1.
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1 point
panthera tigris and panthera leo are a different
order
species
genus
phylum
2. A tool scientists use to classify organisms by their traits is known as
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1 point
binomial nomenclature
taxonomy
dichotomous key
limiting factors
3. Use the image below to answer the next 2 questions:
4. This graphic represents a
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1 point
dichotomous key
carrying capacity
food web
phylogenetic tree
5. The orange arrow at the bottom of the image points to
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1 point
the most recent common ancestor of the Lesser Apes and the Great Apes
the most recent common ancestor of humans and chimpanzees
the most recent common ancestor of gibbons and orangutans
None of the above are correct
6. A keystone species is one that
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1 point
a. eats a mixture of plants and animals
b. is introduced into a community after a major disturbance
c. causes the amount of diversity in a community to decrease
d. helps to stabilize the populations of other species in the community
Use the Figure below to answer the next 3 questions.
7. What is happening to the growth of the population shown at interval 2:
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1 point
a. Initial growth
b. Steady state
c. Decline
d. Exponential growth
8. The dashed line represents
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1 point
a. The birthrate of this population
b. The migration rate of this population
c. The carrying capacity of this population
d. The extinction rate of this population
9. Name 2 factors that could have caused the population to level off in stages 3 and 4.
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2 points
10. Which of the following is an example of competition?
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1 point
a. The leaves of a tree prevent a small shrub from getting sunlightb. Three species of bird feed at different heights in the same tree
b. Three species of bird feed at different heights in the same tree
c. Zebra and giraffes feed on different grassland plants
d. Cats living in two different homes eat the same brand of cat food
11. Which factor has the largest impact on biodiversity?
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1 point
introduction of a new species
increased predation
habitat loss
poaching
12. Small, controlled experiments in a laboratory have fewer _________ than ecosystem-scale experiments
*
1 point
reseachers
variables
models
procedures
13. A herd of antelope has 20 members. How big is the herd after 3 male immigrate, 2 females emigrate, 1 female is born, and 2 males die?
*
1 point
18
20
21
22
14. The image below is an example of
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1 point
Captionless Image
interspecific competition
torpor
intraspecific competition
predator-prey interaction
15. Severe weather events can impact biodiversity. Think about a severe weather situation you have experienced near your home or have witnessed on the news. In 3–5 sentences, explain how the severe weather event created ecological disturbances that impacted biodiversity.
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3 points
Analyze the graphs below
16. Which species was most successful at surviving when grown together?
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1 point
P. aurelia
P. caudatum
Both were successful at surviving
Neither survived
17. Explain what happened to these populations in Graph C. Be detailed.
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2 points
18. The first organisms to repopulate an area affected by a volcanic eruption are called
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1 point
pioneer species
keystone species
invasive species
apex species
19. Which organism is considered the apex predator in this food web?
*
2 points
Captionless Image
20. Describe how the removal of the apex predator would affect at least 2 other species in this ecosystem.
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2 points
Essential Standard #6 Energy Flow Check
How are molecules cycled back through the ecosystem?
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1 point
Molecules are cycled back through the ecosystem when organisms die. Decomposers break down dead and decaying organisms and return their molecules back into the ecosystem.
Molecules are cycled back through the ecosystem during photosynthesis.
Molecules are cycled back through the ecosystem during cell respiration.
All of the above are ways that molecules cycle through the ecosystem.
1. Panthera tigris and Panthera leo are different species. To determine the correct taxonomic classification, we need to understand the levels of classification. The levels of classification, from broadest to most specific, are domain, kingdom, phylum, class, order, family, genus, and species. In this case, "order" is too broad, "phylum" is even broader, so we can rule those out. The correct answer is "genus," as Panthera tigris and Panthera leo are different species within the same genus, Panthera.
