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B5 OCR Combined

Total questions: 141

Worksheet time: 3hrs 33mins

Name
Class
Date
1.

The hardened remains of a living thing that died long ago.

a)

fossil

b)

extinct

c)

endangered

d)

minerals

2.

Why are there more animal fossils than plant fossils?

a)

Animals are smaller than plants.

b)

Plants have harder bodies than animals.

c)

Plans have softer bodies than animals.

d)

Animals eat plants.

3.

Which is an imprint fossil?

a)

bone

b)

a cast

c)

a trace fossil

d)

original remains

4.

Which type of rock are most fossils found?

a)

sedimentary rock

b)

metamorphic rock

c)

igneous rock

d)

fossils

5.

If a scientist found a fish fossil in the desert, what can they infer?

a)

An animal ate the fish.

b)

The water covered the area long ago.

c)

Today's fish looks the same

d)

The fish is endangered.

6.

What replaces the wood of a once-living thing to form petrified wood?

a)

amber

b)

cast

c)

mold

d)

minerals

7.

This type of fossil is tree sap hardened and replaced by minerals.

a)

Petrified wood

b)

Imprint

c)

Amber

d)

Mold

8.

What type of fossil is pictured here?

a)

Mold fossil

b)

Trace fossil

c)

Cast fossil

d)

Body fossil

9.

What type of fossil is pictured here?

a)

Forest fossil

b)

Trace fossil

c)

Cast fossil

d)

Body fossil

10.

What type of fossil is pictured here?

a)

Mold fossil

b)

Trace fossil

c)

Cast fossil

d)

Body fossil

11.

Which organism is most likely to become fossilized in the next million years?

a)

a butterfly

b)

a giraffe

c)

an octopus

d)

an earthworm

12.

Which type of fossil preservation is a thin carbon silhouette of the original organism?

a)

cast     

b)

carbon film    

c)

mold

d)

petrified

13.

A fossil formed when minerals replace all or part of an organism is called a

a)

mold   

b)

petrified fossil

c)

cast

d)

trace fossil

14.

What is a copy of a fossil produced by filling a mold with sediments or crystals?

a)

mold

b)

cast

c)

petrified fossil

d)

carbon film

15.

change in the DNA sequence

a)

protein

b)

error

c)

mutation

d)

mutagen

16.

one nucleotide is preplacced with a different nucleotide

a)

addition

b)

substitution(point)

c)

deletion

d)

inversion

17.

when one or more nucleotides are deleted

a)

substitution

b)

addition

c)

remake

d)

deletion

18.

when one or more nucleotides are inserted

a)

addition

b)

deletion

c)

insertion

d)

remake

19.

when a portion of the DNA is shifted in one direction due to a deleition or insertion

a)

frameshift

b)

gene

c)

deletion

d)

substitution

20.
What mutation has occurred here? 
T-G-A-C-C-A
T-G-A-G-C-A
a)
Substitution
b)
Deletion
c)
Insertion
d)
Frameshift 
21.
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
a)
Substitution
b)
Deletion
c)
Insertion
d)
Inversion
22.

When a nitrogen base (nucleotide) is removed from a gene, this is called a ________ mutation.

a)

removal

b)

deletion

c)

substitution

d)

insertion

23.

In nitrogen base pairs, C always pairs with...

a)

A

b)

T

c)

G

d)

C

24.

Each rung of the DNA ladder is made of

a)

a pair of nitrogen bases

b)

a single nitrogen base

c)

a pair of carbon bases

d)

a single carbon base

25.

Which of the following best describes how genes influence an organism's traits?

a)

Genes control the production of proteins, which affect the organism's traits.

b)

DNA controls the production of lipids, which determine the organism's traits.

c)

Carbohydrates control the production of genes, which affects the organism's traits.

d)

Genes control the development of sister centrioles, which determine the organism's traits.

26.

Genetic mutations can be...

a)

beneficial, harmful, or neutral

b)

beneficial only

c)

harmful only

d)

neutral only

27.

In nitrogen base pairs, A pairs with...

a)

A

b)

T

c)

G

d)

C

28.

Mutations always have a HUGE effect on our phenotype

a)

True

b)

False

29.

