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WorksheetsBIO: Elephant Midterm Summative 2.1-2.6 Review
Total questions: 47
Worksheet time: 35mins
Which is an example of a selective pressure?
Pressure for turtles to have longer necks so they can reach their food
Pressure for turtles to eat meat
Pressure for turtles to have heads
Pressure for turtles to be herbivores
How does an elephant become tuskless?
It is killed
It is born without tusks
It decides not to have any tusks
They fall off at a certain age
Why did the percentage of tuskless elephants that were increase over time?
More elephants decided to be tuskless
The tuskless elephants were able to reproduce and pass the trait down
More elephants had their tusks fall off
The tuskless elephants all died
Why could being tuskless be a disadvantage?
Elephants don't need their tusks so there is no disadvantage
Elephants won't be able to protect themselves without them
Elephants won't look cool without tusks
Elephants have to clean their tusks
What is a gene?
a variation of a trait
sections of DNA that code for proteins
Adenine, Guanine, Thymine and Cytosine (nitrogen bases)
a chain of amino acids connected by peptide bonds
The function or the role an organism plays in the environment is called it's _
niche
habitat
ecosystem
food chain
Dividing resources in a way to minimize competition
perimeter resources
sharing and caring
survival of the fittest
niche partitioning
Using a plant gene library and animals scat in research to identify characteristics or a specific group of organisms such as grasses that herbivores eat.
DNA metabarcoding
karotyping
gel electrophoresis
gene editing
The ecological niches of three bird species are shown in the diagram. What is the advantage of each bird species having a different niche?
As more birds feed higher in the tree, available energy increases.
More abiotic resources are available for each bird.
Predators are less likely to feed on birds in a variety of locations.
There is less competition for food if each has a specific diet
What is a keystone species?
Keys and stones have nothing to do with ecology
A species that lives in or around rocks
A species that helps to hold an ecosystem together
A keystone isn't a living thing, it's just a stone
The total number of individuals in a habitat that can successfully survive with the resources it available.
limiting factors
carrying capacity
total population
event horizon
What is the carrying capacity of the following graph?
800
180
600
1000
1200
Physical or behavioral characteristics (Ex. being tuskless) that increase chances of survival/reproduction are a(n) __.
allele
evolutionary novelty
adaptation
detriment
Click on all ABIOTIC factors
water
predators
competition
bacteria
wildfire started by lightening
What is natural selection?
Organisms that are fit for an environment survive and reproduce
When only the strongest animals survive
Fast organisms will outrun their predators
favoring only large animals
Based on these results whose blood was found in the blood stain at the crime scene?
Bob
Sue
Lisa
John
No match
Limiting factors are sometimes helpful because they can keep the population from getting too large
True
False
Cell division occurs to allow for __
growth
repair
reproduction
all of the choices
What do the new daughter cells look like at the end of mitosis?
similar to the original cell
different from original cell
identical to the original cell
none of the choices is possible
Identify the stage of the cell cycle while looking at the picture.
prophase
anaphase
metaphase
telophase
What part of the Panicum grasses eaten by the herbivores undergoes mitosis?
stems
flower
roots
leaves
If a disease destroying barley plants swept through an ecosystem, what would happen to the bird population that eat barley plants?
The bird population would stay the same
The bird population would infinitely increase
The bird population would decrease
On which day did the population represented in the graph below reach the carrying capacity of the ecosystem?
Day 8
Day 11
Day 3
Day 5
Why are some elephants tuskless?
because they inherited a mutation that makes them tuskless
because having tusks makes them a target for poachers.
because they lost them after puberty
Which of the following sequences would illustrate the correct order of the phases of the cell cycle as shown in the image? (Start with Interphase)
1, 2, 4, 5, 3
4, 1, 5, 3, 2
1, 5, 3, 2, 4
4, 1, 3, 5, 2
Which of the following phases is the cell labeled “4” above currently in?
interphase
prophase
metaphase
anaphase
telophase
Variable segments of DNA, contain repeats of same sequence of nucleotides one after another
Short Tandem Repeats (STR)
Flanking Sequence
Allele
Gel Electrophoresis
Gel Electrophoresis separates molecules by __ (select all that apply).
Shape
Color
Size
Atom
Having two identical alleles at a given locus is referred to a ___.
Heterozygous
Frequency
Homozygous
Allopatric
This laboratory procedure is known as __
cloning
PCR
gel electrophoresis
chromatography
In gel electrophoresis, the largest DNA fragment will appear
closest to the starting wells
farthest from the starting wells
it depends on how many fragments there are
three quarters away from the starting wells
Name two organelles that are only found in plant cells.
Cell wall and chloroplasts
Cell wall and nucleus
Cell membrane and ribosome
Chloroplast and mitochondria
What is the clear substance that holds all the contents outside of the nucleus of a cell?
mitochondria
cell wall
nucleus
cytoplasm
This is an image of a(n)
plant cell
animal cell
bacterium
Which 2 molecules form the sides (backbone) of the DNA ladder?
deoxyribose sugar and the nucleus
deoxyribose sugar and adenine
deoxyribose sugar and a hydrogen bond
deoxyribose sugar and phosphate
Cytosine always pairs with __
Adenine
Guanine
Thymine
Uracil
Name this image.
double helix
hydrogen bond
nucleotide
carbohydrate
If a sample of 600 cells has 90 cells in some stage of mitosis, the mitotic index would be....
6.67%
0.15%
66.7%
15%
If the target sequence or restriction site is 5'GCTTCG3', what is the complementary sequence read in the 3'-5' direction?
CGAAGC
GCTTCG
GCUUCG
CGUUCG
What is a restriction enzyme?
An enzyme that cuts DNA
An enzyme that add to the DNA strand
An enzyme that breaks down lipids
An enzyme that builds proteins
How many base pairs (bp's) make up each fragment?
11
7
14
22
28
What can happen to a species over time if some of the organisms have an advantage over others?
The population will decrease
The population will slowly increase
The population will become extinct
Nothing will happen
What is a mutation?
When animals have extra legs
When a frog has 3 eyes
When RNA is upside down
When genes or DNA have been altered or changed
What is an adaptive trait?
A genetic trait that helps an organism to maximize its survival and reproduction ability
A trait that makes an animal large and strong
a trait that makes an animal weak and does not allow it to reach reproductive maturity
a poisonous plant
Where are genes located?
on the cell
on chromosomes
in the mitochondria
in the chloroplasts
What is an allele?
sections of DNA with information needed to produce different proteins
a basic protein found in eukaryotic cell nuclei that pack and order the DNA into structural units
different forms of the same gene located on the same part of a chromosome
a string-like structure located inside the nucleus of animal and plant cells
40 elephants were poached in Bomu Wildlife Reserve. 12 of these were tuskless elephants. What percentage of TUSKED elephants were poached?
.3%
30%
40%
70%
