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WorksheetsSCIENCE 7 2ND GRADING M. CHOICE
Total questions: 125
Worksheet time: 2hrs 5mins
Name
Class
Date
1.
The first micrsocope was invented by Dutch eyeglass makers in (a) .
2.
In 1665, (a) , an Englishman, used one of his microscopes to look at thin slices of plant parts, woods and pieces of cork.
3.
In the early 1670s, a Dutch biologist named (a) used his handheld microscopes to examine samples of pond water, in which he saw a whole new world of tiny living things known as microorganisms.
4.
In the early 1670s, a Dutch biologist named Antonie van Leeuwenhoek used his handheld microscopes to examine samples of pond water, in which he saw a whole new world of tiny living things known as (a) .
5.
A _____ has only one lens.
a)
simple microscope
b)
lens
c)
compound light microscopes
d)
diaphragm
e)
revolving nosepiece
6.
A ____ is a curved piece of glass that allows light rays to pass through.
a)
simple microscope
b)
lens
c)
compound light microscopes
d)
diaphragm
e)
revolving nosepiece
7.
Microscopes that have more than one lens are called ______.
a)
simple microscope
b)
lens
c)
compound light microscopes
d)
diaphragm
e)
revolving nosepiece
8.
It supports and holds the other parts and, together with the arm, is used for carrying the microscope.
a)
base
b)
arm
c)
diaphragm
d)
revolving nosepiece
e)
body tube
9.
It is the basic frame to which the base, body and stage are attached
a)
base
b)
arm
c)
diaphragm
d)
revolving nosepiece
e)
body tube
10.
It is a round device found under the stage
a)
base
b)
arm
c)
diaphragm
d)
revolving nosepiece
e)
body tube
11.
It is a revolving section that holds the objective lenses.
a)
base
b)
arm
c)
diaphragm
d)
revolving nosepiece
e)
body tube
12.
It supports the eyepiece; it also maintains thae proper distance between the eyepiece and the objective lenses.
a)
base
b)
arm
c)
diaphragm
d)
revolving nosepiece
e)
body tube
13.
It is where you look through to view the specimen placed on the stage
a)
eyepiece
b)
stage
c)
objective lenses
d)
adjustment knobs
e)
inclination joint
14.
It holds the glass slide where the specimen is mounted and the stage clips, which keep the slide in place.
a)
eyepiece
b)
stage
c)
objective lenses
d)
adjustment knobs
e)
inclination joint
15.
It magnify the specimen to form an enlarged image.
a)
eyepiece
b)
stage
c)
objective lenses
d)
adjustment knobs
e)
inclination joint
16.
Consist of coarse adjustment knob for rough focusding and fine adjustment knob for precision focusing.
a)
eyepiece
b)
stage
c)
objective lenses
d)
adjustment knobs
e)
inclination joint
17.
Connects the arm to the base; this can be used to tilt the microscope for a more comfortable viewing.
a)
eyepiece
b)
stage
c)
objective lenses
d)
adjustment knobs
e)
inclination joint
18.
Reflects the light from an external light source up through the hole at the bottom of the stage.
a)
mirror
b)
eyepiece
c)
stage
d)
objective lenses
e)
adjustment knobs
19.
The first micrsocope was invented by (a) in 1590
20.
You now know that if you look through the eyepiece of the microscope, the specimen would appear (a) times larger.
21.
The _________ lens can magnify an object 10 times, the total magnification will be 10x10 or 100x.
a)
low power objective (LPO)
b)
high-power objective (HPO)
c)
oil immersion objective (OIO)
d)
limit of resolution
22.
An object under the _______ lens is magnified 10x40 or 400x.
a)
low power objective (LPO)
b)
high-power objective (HPO)
c)
oil immersion objective (OIO)
d)
limit of resolution
23.
The _______ lens can magnify an object up to 1000x.
a)
low power objective (LPO)
b)
high-power objective (HPO)
c)
oil immersion objective (OIO)
d)
limit of resolution
24.
As you increase the magnifying power, you can see the details of the object only upto a certain point, betond that point, called the _______, the object gets blurred.
a)
low power objective (LPO)
b)
high-power objective (HPO)
c)
oil immersion objective (OIO)
d)
limit of resolution
25.
The ____ is a thin, semipermeable membrane that serves as the outer covering of the cell.
a)
cell membrane
b)
cytoplasm
c)
protoplasm
d)
nucleus
e)
nuclear membrane
26.
The fluid that lies between the cell membrane and the nucleus is called the _____.
a)
cell membrane
b)
cytoplasm
c)
protoplasm
d)
nucleus
e)
nuclear membrane
27.
The living components of the cell outside the nucleus is called ______.
a)
cell membrane
b)
cytoplasm
c)
protoplasm
d)
nucleus
e)
nuclear membrane
28.
The ____ controls all cellular activities and contains most of the cell's genetic material.
a)
cell membrane
b)
cytoplasm
c)
protoplasm
d)
nucleus
e)
nuclear membrane
29.
The thin membrane that separates the nucleus from the ress of the cell is called _____
a)
cell membrane
b)
cytoplasm
c)
protoplasm
d)
nucleus
e)
nuclear membrane
30.
Most of a cell's genetic information is contained in structures called _____.
a)
chromosomes
b)
cell membrane
c)
cytoplasm
d)
protoplasm
e)
nucleus
31.
Human body cells have (a) chromosomes.
32.
The cytoplasm contains other structures such as the vacuoles, lysosomes, mitochondria, ribosomes and endoplasmic reticulum and these structures are called _____
a)
organelles
b)
nucleolus
c)
ribosomes
d)
endoplasmic reticulum
33.
When observing the cell nucleus under the microscope, a dark spot can be seen within and this spot is called ______, which looks like a small nucleus inside the big nucleus.
a)
organelles
b)
nucleolus
c)
ribosomes
d)
endoplasmic reticulum
34.
These are tiny, grainlike organelles that make proteins, and so they are the sites of protein synthesis.
a)
organelles
b)
nucleolus
c)
ribosomes
d)
endoplasmic reticulum
35.
The _______ is involved in the transport of proteins and they are like flattened sacks that are stacked side by side.
a)
organelles
b)
nucleolus
c)
ribosomes
d)
endoplasmic reticulum
36.
Some endoplasmic reticulum (ER) may have ribosomes attached to them that make their surface look rough and these are called _____
a)
rough endoplasmic reticulum
b)
smooth endoplasmic reticulum
c)
mitochondria
d)
adenosine triphosphate
37.
The other type of ER is the _______ which processes lipids and carbohydrates and gets rid of toxic wastes.
a)
rough endoplasmic reticulum
b)
smooth endoplasmic reticulum
c)
mitochondria
d)
adenosine triphosphate
38.
The _____ supply most of the energy needed by the cell and are often referred to as the "powerhouse".
a)
rough endoplasmic reticulum
b)
smooth endoplasmic reticulum
c)
mitochondria
d)
adenosine triphosphate
39.
The energy is stored in a special molecule that the cell uses to work done and this molecule is called _____.
a)
rough endoplasmic reticulum
b)
smooth endoplasmic reticulum
c)
mitochondria
d)
adenosine triphosphate
40.
Proteins and other materials are processed in and shipped ouit of a eukaryotic cell by the (a) , named after Camillo Golgi, the Italian scientist who first identified it.
41.
Proteins and other materials are processed in and shipped ouit of a eukaryotic cell by the Golgi complex, named after (a) , the Italian scientist who first identified it.
42.
The _____ are small, round structures involved in the digestive activities of the cell.
a)
lysosomes
b)
unicellular organism
c)
bacteria
d)
microorganisms
e)
multicellular organism
43.
All organisms are made of at least one cell; if a single cell performs all the functions of an entire organism and lives on its own, it is called a _______
a)
lysosomes
b)
unicellular organism
c)
bacteria
d)
microorganisms
e)
multicellular organism
44.
An example of unicellular organism is the _____.
a)
lysosomes
b)
unicellular organism
c)
bacteria
d)
microorganisms
e)
multicellular organism
45.
Organisms that can be seen only with a microscope are called _____
a)
lysosomes
b)
unicellular organism
c)
bacteria
d)
microorganisms
e)
multicellular organism
46.
Humans are a ______; this means that humans exist as a group of cells and these cells can survive only if they remian a part of your body.
a)
lysosomes
b)
unicellular organism
c)
bacteria
d)
microorganisms
e)
multicellular organism
47.
Plant cells ha a _____, this is a tough, rigid outer covering that protects the plant cell and helps maintain its shpae.
a)
cell wall
b)
chloroplasts
c)
chlorophyll
d)
photosynthesis
e)
vacuoles
48.
Plants with green leaves have special organelles called ______, which are green, irregularly shaped structures that contain chlorophyll.
a)
cell wall
b)
chloroplasts
c)
chlorophyll
d)
photosynthesis
e)
vacuoles
49.
It is a green pigment that uses the energy from sunlight to make food for plant cells in a process called photosynthesis.
a)
cell wall
b)
chloroplasts
c)
chlorophyll
d)
photosynthesis
e)
vacuoles
50.
Chlorophyl is a green pigment that uses the energy from sunlight to make food for plant cells in a process called _______.
a)
cell wall
b)
chloroplasts
c)
chlorophyll
d)
photosynthesis
e)
vacuoles
51.
Cell also contain fluid-filled organelles called _____.
a)
cell wall
b)
chloroplasts
c)
chlorophyll
d)
photosynthesis
e)
vacuoles
52.
Scottish botanist, discovered the central part of the cell, the nucleus.
(a)
53.
Two German biologists, did experiments to know what kind of living things had cells. They came up with a theory that all plants and animals are made up of cells.
(a)
54.
The _____ is the period from the beginning of one ell division to the beginning of the next cell division.
a)
mitosis
b)
cell cycle
c)
meiosis
d)
interphase
55.
It is an active time between cell divisions, during this process, the cell grows , makes proteins, prepares for cell division and carries out other processess vital for the cell's proper functionin
a)
mitosis
b)
cell cycle
c)
meiosis
d)
interphase
56.
It is the process whereby the division of the nucleus and the cytoplasm and the duplication of the chromosomes result in two identical daughter cells.
a)
mitosis
b)
cell cycle
c)
meiosis
d)
interphase
57.
During this stage of mitosis, the nuclear membrane begins to disappear; the thin threads of chromatin shorten and thicken to form chromosomes.
a)
prophase
b)
anaphase
c)
metaphase
d)
telophase
58.
During this stage of mitosis, the chromosomes migrate and line up along the middle of the cell.
a)
prophase
b)
anaphase
c)
metaphase
d)
telophase
59.
During this stage of mitosis, the chromosomes are halved, or split into their chromatids, through the pulling motion of the spindle fibers and centrioles.
a)
prophase
b)
anaphase
c)
metaphase
d)
telophase
60.
This is the last stage of mitosis, which results in the formation of two cells.
a)
prophase
b)
anaphase
c)
metaphase
d)
telophase
61.
A chromosome typically consists of two identical halves called _____
a)
chromatids
b)
meiosis
c)
spindle fibers
d)
cytokinesis
62.
The long threads called ______ , form between the cetrioles.
a)
chromatids
b)
meiosis
c)
spindle fibers
d)
cytokinesis
63.
The cytoplasm divides in half in a process called ______, pinching the cell into two new cells
a)
chromatids
b)
meiosis
c)
spindle fibers
d)
cytokinesis
64.
Reproductive cells are formed through a process called _______.
a)
chromatids
b)
meiosis
c)
spindle fibers
d)
cytokinesis
65.
It involves the fusion of the male and female gametes, forming a zygote; it requires two parents thus the offspring are not an exact copy of either of the parents.
a)
Vegetative propagation
b)
sexual reproduction
c)
asexual reproduction
d)
tubers
66.
It involves only one parent, thus the offspring of an organism that reproduces in this is its exact copy.
a)
Vegetative propagation
b)
sexual reproduction
c)
asexual reproduction
d)
tubers
67.
It is the development of a new plant from a root, stem, or leaf of a parent plant.
a)
Vegetative propagation
b)
sexual reproduction
c)
asexual reproduction
d)
tubers
68.
________, such as potatoes, are fleshly underground storage structures composed of enlarged parts of the stem.
a)
Vegetative propagation
b)
sexual reproduction
c)
asexual reproduction
d)
tubers
69.
It is the process in which a small section of a plant stem is removed and planted.; this method is very common in the production of new flowering plants, bushes and even fruit trees.
a)
cutting
b)
budding
c)
fission
d)
grafting
70.
