1) parasites can kill their hosts
A. True
B. False
2) the addition or removal of a species causes a trophic Cascade
A. True
B. False
3) why are Marine scientists particularly concerned about parasites in the blue crab population
A. It is the only species impacted by parasites
B. Blue crabs are an important part of the regions economy
C. The blue crab is not as vulnerable to parasites as other species are
D. The parasites that impact the blue crab are deadly to the human population
4) why does it benefit an imperial shrimp to travel on a sea cucumber
A. The shrimp feeds on the sea cucumber as it rides
B. The shrimp could move to a new feeding ground
C. The sea cucumber is one of the shrimps predators
D. The sea cucumber carries parasites that the shrimp eat
5) how do species that fill the same niche as each other survive in ecosystems
A. One will eliminate the others
B. This does not happen in ecosystems
C. They adapt to fill slightly different niches
D. The ecosystem will adapt to support them
6) the lemming population cycle is
A. Generally 3 to 5 years
B. A unique event in nature
C. Limited to a cycle of 3 months
D. Related to seasonal births and deaths
7) why is parasitism a symbiotic relationship
A. It benefits both species involved
B. Neither species is harmed in this relationship
C. It is an example of interdependence among species
D. It allows more organisms to thrive in an ecosystem
8) the variations in the lemming population illustrate
A. The impact that population cycles have on predators
B. The ways in which a lack of food drives species to extinction
C. The benefits that generalist predators have over specific predators
D. How land animals have different population cycles than marine creatures
9) all of the following are problems after hurricanes EXCEPT
A. Turbulence
B. Colder water
C. Less sunlight
D. Mild currents
10) hurricanes can disrupt water up to how deep
A. 50 feet
B. 120 feet
C. 300 feet
D. 475 feet
11) the bottom layer of the food pyramid is generally the largest
A. True
B. False
12) when cod entered the baltic sea, which population dramatically increased
A. Herring
B. Zooplankton
C. Phytoplankton
D. Fish similar to cod
13) the relationship between the anemone and the boxer crab is an example of
A. Mimicry
B. Mutualism
C. Parasitism
D. Commensalism
14) which of the following is an example of an adaptation that allows similar species to live in the same environment
A. Desiccation is an issue for mussels but not for barnacles
B. Both mussels and barnacles live in the tidal ecosystems
C. Barnacles attach themselves to rocks or other fixtures of the landscape
D. Mussels are better equipped to live in the deep cracks of rocks than barnacles are
15) how do adaptations help species manage competition
A. They prevent overpopulation
B. They allow species to fill the same niche
C. They can create more space in the environment
D. They allow species to access different food sources
1) A. True
2) A. True
3) B. Blue crabs are an important part of the regions economy
4) B. The shrimp could move to a new feeding ground
5) C. They adapt to fill slightly different niches
6) D. Related to seasonal births and deaths
7) C. It is an example of interdependence among species
8) A. The impact that population cycles have on predators
9) D. Mild currents
10) C. 300 feet
11) A. True
12) A. Herring
13) D. Commensalism
14) B. Both mussels and barnacles live in the tidal ecosystems
15) D. They allow species to access different food sources
1) Answer: A. True
Explanation: Parasites have the potential to kill their hosts. This is because parasites rely on their hosts for survival and reproduction, and in some cases, excessive parasitic infection can weaken or harm the host to the point of death.
2) Answer: A. True
Explanation: The addition or removal of a species can indeed cause a trophic cascade. A trophic cascade is a chain of effects that occurs when changes in the population of one species have a ripple effect throughout the entire food web. For example, the removal of a top predator can cause an increase in the population of its prey, leading to a decrease in the prey's food source and subsequent effects on other species in the ecosystem.
3) Answer: B. Blue crabs are an important part of the region's economy
Explanation: Marine scientists are particularly concerned about parasites in the blue crab population because blue crabs are an important part of the region's economy. Blue crabs are commercially valuable and support a significant industry, so any decline or impact on their population due to parasites can have economic consequences.
4) Answer: D. The sea cucumber carries parasites that the shrimp eat
Explanation: It benefits an imperial shrimp to travel on a sea cucumber because the sea cucumber carries parasites that the shrimp eat. By hitching a ride on the sea cucumber, the shrimp can gain access to a food source that they would not have been able to find on their own.
5) Answer: C. They adapt to fill slightly different niches
Explanation: In ecosystems, species that fill the same niche as each other can coexist by adapting to fill slightly different niches. By occupying different ecological niches, they can utilize different resources and reduce direct competition for the same resources.
6) Answer: D. Related to seasonal births and deaths
Explanation: The lemming population cycle is related to seasonal births and deaths. Lemmings reproduce and experience population booms during certain times of the year, which provides an abundance of resources for their survival. However, as their population grows, resources become limited, leading to population crashes and deaths.
7) Answer: C. It is an example of interdependence among species
Explanation: Parasitism is a symbiotic relationship because it is an example of interdependence among species. In parasitism, one species (the parasite) benefits at the expense of the other species (the host). The parasite relies on the host for survival, reproduction, or obtaining resources.
8) Answer: A. The impact that population cycles have on predators
Explanation: The variations in the lemming population illustrate the impact that population cycles have on predators. Lemmings are a key prey species for many predators, and their population fluctuations can greatly influence the abundance and behavior of predator populations.
9) Answer: D. Mild currents
Explanation: After hurricanes, problems such as turbulence, colder water, and less sunlight can occur. However, mild currents are not typically a problem associated with hurricanes.
10) Answer: C. 300 feet
Explanation: Hurricanes can disrupt water up to a depth of approximately 300 feet. The strong winds and intense storm surges generated by hurricanes can cause significant mixing and disruption of the water column.
11) Answer: A. True
Explanation: It is true that the bottom layer of the food pyramid is generally the largest. The bottom layer, also known as the producers or autotrophs, includes plants and algae that convert energy from the sun into organic matter through photosynthesis. These primary producers provide the foundation for the rest of the ecosystem and support higher trophic levels.
12) Answer: B. Zooplankton
Explanation: When cod entered the Baltic Sea, the population of herring dramatically increased. As a result of the cod's predatory impact on other fish species, including herring, the herring population experienced a release from predation and subsequently increased in numbers.
13) Answer: B. Mutualism
Explanation: The relationship between the anemone and the boxer crab is an example of mutualism. The anemone provides protection for the crab by acting as a defensive barrier against potential predators, while the crab provides the anemone with mobility and access to food sources.
14) Answer: C. Barnacles attach themselves to rocks or other fixtures of the landscape
Explanation: Both mussels and barnacles live in tidal ecosystems, and both face the challenge of desiccation (drying out). However, barnacles have adapted to attach themselves to rocks or other fixtures, which helps them avoid drying out during low tide. This adaptation allows both species to live in the same environment but occupy slightly different microhabitats, reducing direct competition.
15) Answer: D. They allow species to access different food sources
Explanation: Adaptations help species manage competition by allowing them to access different food sources. Different species have evolved specific adaptations that enable them to utilize unique food resources and occupy different ecological niches, reducing competition for limited resources.
I think these are the answers.
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c