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CRJ Biology Final Review pt. 2 Flashcards | StudBud
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CRJ Biology Final Review pt. 2
CRJ Biology Final Review pt. 2
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#biology #DNA #proteins #genetics #evolution #ecology
Flashcards
43 cards
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Practice quiz
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Host live
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Questions
43
Answers
1
3-toed sloths have green fur and move slowly and cutely. Best explanation how they evolved?
Camouflaged sloths hid from panthers and slowly had babies
Sloths mutated genes for tree bark instead of fur
Sloths are too slow and need to look like tree trunks.
Sloths are a cross between trees and sleepy people
2
Grass population has some tender, some with sharp crystals. After grass PREDATOR comes to town?
grass without seeds survives longer than grass w/crystals
tender grass will naturally mutate to have crystals
grass with crystals will speed up its metabolism
grass w/ sharp crystals will survive longer, make more seeds
3
What is missing from this graph?
a title
numbers on each axis
units on each axis
variables on each axis
4
What was the
DEpendent variable?
cm
mass
length (cm)
liquid used to soak the gummi bears
5
Scientists observed bird beaks bigger after drought. Choose best evidence for natural selection
baby birds born after the drought had larger beaks
the population of birds was larger after the drought
baby birds born after drought had smaller beaks
birds w/ were caught using plastic to enlarge their beaks
6
What limiting factors might lower the human population in the next 100 years, as in the graph?
disease
lack of water
lack of food
habitat destruction
7
where do you put the experiment's independent variable in a graph?
with the dependent variable
the x axis
the y axis
what's an axis?
8
Scientists found a live t-rex & found that its DNA is much like a modern chicken. Conclusion?
Don't go to the bathroom outside at night in the rain.
T-rex and chickens have a common ancestor
Chickens evolved directly from t-rex
T-rex and chickens have several genes in common
9
What is an example of an inherited trait that helps rabbits spread in a desert ecosystem?
the tendency to dig holes to hide and shelter in
thick fur
fearlessness around hawks
fluffy black and white coats
10
How do producers get energy?
converting food energy to ATP
Converting light energy to food energy
hunting small flies
sucking vital nutrients from other organisms
11
How much did the gummi bears in H
2
O + vinegar
grow
?
1 cm
2.5 cm
2 cm
2.5
12
We once thought option C was true, switched to B. Best evidence?
DNA showing gorillas closest to chimpanzees
Because Jesus
fossil chimps look like fossil humans
DNA evidence showing humans closest to chimpanzees
13
What limiting factors might lower the human population in the next 100 years, as in the graph?
explanations of how limiting factors work should refer to #s
explanations of limiting factors should describe graph shape
be able to explain how limiting factors lower population
practice explaining in writing
14
Why do fiddler crabs have such ginormous claws?
crabs w/ big claws run faster from predators
crabs w/ little claws are better in a fight
crabs w/ big claws use them as bottle openers
crabs w/ big claws survive more or have more baby crabs
15
Which is the best definition of a hypothesis?
an educated guess
a small theory
an idea you can test with measurement
16
What is the independent variable in this graph?
age
years
height
cm
17
Rabbits eat the same food as native kangaroos and wallabys. What effect have they had?
added biodiversity to the ecosystem by eating all the plants
unpredictable effects on ecosystem biodiversity- too complex
increased competition for food reducing native biodiversity
little change in biodiversity - rabbits replaced natives
18
How do consumers get energy?
converting food energy to ATP
shopping at the battery store
Converting light energy to food energy
stealing vital nutrients from other organisms
19
What was the
independent variable?
color
liquid used to soak the gummi bears
water
length
20
How much of the 10,000,000 kcals of energy from the grass goes into the zebras? (10%)
100,000
10,000
100,000,000
1,000,000
21
In the US, cities have forced wild animals into little isolated habitats. What results?
Small groups of animals have small gene pools - more adapt
Animals in parks are happier than in the whole scary country
Isolated animal species interbreed w/ other species
Small groups, small gene pools, more inbreeding
22
Limiting factor for the cheetah population?
over growth of zebra population
plenty of precipitation
few places to raise cubs
presence of termite mounds
23
Plants moving into a new continent will evolve differently each place - what will cause this?
# of nucleotides in plant chromosomes
number of mutations in Antarctic plants
how far apart the plants grow on the map
plant gene variation & different environments
24
Student exercise habits are the ind. variable. What is the dependent variable in this graph?
time
color
rarely exercises
heart rate
25
Why could bears hibernate?
Bears who sleep all winter have faster metabolisms
Winter sleeping bears reproduce more or survive w/ less food
Bears who sleep all winter are more likely to be hungry
Bears who don't hibernate survive more or reproduce more
26
Which treatment made the gummi bears grow the most?
Plain H2O
H2O + Vinegar
H2O + salt
H2O + baking soda
27
what is the unit of the dependent variable in this graph?
cm
age
height
years
28
What is missing from this graph?
numbers on each axis
a title
units on each axis
variables on each axis
29
Dragon researchers study dragon saliva proteins to find similarities. What can they learn?
more amino acids in common → more related dragon species
how often dragons interbreed
how fast dragons evolve
how efficient their flamethrower systems are
30
We've been spraying neighborhoods with mosquito poison for 50 yrs. Why aren't they all gone?
skeeters w/out genes to survive poison had lots of mutations
skeeters with resistance to poison were eaten more
skeeters w/out genes to survive poison: selective advantage
skeeters with genes to survive poison had lots of babies
31
How much of the 1,000,000 kcals of energy from the zebras goes into the cheetahs? (10%)
1,000
100,000
1,000,000
10,000
32
Both the cheetah and hyaena hunt zebras. Example of what carrying-capacity limiting factor?
competition
alien abduction
invasive species
disease
33
Read this carefully for the following questions. Europe is not Australia, an island continent.
Rabbits are not native to Australia.
be ready to answer questions about rabbits.
There are rabbits everywhere you go in Australia.
34
Why are there so many species adapted to live in the rainforest?
There's little light, so little available energy in forests
Rainforests have many more kinds of habitats than fields
There are more scary predators in the rainforest
There's more competition for food in rainforests
35
In the savannah food web, which trophic level has the least energy in it?
omnivores
primary consumers
mean and nasty predators
producers
36
Explain the shape of the graph of the reindeer population on the island between 1944 and 1960
decrease in birth rate of reindeer population
large increase in snowfall and fog
large decrease in number of reindeer predators
increase in death rate of reindeer
37
What would likely lead to increase in Minion population over time?
competition from 2-5 year old human children
more bombs and dropping disease
fewer villains
more bananas
38
According to the passage, the rabbit is an example of:
an important food source for Australian predators
an invasive species that is disrupting the natural ecosystem
a useful new primary consumer in Australia
a species helping other species survive
39
In the savannah food web, which consumers trophic level has the most energy in it?
primary consumers
producers
mean and nasty predators
omnivores
40
Population change? 20 babies, 15 rabbits died, 3 rabbits moved in, 12 moved away.
+20
+4
-20
-4
41
Bald eagle populations went up for years, but then dropped even with human protection. Why?
more nesting sites available
less competition for habitat
more natural predators of this apex predator
pollution is destroying underwater habitats
42
Which graph shows bird beaks after years of living with large hard seeds?
B
A
43
What's happening in the graph
during the time
with reduced carrying capacity?
dying deer = deer born (approximately)
the deer population is growing out of control
deer population are having zero babies
global warming is killing deer
