (Students may have a different order.)
   


mollusca
slugs
clams
octopus
nautilus
marine
coelomate
trocophore
invertebrate
snails
visceral
mantle
radula
gastropods
torsion
hemolymph
hemocoel
cephalopods
bivalvia
nudibranch
nocturnal
tentacles
pteropod
adductor
oyster
scallop
foot
siphon
incurrent
squid
chromatophores
propulsion

 

Pzsol Moss Fern

Moss & Fern Puzzle Solution

Plants that lack tubes to carry food and water are called nonvascular plants. These plants are also known as bryophytes. Most bryophytes are terrestrial and live in moist environments. Water is required so that the sperm can swim to the egg during fertilization. Bryophytes do not produce seeds, but instead produce spores to reproduce. These plants exhibit alternation of generations in their life cycle. Because these plants lack vascular tissue, they are small in  height.

Moss is one example of a bryophyte that grows like a lush, green carpet. The dominant stage in the moss life cycle is the gametophyte. Root like rhizoids attach each gametophyte to the soil but do not absorb water. Both male and female gametophytes exist. The sporophyte generation is attached to the top of the gametophyte. Mosses are called pioneer plants because they often are the first plants to re-enter a barren area. Mosses also help prevent soil erosion. Sphagnum, or peat moss, is harvested and burned as fuel in some countries.

Liverworts and hornworts are nonvascular plants that also grow in moist, shady places. Liverworts have leaflike structures along a stem and lay close to the ground. Hornworts, like algae, have a single large chloroplast in each cell.

Ferns are simple, vascular plants that also lack seeds and reproduce by spores. Tree ferns are the largest ferns. Most ferns have an underground stem called a rhizomes. New leaves of ferns are tightly coiled and are called fiddleheads. Mature fern leaves are called fronds. Spores are produced on the underside of fern fronds.

 

Pzsol Photosynthesis

 

 

Photosynthesis

Answer Key:

 
 

All organisms use energy to carry out their life functions. Some organisms obtain this energy from sunlight. The process by which this energy transfer takes place is called photosynthesis. Photosynthesis involves a biochemical pathway in which the product of one reaction is consumed in the next reaction. Autotrophs are organisms that carry on photosynthesis and includes plants and other organisms containing the green pigment chlorophyll. Autotrophs use carbon dioxide and water to make oxygen and the simple sugar glucose. The pigment chlorophyll absorbs light energy from the sun during the light reactions. Accessory pigments also in the chloroplast absorb other wavelengths of light that chlorophyll does not absorb. These accessory pigments are responsible for other colors we see in plants such as red, orange, and yellow. Chloroplasts are surrounded by a double membrane. Inside chloroplasts is a system of membranes arranged as stacks of flattened sacs called granum. Each sac in the stack is called a thylakoid. The thylakoids are surrounded by a solution called the stroma. The dark reactions of photosynthesis take place in the stroma. Most chloroplasts are found in the leaves of plants. The underside of a leaf contains openings called stomata where gases such as oxygen and carbon dioxide enter and leave. These openings or stomata are closed during the hottest times of the day by cells called guard cells.