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Life Science Section 6A Quiz Practice
Test Description: S
Instructions: Answer all questions to get your test result.
1) Scientists and doctors have known for many years that the human body harbors ______ of bacterial cells.
A
hundreds of thousands
B
trillions
C
millions
D
billions
2) Some bacteria help us digest our food, and some produce important _______.
A
vitamins
B
proteins
C
tissues
D
minerals
3) Most microbiota are ________. In fact, many are beneficial.
A
harmless
B
mortal
C
malignant
D
lethal
4) Because a bacterium lacks a nucleus, its DNA, which forms a circular _________, is suspended in the cytosol.
A
golgis
B
chromosomes
C
molecules
D
ribosomes
5) Some bacteria have a slimy coating called a capsule that covers their cell walls. The capsule prevents the bacterium from ________ out.
A
running
B
going
C
drying
D
washing
6) Bacteria living in the different temperature areas of the Grand Prismatic Spring produce the different _______.
A
smells
B
temperatures
C
toxins
D
colors
7) The hot, rainbow-colored waters of the Grand Prismatic Spring in Yellowstone National Park, would be _______ for a human.
A
beneficial
B
deadly
C
benign
D
constructive
8) Although ________ are most famous for living in extreme places such as hot springs, they also live in more ordinary places such as the ocean, swamps, and even the human body.
A
archaea
B
viruses
C
bacteria
D
euglena
9) Most prokaryotes are classified in kingdom ______. They lack membrane-bound organelles.
A
microbia
B
archaea
C
bacillius
D
bacteria
10) Normally bacteria reproduce by _______ fission.
A
multiple
B
natural
C
binary
D
synthetic
11) The reason the earth hasn’t been destroyed by bacteria is that the conditions must be exactly right for bacteria to _______ so quickly.
A
expand
B
grow
C
reproduce
D
rebuild
12) Some bacteria can reproduce every _______ minutes.
A
five
B
thirty
C
fifty
D
twenty
13) Sometimes the ________ are so poor that bacteria struggle to survive.
A
cells
B
endospores
C
conditions
D
chromosomes
14) _______ need nitrogen to grow, but they can’t use the nitrogen gas in the atmosphere.
A
Plants
B
Bacteria
C
Archaea
D
Heterotrophs
15) Bacteria are so _______ that it’s hard to find a process that they are not involved in.
A
elusive
B
divergent
C
rare
D
common
16) While we often think of bacteria as something to be ______ or killed, many of them are quite helpful.
A
embraced
B
avoided
C
respected
D
grasped
17) Bacteria called ________ are responsible for recycling matter from waste materials and the remains of plants and animals into the soil where they can be reused.
A
heterotrophs
B
autotrophs
C
decomposers
D
producers
18) The most common nutrient on Earth is _______. Too bad people and most animals can’t digest it.
A
carbohydrate
B
cellulose
C
glycogen
D
glucose
19) Many of the bacteria in your microbiota keep other, less friendly _______ from starting to grow in or on your body.
A
DNA
B
RNA
C
viruses
D
bacteria
20) Part of the Curse included bacteria becoming the cause of __________ such as tuberculosis, strep throat, and food poisoning
A
diseases
B
antidotes
C
organisms
D
remedies
*select an answer for all questions
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