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Total questions: 25
Worksheet time: 13mins
Which of the following scientific names appears correctly?
Quercus rubra
Quercus Rubra
Quercus Rubra
Quercus rubra
A student used a microscope to study four members of the phylum Ciliophora. Members of this phylum move when propelled by hundreds of tiny cilia. Although these organisms belong to the same phylum, they are classified as different --
species
families
kingdoms
orders
Based on this information, which statement correctly describes the relationship between the two populations of tree frogs?
They are in the same genus but different species.
They are in the same family but different orders.
They are in the same class but different phyla.
They are in the same species but different kingdoms.
The diagram shows a dichotomous key and a picture of a fruit. According to the key, the fruit comes from which species of tree?
Acer negundo
Acer platanoides
Fraxinus americana
Fraxinus nigra
The classifications of four trees are shown in the table. Which two trees are the most closely related?
Taiwan catkin yew and lodgepole pine
Lodgepole pine and Japanese maple
Taiwan beech and Taiwan catkin yew
Japanese maple and Taiwan beech
Why is it best for scientists to use the name from the standardized taxonomic system?
All scientists will be using one name for mountain lions.
Communication with other scientists about mountain lions will be reduced.
The standardized name is less descriptive of the animal that has been observed.
The standardized name differentiates mountain lions and pumas.
Frogs and toads belong to the order Anura. The smallest organism in this order is about 7 millimeters long, while the largest member is about 30 centimeters long. Which of these lists best describes this order?
28 families
338 genera
4,360 species
338 families
28 genera
4,360 species
338 families
4,360 genera
28 species
28 families
4,360 genera
338 species
If two structurally similar individuals produce fertile offspring in nature, they are considered to be the members of the same
Species
class
Genus
Kingdom
How do viruses reproduce?
inserting DNA into the host cell
sexually, by external fertilization
replication outside the host
they divide by mitosis
The Linnaean taxonomic system classifies organisms into divisions called taxa. If two organisms belong to the same taxonomic group, they are related. Similarity which of these levels indicates the closest relationship?
Genus
Order
Kingdom
Class
Why do some viruses seem to go away and then return later, like a cold sore?
the virus mutated
the immune system forgot the virus
host has been infected with a different strain
the virus had entered the lysogenic cycle
Two major components of Viral structure are
Capsid and DNA/RNA structure
Cell Membrane and Nucleic acid structure
Only Nucleic Acid structure
Matrix protein and Lipid
Viruses are destroyed by antibiotics
FALSE
TRUE
Vaccines can be used to prevent viral infection by:
creating an immune response in the host
destroying any viruses that enter the host
creating a blocking protein on the cell
preventing replication of the virus
A table comparing the characteristics of four samples is shown. Which sample most likely contains viruses?
Sample 1
Sample 2
Sample 3
Sample 4
The key difference between lytic and lysogenic is
the lytic cycle the host cell undergoes lysis while during the lysogenic cycle, the host cell does not undergo lysis straight away.
the lytic cycle waits to replicate
the lysogenic cycle will replicate quickly and kill the host cell
there is no difference, they both kill the host instantly
An illness caused by a certain virus includes fever rash, joint pain, red eyes and headache. The virus is transmitted to people by infectious mosquitos. Symptoms quickly occur within three to twelve days after contracting the virus. There is no vaccine for the virus.
Which description best explains the reproductive cycle of this virus?
Lytic, because the virus is transmitted by mosquitos.
Lysogenic, because there is no way to vaccinate against it.
Lytic, because of the quick incubation time.
Lysogenic, because the virus causes a fever.
This diagram is an example of which cycle
Lytic Cycle
Lysogenic Cycle
Kreb Cycle
Bacteriophage Cycle
The image above is an example of which type of virus
bacteriophage
ebola virus
adenovirus
tobacco mosaic virus
Which viral life cycle allows viral genetic material to lay dormant while the host cell reproduces?
Lysogenic
Lytic
mitosis
S phase
Is a virus considered living or non-living?
Non-living, because it can not reproduce without a host, no metabolism, and
Living, because it can replicate itself
Living, because it can kill the host
Neither, it difficult for scientists to classify
What do viruses have in common with living cells? They both...
store genetic information
have chloroplast
use glucose for cellular respiration
have endoplasmic reticulum
A student researching bacteria concluded a report with the following claim:
"All bacteria disrupt the health of organisms they inhabit, including humans"
Which statement correctly addresses the validity of the claim?
The claim is valid because many studies and experiments have shown that bacteria disrupt homeostasis.
The claim is invalid because there are many types of bacteria that help organisms maintain homeostasis.
The claim is invalid because only microorganisms such as viruses disrupt the health of organisms.
The claim is valid because bacteria cause disease.
Why does this type of bacteria-filled supplement benefit human health instead of causing illness?
Stomach acids and digestive enzymes kill the bacteria in this type of supplement, protecting the person against future infections by live organisms.
The human digestive system contains billions of beneficial bacteria that enhance digestion and nutrient absorption, synthesize vitamins, and help limit the growth of harmful bacteria.
These species of bacteria remove all other species of microorganisms living in the human digestive system and ensure that no microorganisms survive to contaminate the body.
These bacteria are able to deactivate viruses that may inhibit the human digestive system and are used to protect against further viral infections.
Some fungi secrete substances that are toxic to bacteria that compete with them for food. Scientists have used their knowledge of this ability of fungi in order to produce which of the following substances?
Yogurt
Fertilizers
Plastics
Antibiotics