The two kinds of frameshift mutations are:

a)

Deletion and insertion

b)

Substitution and silent

30.

The change in strand 1 to form strand 2 is most similar to what type of mutation?

a)

Insertion

b)

Deletion

c)

Substitution

d)

Silent

31.

What is the difference between sexual and asexual reproduction?

a)

Asexual produces genetically different offspring. Sexual produces genetically identical.

b)

Sexual produces offspring with fewer chromosomes. Asexual produces more.

c)

Sexual produces genetically different offspring. Asexual produces genetically identical.

d)

Sexual reproduction is quicker than asexual.

32.

What is the purpose of meiosis?

a)

To create daughter cells.

b)

To create identical cells.

c)

To create offspring that are genetically identical.

d)

To create a faster process of reproduction.

33.

Brain Check! What part of the plant travels from the parent plant to the other plant for fertilization?

a)

Stamen

b)

Pollen

c)

Pistil

d)

Style

34.

The right sequence in sexual reproduction of plants is _______,______&_______.

a)

Fertilization, pollination & germination.

b)

pollination, germination & fertilization.

c)

pollination, fertilization & germination.

d)

Germination, pollination & fertilization.

35.

The pollen tube contains two female nuclei.

a)

True

b)

False

36.

The pollen tube extends till it reaches the ovule inside the ovary through the _______.

a)

Zygote

b)

Male nuclei

c)

Micropyle

d)

Style

37.

The zygote undergoes successive divisions to form _____ which grows forming _____.

a)

New plant _ embryo

b)

Ovule _ new plant

c)

Embryo _ zygote

d)

Embryo _ new plant

38.

The wall of the ovary develops to ______ while the ovule develops to _____.

a)

Pericarp _ seed

b)

Pericarp _ seed caot

c)

Fruit _ seed

d)

Seed coat _ fruit

39.

All are natural vegetative reproduction except ______.

a)

Rhizomes

b)

Cutting

c)

Tubers

d)

Offshoits

40.

The tuber is a horizontal root as potatoes or a terrestrial stem as sweet potatoes.

a)

False

b)

True

41.

It's common for the cut to be a branch carrying many buds.

a)

True

b)

False

42.

In grafting the ____ is attached to the _____ to feed on its juice.

a)

Stock _ scion

b)

Scion _ stock

c)

Scion _ cut

d)

Stock _ cut

43.

The grafting can occurs between _____ & _____ .

a)

Oranges & naring

b)

Apples & apricots

c)

Peaches & pears

d)

Orange & apples

44.

________ is considered from the important modern ways to increase crops.

a)

Cutting

b)

Grafting

c)

Tissue culture

d)

Layering

45.

_____,_____& _______ are examples of artificial vegetative reproduction.

a)

Cutting, layering & tissue culture

b)

Grafting, rhizomes & tubers.

c)

Offshoots, grafting & bulbs.

d)

Cutting, layering & corms

46.

Type of plant reproduction which the plant can reproduce without flowers.

a)

Sexual reproduction

b)

Fertilization

c)

Pollination

d)

A sexual reproduction

47.

Match the following

a)

Natural Selection

1.

Process where traits and organisms that are best adapted to the environment survive and reproduce.

b)

Adaptation

2.

A variation in a plant or animal that increases it chance of survival in its environment.

c)

Development

3.

The process by which animals and plants grow and develop.

d)

Diversity

4.

The variation of life forms present in different ecosystems.

e)

Species

5.

Organisms that can reproduce, have similar characteristics, and have a common gene pool.

48.

Match the following

a)
1.

Diversity

b)
2.

Natural Selection

c)
3.

Adaptation

d)
4.

Species

e)
5.

Development

49.

A process in nature where traits and organisms that are best adapted to the environment survive and reproduce.

(a)  

50.

A variation in a plant or animal that increases it chance of survival in its environment.

(a)  

51.

The process by which animals and plants grow and develop.

(a)  

52.

The evolutionary tendency of organisms with a common ancestor to develop different adaptations or traits and become less related.

(a)  

53.

A taxonomic category referring to organisms that can reproduce with one another, have similar characteristics, and have a common gene pool.