2. The tool scientists use to classify organisms by their traits is known as taxonomy. Other options listed are also related to classification but are not the most appropriate answer. Binomial nomenclature is the naming system used in taxonomy where each species is given a unique two-part scientific name. A dichotomous key is a tool used to identify organisms based on a series of choices between two alternative characteristics. Limiting factors are factors that limit the growth or distribution of a population within an ecosystem.
3. The question is incomplete without an accompanying image.
4. Without the image, it is not possible to determine what the graphic represents. It could be a dichotomous key, a carrying capacity graph, a food web, or a phylogenetic tree.
5. Without the image, it is not possible to determine what the orange arrow at the bottom of the image points to. Provide the image for a more accurate answer.
6. A keystone species is one that helps to stabilize the populations of other species in the community, option (d). Keystone species have a disproportionately large impact on their environment compared to their abundance or biomass. They play critical roles in maintaining the structure and function of ecosystems.
7. Without access to the provided figure, it is not possible to answer this question accurately. Please provide the figure for a more accurate answer.
8. Again, without access to the provided figure, it is not possible to answer this question accurately. Please provide the figure for a more accurate answer.
9. The question asks for two factors that could have caused the population to level off in stages 3 and 4. Without knowing the specific stages and factors, it is challenging to provide an accurate answer. However, factors that could contribute to leveling off include limited food resources, increased competition, disease outbreaks, or environmental changes.
10. Competition occurs when individuals or species compete for the same resources. Of the options given, option (a) "The leaves of a tree prevent a small shrub from getting sunlight" is an example of competition. Both the tree and the shrub are competing for sunlight, a necessary resource for growth.
11. Habitat loss has the largest impact on biodiversity. When habitats are destroyed or degraded, species lose their homes and are often unable to survive, leading to a loss of biodiversity. While other factors, such as the introduction of a new species or increased predation, can also impact biodiversity, habitat loss is the most significant driver of species extinction and loss of biodiversity.
12. Small, controlled experiments in a laboratory have fewer variables than ecosystem-scale experiments. In a laboratory setting, researchers have more control over environmental conditions and can manipulate variables to study specific effects. Ecosystem-scale experiments involve complex and interconnected systems with numerous factors and variables, making it harder to control and isolate specific variables.
13. To determine the size of the herd after the given events, we need to calculate the net change in the number of antelope. After 3 males immigrate (+3), 2 females emigrate (-2), 1 female is born (+1), and 2 males die (-2), the net change is +3 - 2 + 1 - 2 = 0. Therefore, the herd size remains the same, which is 20.
14. Without the provided image, it is not possible to determine what the image represents. Please provide the image for a more accurate answer.
15. The question asks for a personal explanation of how a severe weather event created ecological disturbances that impacted biodiversity. As an AI, I am unable to provide personal experiences or observations. Please describe the specific severe weather event and its ecological impact for a detailed answer.
16. Without access to the graphs mentioned, it is not possible to determine which species was most successful at surviving when grown together. Please provide the graphs for a more accurate answer.
17. Without access to Graph C, it is not possible to provide a detailed explanation of what happened to the populations. Please provide the graph for a more accurate answer.
18. The first organisms to repopulate an area affected by a volcanic eruption are called pioneer species. These are typically hardy, fast-growing plants or organisms that can tolerate harsh conditions and pave the way for other species to colonize the area.
19. Without the provided image, it is not possible to determine which organism is considered the apex predator in the food web. Please provide the image for a more accurate answer.
20. Without access to the image, it is not possible to describe how the removal of the apex predator would affect other species in the ecosystem. Please provide the image for a more accurate answer.
21. Molecules are cycled back through the ecosystem when organisms die. Decomposers, such as bacteria and fungi, break down the dead and decaying organisms, releasing their molecules back into the ecosystem in a process called decomposition. This allows the nutrients stored in the organisms' tissues to be recycled and reused by other organisms in the ecosystem. Additionally, molecules are also cycled through the ecosystem during processes like photosynthesis and cell respiration.