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Spring exam ag bio
Spring exam ag bio
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Answers
1
How does increased genetic diversity impact species over time?
It makes all offspring identical
It supports the evolution of the species
It reduces survival chances
It makes all offspring identical
2
Which of the following best describes ions?
Molecules that are too large to pass through the membrane
Substances that never require energy to move through membranes
Atoms w/electrical charge due to unequal numbers of protons and electrons
Neutral atoms with equal numbers of protons and electrons
3
Which type of organism recycles nutrients for the ecosystem?
Herbivore
Producer
Decomposer
Carnivore
4
Which environmental factors must be controlled, as chick develops, to insure its health and homeostasis when it hatches?
humidity
temperature
carbon dioxide removal
oxygen uptake
5
8. What is the principal commercial feed type of corn grown in the United States?
(6.4.1)
Sweet Corn
Popcorn
Dent Corn
6
1. Which of the following is NOT one of the four main ways in which we value living things?
(6.2.2)
Aesthetic
Environmental
Economic
Ergonomic
7
5. What is
evolution
?
(6.3.1)
None of the above options
a hypothesis
a fact
A fact and a hypothesis
8
9. During the late 1800s and early 1900s the demand for corn ______________.
(6.4.5)
Increased
Decreased
All of the above
9
What is a key characteristic of cage-free egg production?
Hens are kept in individual wire cages
Hens are kept in groups of 3-4
Hens must have outdoor access
Hens can move freely within an enclosed building
10
scientists found that the change in yields is due to projected increases in ____________
Light
Chemicals
Temperature
Moisture
11
15. Plant height works the same way as height in humans.
(6.4.4)
True
False
12
Which of the following illustrates the correct ordering of trophic levels? (5.5.2)
decomposers-carnivores-producers-herbivores
herbivores- producers-carnivores-decomposers
producers-herbivores-carnivores-decomposers
carnivores-producers-omnivores
13
Which of the following factors must be controlled, as chicks develops in the egg, to insure the health of the chicken?
Carbon Dioxide Intake
Temperature
Nitrogen Consumption
Volume
14
Which of the following are roles or functions of fats in a diet.
Long Term Energy Storage
Provide Building Block for Proteins
For Building Up Muscles
Short Term Energy Usage
15
19. From an ecological and economic perspective, what makes corn an extraordinary crop?
It can only be grown in specific climates
Its versatility allows use in food, fuel, and industrial products
It has remained unchanged since ancient times
It requires extensive manual labor to cultivate
16
Which development most dramatically illustrates this trait
The creation of hybrid corn varieties
The ability to produce 13 million kernels per acre
The invention of new farm machinery
The development of synthetic fertilizers
17
4. What is the initial ancestor common to all organisms within the cladogram?
(6.3.1)
Clades
Outgroup
Cladogram
Root
18
In a food web a fox eats rabbits that feed on shrubs. What type of consumer are foxes?
Secondary Consumer
Producers
Primary Consumer
Tertiary Consumer
19
Which animal is the apex predator?
owl
snake
hawk
fox
20
How do large molecules and ions move through the cell membrane?
They must provide their own energy source
They must be completely neutral in charge
They pass through specialized protein passageways (channels)
They must be extremely large in size
21
Which of the following is true about Carbohydrates, Lipids, and Proteins?
None of them are found naturally in our bodies
They all provide Energy
They are all used for building up muscles
They all contain Carbon (C), Hydrogen (H), and Oxygen (O)
22
What is meant by "selectively permeable" when describing cell membranes?
The membrane randomly selects which substances to let through
All substances can move through the membrane freely
Only certain substances can pass through the membrane
No substances can move through the membrane
23
The efficiency of energy transfer from a lower trophic level to the next highest level is roughly __________%.
10
100
5
1
24
Average national corn yield (a productivity measure) rose from around _____ bushels
15
25
30
10
25
As you move up a food chain the amount of energy decreases.
False
True
26
14. ____________ traits or quantitative genetics are traits that are controlled by more than one gene.
(6.4.4)
Genetic
Physical
Visual
Polygenic
27
What is
crossing over
in genetic terms?
The exchange of genetic material between homologous chromosomes
The formation of gametes through meiosis
The separation of chromosomes during cell division
The process of DNA replication during mitosis
28
Where does the energy in every food web start?
sugar
Sun
Decomposers
Consumers
29
What is cell
differentiation
?
The activation of DNA that gives cells specific functions
The process of cells dying
When cells lose their genetic information
When cells divide into two identical copies
30
The passage suggests that corn's development represents a technological achievement. Which best supports this claim
Corn can be grown on multiple continents
Corn is used in multiple industrial applications
Corn yields have increased over 500% since the early 1900s
Corn was domesticated from a wild grass
31
2. When did maize start to become a much more important part of the Olmec diet and culture?
(6.2.2)
800 BC
900 BC
600 BC
700 BC
32
Which of the following best explains why corn was considered more than just a food crop by Native American Cultures?
It was a sacred symbol with religious and cultural meaning beyond nutrition
It was the only reliable crop they could grow
It was easy to store for long periods
It was economically valuable for trading
33
What characteristic makes stem cells unique before differentiation?
They are already specialized for specific functions
They only contain partial genetic information
They can only become blood cells
They contain complete genetic information but no specific function yet
34
7. What is
codominance
?
(6.3.3)
When one version of the gene is expressed or observed
both versions or alleles for the gene are equally expressed or observed
35
10. How is corn pollinated?
(6.4.5)
Wind Pollination
Self Pollination
Cross Pollination
36
Bees gaining nectar while pollinating flowers is an example of what type of symbiosis?
Mutualism
Parasitism
None of These
Commensalism
37
Which of the following does not need to be controlled, as chicks develops in eggs, to insure the health of the chicken?
carbon dioxide removal
humidity
nitrogen consumption
oxygen uptake
38
11. We now produce ______% more corn, on _______% fewer acres.
(6.4.5)
30%, 25%
15%, 40%
20%, 25%
39
The arrows in a food chain or web represents what?
They represent how water is transferred within a habitat
It shows how sunlight flows within an ecosystem.
They point to the organism that is being eaten.
They show what direction the energy is flowing between organisms.
40
3. When did the Aztec Empire come to an end?
(6.2.2)
1300s
1400s
1500s
1700s
41
What is the primary outcome of meiosis in sexual reproduction?
Production of fewer offspring
Combination and shuffling of genetic material from both parents
Reduction in genetic diversity
Creation of identical offspring
42
6. The theory of evolution states that populations of organisms have changed _________ over time.
(6.3.1)
Slowly
Consistently
Barely
Swiftly
43
Why is temperature control important for chicken egg development?
It determines the gender of the chick
It maintains proper metabolic rates for development
It only affects the size of the developing chick
It only impacts the thickness of the eggshell
44
16. What does the "F" in FOIL stand for?
(6.4.2)
Final
First
Free
45
What is the primary location where most stem cells are found in humans?
In muscle tissues
In the brain tissue
In large bones like your Femur
In the blood vessels