(a)  

54.

Draw your own example of natural selection.

55.

Draw an example of an adaptation.

56.

Create a definition for diversity in your own words. Be sure to use a complete sentence.

(You can start with: Diversity is...)

4 lines
57.
Which of the following would represent a sudden environmental change?
a)
Wildfire
b)
Global Warming
c)
Competition for food
d)
Desert encroachment 
58.
Survival of the Fittest and Evolution were proposed by what scientist?
a)
Charles Darwin
b)
Albert Einstein
c)
Steven Hawking
d)
Isaac Newton
59.
Where the better adapted organisms survive to pass traits along to offspring.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artifical Selection
60.
What is the advantage of having different shaped beaks?
a)
To look different from other species.
b)
To be able to eat the food readily available in the environment.
c)
To protect itself against predators.
d)
To protect itself against prey.
61.
Why are advantageous traits more likely to be passed onto offspring?
a)
Because they are more likely to survive and reproduce.
b)
Because they come from dominant alleles.
c)
Because they come from recessive alleles.
d)
Because the trait is an acquired phenotype.
62.
Mutations are a change in what?
a)
DNA
b)
tRNA
c)
genotype
d)
phenotype
63.
Where humans have bred organisms together based on traits we like.
a)
Evolution
b)
Natural Selection
c)
Extinction 
d)
Artificial Selection
64.
Genetic differences between organisms of the same species
a)
Variation
b)
Adaptation
c)
Behavior
d)
Environment
65.
Structures with the same parts have different functions; suggests that organisms share a common ancestry
a)
vestigial structures
b)
homologous structures
c)
adaptive radiation
d)
fossil
66.
Study of embryos of various organisms to show a common ancestor because of similarities in development
a)
natural selection
b)
embryology
c)
speciation
d)
evolution
67.
Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as
a)
vestigial structures
b)
analogous structures
c)
homologous structures
d)
fossil structures
68.
A fossil of an extinct dinosaur is found and the anatomy of the fossil shows similarities to that of a bird. What could this mean?
a)
This is purely by chance and isn't significant
b)
The extinct dinosaur and modern bird share a common ancestor
c)
All dinosaurs evolved into birds and that's why there aren't any dinosaurs alive today
d)
Dinosaurs choose to fly, and evolved into birds to escape predation and capture food
69.
Which of the following organisms the kingdom animalia are not closely related?
a)
mouse and hagfish
b)
mouse and lizard
c)
mouse and pigeon
d)
mouse and chimp
70.
Two organisms that are closely related would have
a)
very similar DNA sequence
b)
exactly the same DNA sequences
c)
no proteins in common
d)
completely different DNA sequence
71.
Which of the following are examples of evidence for evolution?
a)
Fossils and Cellular Structure
b)
Biological Structures 
c)
Genetics/DNA
d)
All of the Above
72.
True or False?
Generations of a species that are farther apart from each other look the most different.
a)
True
b)
False
73.

An example of a physical/structural adaptation is...

a)

a turtle hiding inside its shell

b)

The spikes on a porcupine fish

c)

a rabbit burrowing underground

d)

a viper biting when threatened

74.
An example of a behavioral adaptation is
a)
The long neck of a giraffe
b)
Penguins huddling together for warmth
c)
A camel's hump used to store water
d)
A polar bear's white fur used for camouflage
75.
An animal's color or pattern that helps it blend into its surroundings
a)
Environment 
b)
Mimicry
c)
Camouflage
76.

A monkey has a long tail to help it swing from branch to branch.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

77.

A squid will squirt black ink (born with this instinct) at predators when frightened.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

78.

A lion has pointed teeth to help it tear meat off of the bone.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

79.

A black bear hibernates during the winter months.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

80.

A penguin is white on its belly and black on its back so it harder to see underwater from above and below.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

81.

An owl is mostly nocturnal meaning it hunts and is active at night.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

82.

Parrots have special feet, with two toes on the front and back to help them cling to branches.

a)

Behavioral Adaptation

b)

Physical/Structural Adaptation

83.
The slight differences in stripe patterns in a zebra population is known as 
a)
Adaptation
b)
Variation
84.
When an animal looks like another animal it is called ______________.
a)
camouflage
b)
mimicry
c)
warning coloration
d)
protective resemblance
85.
A Viceroy butterfly looking like a bright colored poisonous Monarch butterfly is an example of __________.
a)
camouflage
b)
mimicry
c)
warning coloration
d)
protective resemblance
86.
The colors & patterns on a turtles shell help it blend in with the forest floor.  This is:
a)
hibernation.
b)
behavior.
c)
migration.
d)
camouflage.
87.
The praying mantis looks very much like a blade of grass. What is it called when animals look like other animals or plants?
a)
camouflage
b)
mimicry
c)
locomotion
d)
hibernation
88.
Instinct or Learned Behavior?
Dogs pant when they are hot. 
a)
Instinct
b)
Learned
89.
When a cheetah teaches it's cub to hunt, this is called a  __________. 
a)
learned behavior
b)
predator
c)
physical characteristic
d)
migration
90.
What are adaptations?
a)
traits that help an organism to survive and reproduce
b)
traits that help an organism hide
c)
traits that help an organism to seek protection
d)
traits that help an organism to see.
91.

The ability of an organism to survive and reproduce.

a)

fitness

b)

energy

c)

agility

d)

instinct

92.

Variations of traits within the same species, are caused by...

a)

mutations in genes

b)

dominant alleles

c)

recessive alleles

d)

random chance

93.
Where in the cell can the genetic material (DNA) be found?
a)
nucleus
b)
nucleolus
c)
cytoskeleton
d)
golgi
94.
How many chromosomes do humans have?
a)
46-- 23 from mom, 23 from dad
b)
22--11 from mom, 11 from dad
c)
10-- 5 from mom, 5 from dad
d)
23
95.
Before a cell can divide, what must happen?
a)
Nothing, it is always ready to divide
b)
The number of chromosomes must be cut in half
c)
The number of chromosomes must double
d)
The number of chromosomes must triple.
96.
When a cell divides, what do we call the 2 new cells?
a)
mother cells
b)
father cells
c)
daughter cells
d)
son cells
97.
What type of cells may never undergo mitosis and make new cells?
a)
blood cells
b)
skin cells
c)
nerve cells
d)
stomach cells
98.
In mitosis, the two resulting cells are
a)
different from the starting cell and identical to each other.
b)
different from the starting cell and different from each other.
c)
identical to the starting cell and different from each other.
d)
identical to the starting cell and identical to each other.
99.
When you start with 1 cell, at the end of mitosis, how many identical cells will you have?
a)
1
b)
2
c)
3
d)
4
100.
Which of the following does not occur by the process of mitosis?
a)
growth
b)
production of gametes
c)
repair
d)
development in the embryo
101.

if a body cell normally has 24 chromosomes how many will it have at the end of mitosis.

a)

6

b)

12

c)

24

d)

48

102.
If a cell has 24 chromosomes at the beginning of meiosis how many chromosomes will it have at the end of meiosis?
a)
6
b)
12
c)
24
d)
the number varies with the species.
103.
What creates 4 different cells?
a)
Mitosis 
b)
Meiosis
104.
The result of meiosis is:
a)
two diploid cells
b)
two haploid cells
c)
four diploid cells
d)
four haploid cells
105.
products of meiosis are genetically
a)
different
b)
identical
106.
Most of the cells in the human body are produced by
a)
mitosis
b)
meiosis
107.

Chromosomes condense

a)

Mitosis

b)

Meiosis

c)

Both

108.

forms gametes

a)

Mitosis

b)

Meiosis

c)

Both

109.

for growth and repair

a)

Mitosis

b)

Meiosis

c)

Both

110.

produces non-identical cells

a)

Mitosis

b)

Meiosis

c)

Both

111.

The picture depicts what stage of meiosis?

a)

(A) Prophase 1

b)

(B) Anaphase 1

c)

(C) Metaphase 2

d)

(D) Metaphase 1

e)

(E) Telophase 1

112.

The picture depicts what phase of meiosis?

a)

(A) Metaphase 2

b)

(B) Prophase 1

c)

(C) Metaphase 2

d)

(D) Anaphase 2

e)

(E) Prophase 2

113.
How many stages are in mitosis?
a)
1
b)
2
c)
3
d)
4
114.

What part of the cell cycle is considered interphase? Select all that apply.

a)

G1

b)

G2

c)

S

d)

M

115.

Which statement is NOT true about interphase?

a)

It's the longest phase of the cell cycle

b)

During interphase organelles duplicate

c)

During interphase, DNA replicates

d)

During interphase, the chromatin condenses into chromosomes.

116.

In this phase, the cell is preparing for the cell division in the mitotic stage.

a)

Go

b)

G1

c)

G2

d)

S

117.

In the eukaryotic cell, it is the longest stage of the cell cycle and generally its function is to prepare the cell to division process.

a)

Interphase

b)

Mitotic phase

c)

Synthesis Phase

d)

All of the above

118.

DNA replication occurs in what phase of cell cycle?

a)

Interphase

b)

Growth phase

c)

Mitotic phase

d)

Synthesis Phase

119.

The correct sequence of mitosis:

a)

metaphase, anaphase, telophase, prophase

b)

prophase, metaphase, anaphase, telophase

c)

prophase, anaphase, metaphase, telophase

d)

telophase, metaphase, prophase, anaphase

120.

Cells of organisms must go through cell division for?

a)

growth

b)

repair of damaged cells

c)

replacement of dying cells.

d)

All of these

121.
What is cytokinesis?
a)
This is when two cells merge together to make one giant cell.
b)
The stage where chromosomes migrate to the opposite ends of the cell. 
c)
The stage of the cell cycle where the rest of the cell divides after mitosis is complete.
d)
The stage in which DNA condenses into chromosomes.
122.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
123.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
124.
What does the prefix hetero- in heterozygous mean?
a)
same
b)
different
c)
dating
d)
human
125.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
126.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?
a)
Brown Hair
b)
Blonde Hair
c)
Brown and Blonde Hair
d)
Black Hair
127.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)
BB
b)
bb
c)
Bb
d)
bB
128.
The two-letter code that describes the genetic traits of an organism is called a-
a)
Phenotype
b)
Genotype
c)
Physical Appearance
d)
Intelligence
129.
The different forms of a gene are called 
a)
traits
b)
chromosomes
c)
alleles
d)
peas
130.
A section on a chromosome that has genetic information for one trait is called a
a)
gene
b)
allele
c)
phenotype
d)
genotype
131.
How much of your DNA do you inherit from your mom?
a)
10%
b)
25%
c)
50%
d)
it varies
132.
The genotype of:  bb   will have the PHENOTYPE of...
a)
black fur
b)
white fur
c)
course hair
d)
fine hair
133.
The genotype of:  AA  will have the PHENOTYPE of...
a)
albinism
b)
normal pigment
c)
albino carrier
134.
The genotype of:  Heterozygous Course Hair  will have the alleles of...
a)
Hh
b)
HH
c)
hh
135.
RR- round
rr-wrinkled
What is the phenotype for RR?
a)
wrinkled
b)
round
136.
RR- round
rr-wrinkled
What is the genotype for wrinkled?
a)
RR
b)
rr
c)
Rr
137.

The trait that will always be expressed if one copy of an allele is present.

a)

recessive

b)

dominant

c)

co-dominant

138.

The trait that will be expressed only if two copies of the allele are present.

a)

recessive

b)

dominant

c)

co-dominant

139.

Being able to roll the tongue is a dominant trait (T). Not being able to roll the tongue is a recessive trait (t). A persons genes are tt. Which trait would they have?

a)

Able to roll the tongue

b)

Not able to roll the tongue

c)

Can't tell

140.

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a recessive gene (h) from mom and a dominant gene (H) from dad?

a)

Black hair

b)

Yellow hair

c)

Can't tell

141.

Black hair (H) is a dominant gene in guinea pigs and black yellow (h) is recessive. What color hair would a guinea pig have if it got a recessive gene (h) from mom and a recessive gene (h) from dad?

a)

Black hair

b)

Yellow hair

c)

Can't tell

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