Author: Biology Junction Team

Evolution Quiz

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Evolution
    1. In biological terms, what is a species? a group of organisms that are similar in form and structure
      a group of organisms that can interbreed
      a group of organisms that share common features
      a group of organisms that have live in the same habitat
    2. What is the Scala Naturae? an idea proposed by Darwin that suggests that all organisms share a common ancestor
      an idea proposed by Plato that suggests organisms are all evolving toward an ideal form
      an idea proposed by Aristotle that suggests that all organisms fit into an orderly scheme
      an idea proposed by Wallace that suggests that organisms change over time
    3. Creationism is not accepted as a valid scientific theory because: it violates the scientific principle of natural causality
      it doesn’t offer a model to explain the diversity of life on earth
      it cannot be disproven
      all of these

birds

    1. The picture of the finches is used to illustrate: phylogeny of finches
      change over time
      specialization of beaks for different diets
      natural selection
    2. Which of the following was not an observation made by Darwin on his voyages: penguins use wings to paddle instead of fly
      snakes have rudimentary hind limbs
      the earth is very old
      islands had species that did not exist on the mainland

bones

    1. The image illustrates: vestigial structures
      homologous structures
      the fossil record
      natural selection
    2. Which of the following is an example of artificial selection: a panda’s thumb
      the breeding of dogs
      the galapagos finches
      a giraffe’s neck
    3. According to the theory of evolution by natural selection, which of the following is true: random mating is necessary for evolution to occur
      variation does not exist between members of the same species
      populations will change to better fit their environment
      individuals will adapt to their environment
    4. Which of the following are assumptions made with regards to the Theory of Evolution by Natural selection organisms compete with each other to survive
      variations exist among organisms
      not all organisms that are born survive to reproduce
      all of these

whale

    1. The image illustrates which of the following: artificial selection
      acquired characteristics
      homologous structures
      vestigial structures
    2. A panda’s thumb is considered an evolutionary contrivance because: it is assembled from wrist bones, and imperfect
      it is perfectly structured to grab leaves
      it is an structure that has no use
      none of these
    3. Which of the following outcomes would you predict for a population of bacteria exposed to a new antibiotic. over many generations, the bacteria would become resistant to the antibiotic
      over a few generations, the bacteria would evolve into Archaebacteria
      over a few generations, the bacteria would become extinct
      over many generations, the bacteria would become more susceptible to the antibiotic
    4. Which of the following is an example of convergent evolution: whales and sharks have similar body designs
      bees and hummingbirds have similar body designs
      bats and birds have similar body designs
      all of these
    5. Why is evolution called the “unifying theory of biology” because it explains the diversity of life on the planet
      because it serves as a model to predict how organisms will change
      it serves as a model to interpret relationships between organisms on the planet
      all of these

moths

  1. The image illustrates how peppered moths are related to other moths
    how peppered moths adapted to a changing environment
    how peppered moths became extinct
    how peppered moths became two species

Check Answers

Ecology Quiz

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Ecology
  1. Which two biomes are the most similar with regard to rainfall?
    tundra & taiga
    tundra & desert
    rain forest & savanna
    temperate forest & prairie
  2. Which biome is characterized by a layer of permafrost?
    taiga
    savanna
    chaparral
    tundra
  3. Biodiversity is greatest in which biome?
    taiga
    polar
    rain forest
    savanna
  4. The eastern portion of the United States is dominated by what biome?
    temperate forest
    desert
    taiga
    prairie
  5. In which biome of Africa would you find lions, giraffes, and elephants?
    savanna
    chaparral
    desert
    tropical rain forest
  6. All the different species of an ecoystem are referred to as the:
    biome
    community
    population
    abiotic factors
  7. Which of the following would represent an ecosystem?
    A lake
    A fish tank
    A prairie
    all of these
  8. All the nonliving parts of an ecosystem are referred to as:
    the community
    biotic factors
    abiotic factors
    biomes
  9. Which of the following would be a biotic factor in an ecosystem?
    bacteria
    soil
    temperature
    rainfall
  10. The types and numbers of species in a given area is most greatly determined by the area’s:
    biotic factors
    precipitation
    climate
    biodiversity

Score =
Correct answers:

Decimals, Fractions and Percentages

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Decimals, Fractions and Percentages

Decimals, Fractions and Percentages are just different ways of showing the same value:

A Half can be written…
As a fraction:
1/2
As a decimal:
0.5
As a percentage:
50%

 

A Quarter can be written…
As a fraction:
1/4
As a decimal:
0.25
As a percentage:
25%

Here, have a play with it yourself:

View Larger

Example Values

Here is a table of commonly occuring values shown in Percent, Decimal and Fraction form:

Percent Decimal Fraction
1% 0.01 1/100
5% 0.05 1/20
10% 0.1 1/10
12½% 0.125 1/8
20% 0.2 1/5
25% 0.25 1/4
331/3% 0.333… 1/3
50% 0.5 1/2
75% 0.75 3/4
80% 0.8 4/5
90% 0.9 9/10
99% 0.99 99/100
100% 1
125% 1.25 5/4
150% 1.5 3/2
200% 2

 

Conversions

 

From Percent to Decimal

To convert from percent to decimal: divide by 100, and remove the “%” sign.