It is a process of joining the stem of one plant to the stem of another plant that has a similar characteristic.
a)
cutting
b)
budding
c)
fission
d)
grafting
71.
During _____, an individual animal cell divides into two, and each develops into a mature organism and an example of this is the Amoeba.
a)
cutting
b)
budding
c)
fission
d)
grafting
72.
In ______, the parent organism produces offspring by growing a tiny replica of itself as an outgrowth called bud on some parts of its body.
a)
cutting
b)
budding
c)
fission
d)
grafting
73.
In ______, a part of the parent organism separates from its body.; the separated part soon develops into an independent adult individual.
a)
cross-pollination
b)
fragmentation
c)
self-pollination
d)
pollination
74.
This is the transfer of pollen grains from the stamen to the stigma through various vectors such as wind or insects.
a)
cross-pollination
b)
fragmentation
c)
self-pollination
d)
pollination
75.
When the pollen is carried from the stamen to the stigma of the same plant, the process is known as ______
a)
cross-pollination
b)
fragmentation
c)
self-pollination
d)
pollination
76.
When the pollen is carried to the stigma of another plant, the process is known as _______
a)
cross-pollination
b)
fragmentation
c)
self-pollination
d)
pollination
77.
In plants, once the pollen lands on the stigma, a pollen tube grows into the stigma and down the style into the ovary.
a)
zygote
b)
fertilization
c)
external fertilization
d)
internal fertilization
78.
In sexual reporduction, the sperm cell of the male organism fuses with the egg cell of the female organism in a process called ______.
a)
zygote
b)
fertilization
c)
external fertilization
d)
internal fertilization
79.
The fertilized egg cell is called the ____
a)
zygote
b)
fertilization
c)
external fertilization
d)
internal fertilization
80.
If fertilization occurs inside the female's body, it is called ______
a)
zygote
b)
fertilization
c)
external fertilization
d)
internal fertilization
81.
On the other hand, if fertilization occurs outside the organism's body, it is called ____
a)
zygote
b)
fertilization
c)
external fertilization
d)
internal fertilization
82.
The process that produces sex cells is called ____
a)
meiosis
b)
heredity
c)
mitosis
d)
fertilization
83.
_____ produces cells with half the number of chromosomes as the parent cell.
a)
meiosis
b)
pollination
c)
mitosis
d)
fertilization
84.
Potato plants reporduce asexually through _____
a)
fertilization
b)
pollination
c)
tubers
d)
runners
85.
The process of sexual reproduction in plants begins with _____.
a)
fertilization
b)
pollination
c)
vegetative reproduction
d)
cell division
86.
Reproduction in all kinds of organisms is based on a process called ______.
a)
cell respiration
b)
cell inhalation
c)
cell photsynthesis
d)
cell division
87.
The period between one mitosis and the next is known as ______.
a)
metaphase
b)
interphase
c)
anaphase
d)
telophase
88.
During _____ the chromosome pairs line up along the equator of the cell.
a)
metaphase
b)
interphase
c)
anaphase
d)
telophase
89.
When an offspring is produced by only one parent, _______
a)
the parent undergoes fertilization
b)
the offspring is the result of cell division
c)
mitosis
d)
the process is called asexual reproduction
90.
Two identical daughter nuclei are produced during _____.
a)
cytokinesis
b)
meiosis
c)
mitosis
d)
interphase
91.
It is a type of cell division that produces sex cells with half as many chromosomes as body cells. Reproductive cells are formed through this process.
a)
cytokinesis
b)
meiosis
c)
mitosis
d)
interphase
92.
Human reproductive cells have only (a) chromosomes.
93.
Such as strawberries and bulbs like those in onions. The advantage of these kinds of asexual reproduction, which can occur either naturally or artificially.
a)
fertilization
b)
pollination
c)
tubers
d)
runners
94.
Humans have about (a) different kinds of cells.
95.
These are groups of similar cells that perform specific functions.
a)
tissues
b)
organ
c)
heart
d)
organ system
96.
An _____ is a group of different tissues working together to perform certain task.
a)
tissues
b)
organ
c)
heart
d)
organ system
97.
The _____ is made up of muscles, nerves and connective tissues that function together to pump blood throughout the body
a)
tissues
b)
organ
c)
heart
d)
organ system
98.
A group of organs that work together to perform certain functions is known as an _______.
a)
tissues
b)
organ
c)
heart
d)
organ system
99.
A _______ is the combination of all its systems, organs, tissues and cells.
a)
single living organism
b)
organ
c)
compex organism
d)
organ system
100.
A ______ is comprised of a combination of multiple organ system
a)
single living organism
b)
organ
c)
compex organism
d)
organ system
101.
A (a) is a plant organ that is composed of tissues that trap light energy to make food.
102.
Individuals living together are called a _____ and all members of this are of the same species.
a)
population
b)
community
c)
ecosystem
d)
biomes
e)
biosphere
103.
All the different populations that live in one environment make a ______
a)
population
b)
community
c)
ecosystem
d)
biomes
e)
biosphere
104.
A group of organisms living in a particular area and interacting with one another, together with their nonliving environment, is called an _____.
a)
population
b)
community
c)
ecosystem
d)
biomes
e)
biosphere
105.
Groups of ecosystems that are found worldwide are called _______
a)
population
b)
community
c)
ecosystem
d)
biomes
e)
biosphere
106.
_______ is the highest level of complexity in the living world.
a)
population
b)
community
c)
ecosystem
d)
biomes
e)
biosphere
107.
The living parts of the environment like plants, animals are called the ______
a)
biotic factors
b)
abiotic factors
c)
habitat
d)
niche
108.
The nonliving parts of the environment like water, soil, sunlight, temperature and wind are called the ______.
a)
biotic factors
b)
abiotic factors
c)
habitat
d)
niche
109.
Each member of a community has a certain place where it lives and this place in which an organism lives is called a ______.
a)
biotic factors
b)
abiotic factors
c)
habitat
d)
niche
110.
In addition to having a habitat, each organism in a community plays a particular role and the role of an organism in its community or environment is called ____
a)
biotic factors
b)
abiotic factors
c)
habitat
d)
niche
111.
The (a) is the ultimate source of energy for nearly all of Earth's ecosystem.
112.
An organism that generates energy by converting gthe sun's energy , or solar energy, into energy-rich compounds is called an ______
a)
autotroph
b)
heterotroph
c)
habitat
d)
niche
113.
An organism that consumes other organisms to obtain energy is called a _____
a)
autotroph
b)
heterotroph
c)
habitat
d)
niche
114.
Green plants trap light energy and change it into chemical energy during the food-,making process known as (a)
115.
Because they make their own food, green plants are called _____
a)
producers
b)
consumers
c)
food chain
d)
decomposers
e)
food web
116.
Organisms that rely on other organisms for food are called ____
a)
producers
b)
consumers
c)
food chain
d)
decomposers
e)
food web
117.
A ______ models the flow of energy through organisms in a community.
a)
producers
b)
consumers
c)
food chain
d)
decomposers
e)
food web
118.
________ are organisms that feed on wastes and dead organic matter, use some of the dead materials for food and return the rest to the soil.
a)
producers
b)
consumers
c)
food chain
d)
decomposers
e)
food web
119.
When several food chains are interlocked, a _____ is formed; it includes all the food chains in an ecosystem that are connected together.
a)
producers
b)
consumers
c)
food chain
d)
decomposers
e)
food web
120.
A ____ is a hierarchical level in an ecosystem that consists of organisms whose energy sources are the same number of steps away from the primary source of energy.
a)
trophic level
b)
primary consumers
c)
food chain
d)
decomposers
e)
food web
121.
Consumers that feed directly on producers, make up the second trophic level and obtain only 10% of the energy available in the producers
a)
trophic level
b)
primary consumers
c)
food chain
d)
decomposers
e)
food web
122.
A primary consumer that eats only plants is called a ______
a)
herbivore
b)
carnivore
c)
omnivore
d)
scavenger
123.
A _____ is an organism that eats only meat.
a)
herbivore
b)
carnivore
c)
omnivore
d)
scavenger
124.
It is an organism that eats both plants and meat.
a)
herbivore
b)
carnivore
c)
omnivore
d)
scavenger
125.
A consumer that feeds on the tissues of dead animals is called a ______
a)
herbivore
b)
carnivore
c)
omnivore
d)
scavenger
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