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WorksheetsLife Science "Benchmark" Post Test
Total questions: 54
Worksheet time: 28mins
Name
Class
Date
1.
In an aquatic food web, algae acts as the producers. What is the original source of energy stored in algae?
a)
food made by photosynthesis
b)
organisms that algae has eaten
c)
light energy from the sun
d)
chemical energy stored in the cells of the algae
2.
A butterfly is feeding on nectar from a flower. When the butterfly moves to another flower, it transfers pollen from the first flower to the second. This act helps the plant reproduce. Which of these describes the symbiotic relationship between the butterfly and the flower?
a)
the butterfly benefits, and the flower is harmed
b)
the butterfly benefits without harming the flower
c)
the flower benefits but the butterfly does not
d)
both the flower and the butterfly benefit from the relationship
3.
What fluid fills most of the inside of a cell?
a)
plamsa
b)
water
c)
cytoplasm
d)
chlorophyll
4.
How could you use a dichotomous key?
a)
to identify an organism you found on a field trip
b)
to identify the habitat of an unknown organism
c)
to figure out what predators feed on an organism
d)
to identify how an unknown organism reproduces
5.
Variations may allow the physical characteristics of an organisms to change over successive generations. Which of the following are most likely to lead to variations within a species over time?
a)
photosynthesis and asexual reproduction
b)
mutation and sexual reproduction
c)
selective breeding and asexual reproduction
d)
photosynthesis and sexual reproduction
6.
Which of theses organ systems controls and coordinates most body functions?
a)
excretory
b)
digestive
c)
nervous
d)
reproductive
7.
What biome is made up of land that is covered by water for at least part of the year?
a)
river
b)
lake
c)
wetland
d)
taiga
8.
A certain species of trilobite is known to have lived 300 million years ago. If this index fossil was found in a rock layer containing other fossils, what could you infer about the other fossils?
a)
the rock layer killed the trilobite and the other fossils
b)
the other fossils are about 300 million years old
c)
the organisms that formed the other fossils went extinct
d)
the rock layer formed before the trilobite or the other fossils
9.
Which of these describes nitrogen fixation?
a)
Bacteria convert nitrogen gas into a form of nitrogen that can be used by plants
b)
plants take nitrogen gas into their roots
c)
animals release wastes that contain nitrogen
d)
bacteria release nitrogen gas into the atmosphere
10.
A bird species feeds on the seeds of a particular tree. A drought causes the outer covering of the seeds to become thicker and harder. After meany generations of drought, what is the most likely effect of this change on the birds?
a)
there will be no physical or behavioral change in the birds
b)
all birds will starve, and the species will become extinct
c)
the birds will have stronger beaks
d)
some of the birds will be larger and some will be smaller
11.
Why might breeders use inbreeding when breeding a certain animal?
a)
to produce only offspring that are genetically identical
b)
to produce offspring that have greater genetic variation
c)
to produce offspring that have specific traits
d)
to produce offspring that have no genetic similarities to one another
12.
In what type of symbiotic relationship does one species benefit while the other is not affected?
a)
predation
b)
mutualism
c)
commensalism
d)
competition
13.
Which of these processes of organisms needs carbon dioxide from the atmosphere?
a)
digestion
b)
cellular respiration
c)
photosynthesis
d)
denitrification
14.
A fox eats a rabbit that feeds on plants. The fox is a
a)
secondary consumer
b)
producer
c)
primary consumer
d)
decomposer
15.
Which of these aquatic biomes is characterized by freshwater that runs over land?
a)
tundra
b)
ocean
c)
lake
d)
river
16.
Which of these cell structures is involved in the inheritance of traits?
a)
chloroplast
b)
cytoplasm
c)
chromosome
d)
mitochondrion
17.
Which pair of organs systems work together to fight viral diseases such as the flu?
a)
respiratory and nervous
b)
circulatory and immune
c)
digestive and reprodcutive
d)
immune and excretory
18.
A type of flatworm called a planarian can divide itself in half, with each half becoming a complete new organism. This method of reproduction is known as
a)
vegetative propagation
b)
sexual reproduction
c)
budding
d)
regeneration
19.
Which biome is characterized by cold, dry conditions?
a)
wetland
b)
tundra
c)
grasslands
d)
taiga
20.
Which organ system breaks down food into nutrients cells need?
a)
immune
b)
excretory
c)
nervous
d)
digestive
21.
What happens if an environment changes and a population in that environment has no adaptations for the new environment?
a)
the population forms anew species
b)
the population tries to change in its enviroment
c)
the population tries to develop adaptations to prevent extinction
d)
the population is not likely to survive and may become extinct
22.
In an ecosystem, eagles and bass both feed on perch. What is the relationship between the eagles and the bass?
a)
competition
b)
parasitism
c)
mutualism
d)
predation
23.
A squirrel eats nuts and acorns from trees. What happens to the nutrients from that food when the squirrel dies?
a)
all the nutrients are lost
b)
some of the nutrients are returned to the ecosystem
c)
the nutrients serve no further purpose once the squirrel dies
d)
All the nutrients are returned to the ecosystem
24.
Some bacteria are decompoosers that feed on the wastes of other organisms. What is the initial source of energy for bacteria that feed on wastes?
a)
sunlight
b)
food
c)
chemical compounds
d)
wastes
25.
Three finch species observed by Charles Darwin on the Galapagos Islands each had different beak shapes. Which statement is most likely true about these finches?
a)
The different beaks are the result of adaptations to eating certain kinds of food on the islands
b)
the different beaks are the result of adaptations to the amount of food available: the more food the larger the beak
c)
the different beaks are not related to the food the birds eat but to the length of the finches life
d)
the different beaks are not related to the food the birds eat but to the season
26.
What level of organization is made up of a group of similar cells that perform a specific function?
a)
organelle
b)
tissue
c)
organ
d)
system
27.
What is the most common way plants and animals reproduce?
a)
vegetative propagation
b)
binary fission
c)
sexual reproduction
d)
budding
28.
In which biome would you most expect to find bears, deer, rabbits, squirrels, and deciduous trees?
a)
desert
b)
rain forest
c)
tundra
d)
temperate forest
29.
Which of the following defines mutualism?
a)
the change in ecosystems populations through time as factors in the environment change
b)
a relationship between two species in which one organism benefits while the other is harmed
c)
a relationship between two species in which one organism gains and the other is neither helped nor harmed
d)
a relationship between two species in which both organisms benefit
30.
Which of the following cell processes does not depend on nutrients?
a)
growth
b)
making needed materials
c)
cell division
d)
response to stimuli
31.
Which organ is part of the human respiratory system?
a)
trachea
b)
heart
c)
stomach
d)
veins
32.
What is the main kind of plant life in a temperate forest?
a)
deciduous trees
b)
grasses
c)
cone-bearing trees
d)
cacti
33.
Which list below shows the order in which energy flows through an ecosystem?
a)
sun to producers to consumers
b)
consumers to producers to sun
c)
sun to consumers to producers
d)
consumers to sun to producers
34.
Which cell part or organelle contains the cell's genetic information?
a)
cytoplams
b)
chloroplast
c)
nucleus
d)
mitochondria
35.
Which of the following is the main factor that drives biological evolution?
a)
individuals compete for unlimited natural resources
b)
variation exists within populations
c)
organisms produce very few offspring
d)
environmental stability increases genetic perfection in organisms
36.
Which form of reproduction is common in the single-celled fungi known as yeasts?
a)
vegetative propagation
b)
binary fission
c)
sexual reproduction
d)
budding
37.
In a desert ecosystem, hawks, coyotes, and snakes all feed on rabbits. What type of relationship exists among the hawks, coyotes, and snakes?
a)
predator- prey
b)
competition
c)
mutualism
d)
commensalism
38.
You have french fries at lunch. What was the original source of the energy in the french fries?
a)
the oil in which the fries were cooked
b)
the heat used to cook the fires
c)
the sunlight taken in by the potatoes from which the fries were made
d)
the chemical energy stored as food in the fries
39.
A pea plant has purple flowers. The plant inherited only one gene for purple flowers from its parents. What kind of trait is the trait for purple flowers in pea plants?
a)
dominant
b)
recessive
c)
hybrid
d)
mutated
40.
What are the main kinds of plants in a Savannah?
a)
deciduous trees
b)
grasses
c)
cone-bearing trees
d)
cacti
41.
Index fossils are fossils of species that lived for only a short period of time and lived on many parts of the planet. Index fossils are useful for
a)
naming new fossils
b)
determining where a new fossil is from
c)
determining the age of a new fossil
d)
developing a list of all species that ever lived in a certain area
42.
How does the respiratory system meet the needs of your cells?
a)
by taking in nutrients and removing wastes
b)
by taking in oxygen and removing carbon dioxide
c)
by transporting nutrients to cells
d)
by carrying wastes away from cells
43.
Which cell structure controls most of the activities in a cell?
a)
cytoplasm
b)
nucleus
c)
cell membrane
d)
mitochondria
44.
Which of the following life processes produces carbon dioxide as a waste product that is eventually returned to the atmosphere?
a)
nitrogen fixation
b)
denitrification
c)
photosynthesis
d)
cellular respiration
45.
Which of the following is the most complex level of organization in the human body?
a)
cell
b)
tissue
c)
organ
d)
organ system
46.
Certain species of butterflies are so specialized that they will lay their eggs on only one type of plant. What will most likely happen if people destroy the plant's habitat in order to build a road?
a)
the butterflies will find different types of plants on which to lay their eggs
b)
the butterflies will eventually die off because they are unable to reproduce
c)
the butterfly population will expand
d)
the habitat will recover
47.
A certain type of bacteria lives in the digestive tract of cattle. The cattle give the bacteria a place to live, while to bacteria help the cattle digest plants. What type of relationship exists between the cattle and the bacteria?
a)
predator- prey
b)
parasitism
c)
mutualism
d)
commensalism
48.
Which shows the correct order of organs through which air passes when it is taken into the respiratory system?
a)
nose or mouth, trachea, bronchi, lungs
b)
noes or mouth, bronchi, trachea, lungs
c)
nose or mouth, trachea, lungs, bronchi
d)
nose or mouth, bronchi, trachea, lungs
49.
In which of these biomes are you most likely to find plants with needle-like leaves?
a)
wetland
b)
tropical rain forest
c)
grasslands
d)
taiga
50.
Genetic variation aids in the emergence of new species. new species are more likely to evolve when organisms reproduce
a)
sexually
b)
by binary fission
c)
asexually
d)
by budding
51.
Which organism reproduces through binary fission?
a)
bacterium
b)
robin
c)
mushroom
d)
moss
52.
Which of the following organisms is most likely to serve as a decomposer?
a)
a plant
b)
an animal
c)
a fungus
d)
an alga
53.
The land biome that has the most species of plants and animals is the
a)
tropical rain forest
b)
coral reef
c)
temperate forest
d)
mountain
54.
What structure forms a boundary between a cell's internal and external environments?
a)
cytoplasm
b)
nucleus
c)
cell membrane
d)
mitochondria
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