The easiest way to divide by 100 is to move the decimal point 2 places to the left. So:

From Percent To Decimal
move the decimal point 2 places to the left, and remove the “%” sign.

 

From Decimal to Percent

To convert from decimal to percent: multiply by 100, and add a “%” sign.

The easiest way to multiply by 100 is to move the decimal point 2 places to the right. So:

From Decimal To Percent
move the decimal point 2 places to the right, and add the “%” sign.

 

From Fraction to Decimal

The easiest way to convert a fraction to a decimal is to divide the top number by the bottom number (divide the numerator by the denominator in mathematical language)

Example: Convert 2/5 to a decimal

Divide 2 by 5: 2 ÷ 5 = 0.4

Answer: 2/5 = 0.4

 

From Decimal to Fraction

To convert a decimal to a fraction needs a little more work.

Example: To convert 0.75 to a fraction

Steps Example
First, write down the decimal “over” the number 1 0.75 / 1
Then multiply top and bottom by 10 for every number after the decimal point (10 for 1 number, 100 for 2 numbers, etc) 0.75 × 100 / 1 × 100
(This makes it a correctly formed fraction) = 75 / 100
Then Simplify the fraction 3 / 4

 

From Fraction to Percentage

The easiest way to convert a fraction to a percentage is to divide the top number by the bottom number. then multiply the result by 100, and add the “%” sign.

Example: Convert 3/8 to a percentage

First divide 3 by 8: 3 ÷ 8 = 0.375,
Then multiply by 100: 0.375 x 100 = 37.5
Add the “%” sign: 37.5%

Answer: 3/8 = 37.5%

 

From Percentage to Fraction

To convert a percentage to a fraction, first convert to a decimal (divide by 100), then use the steps for converting decimal to fractions (like above).

Example: To convert 80% to a fraction

Steps Example
Convert 80% to a decimal (=80/100): 0.8
Write down the decimal “over” the number 1 0.8 / 1
Then multiply top and bottom by 10 for every number after the decimal point (10 for 1 number, 100 for 2 numbers, etc) 0.8 × 10 / 1 × 10
(This makes it a correctly formed fraction) = 8 / 10
Then Simplify the fraction 4 / 5

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DNA QUIZ

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DNA QUIZ

1. Name this structure.
deoxynucleic acid
deoxyribonucleic acid
denatured ribonucleic acid
deoxoribonuclear acid2. The process by which RNA is made from DNA:
synthesis
translation
transcription
replication

3. Adenine always pairs with:
thymine
cytosine
guanine
ribose

4. The “rungs” of the DNA ladder are made of:
phosphates and hydrogen
glucose and sugars
sugars and phosphates
base pairs

5. The DNA molecule is held together by:
magnetism
glucose
glue
hydrogen bonds

6. The process by which DNA makes a copy of itself is called:
synthesis
replication
transcription
translation

7. A gene is:
a segment of DNA that codes for a protein
a set of homologous chromosomes
a molecule within DNA
a type of pants

8. The twisted ladder shape of DNA is called a:
hydrogen twist
deoxyribose flip
double helix
double membrane

9. The sugar found in DNA is:
equal
deoxyribose
ribose
glucose

10. Which of the following takes the genetic code to the cytoplasm:
DNA
deoxyribose
tRNA
mRNA

11. The three nucleotide sequence on RNA is called a:
tRNA
codon
triplet
gene

12. Three nucleotides code for:
1 amino acid
3 amino acids
1 protein
3 proteins

13. RNA differs from DNA in that:
it has a different kind of sugar
it is single stranded
it has uracil
all of these

14. DNA is called the “blueprint of life” because:
it is like a fingerprint
it has a blue color
it contains the plans for building an organism
it can relay messages to other molecules

15. The two men who established the structure of DNA were:


Frederick and Alvers
Watson and Crick
Berkely and Fry
Darwin and Lamarke

Score =
Correct answers:

Quiz – Biochemistry

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Biochemistry Quiz
1. All of the following are carbohydrates EXCEPT:
starch
glycogen
chitin
cholesterol2. The structure contains which functional group
aldehyde
ketone
amino
carboxyl

3. Fatty acids that are unsaturated have:
an amino group
a double bond
an excess of protons
a carboxyl group

4. The structure below is a:


monosaccharide
disaccharide
lipid
polymer

5. Which of the following can have a quaternary structure?
fatty acid
protein
polysaccharide
DNA

6. An organic compound is one that:
contains carbon
is slightly acidic
forms long chains
is soluble in water

7. Which of the following elements is the LEAST abundant in living organisms?
oxygen
nitrogen
phosphorous
sodium

8. Which of the following is used in PET scans?
uranium
ions
isotopes
steroids

9. Carbon can form ___ separate bonds with other elements?
1
2
3
4

10. The cohesion of water is caused by:
ionic bonds
hydrophobic compounds
hydrogen bonds
covalent bonds

Score =
Correct answers: