7. Which of the following terms is used to describe a linear sequence in which energy is transferred from one organism to the next as each organism eats another organism?
a. trophic level
b. food web
c. energy pyramid
d. food chain
D
10. Which of the following is an example of ecological succession?
a. a planted shrub growing on a patio
b. mosses covering the floor of an old building
c. a tomato planted in a garden
d. none of the above
Either B or D..
21. Humans affect marine ecosystems by which of the following?
a. overfishing
b. oil spills
c. pesticides
d. all of the above
A
27. The tundra is most suitable to a vertebrate that
a. requires nesting sites in tall trees
b. is cold blooded
c. has a green outer skin for camouflage
d. can migrate hundreds of kilometers each summer
Either B or D..
Thanks
-MC
d.
To answer question 7, "Which of the following terms is used to describe a linear sequence in which energy is transferred from one organism to the next as each organism eats another organism?", you would choose option D. food chain.
A food chain is a linear sequence that shows the transfer of energy as one organism is consumed by another in an ecosystem. It typically starts with a producer, such as a plant, which is then eaten by a herbivore. The herbivore is then eaten by a carnivore, and so on. Each step in the food chain represents a trophic level, showing the transfer of energy from one organism to the next.
For question 10, "Which of the following is an example of ecological succession?", the correct answer could be either option B or D.
Ecological succession is the process of change in the species composition and structure of an ecological community over time. It occurs in both terrestrial and aquatic ecosystems. Option B, "mosses covering the floor of an old building," is an example of secondary succession, where new plant life grows in an area previously occupied by other plants or animals. Option D, "none of the above," could also be correct if none of the given options align with examples of ecological succession that you may know.
Regarding question 21, "Humans affect marine ecosystems by which of the following?", the correct answer would be option D. all of the above.
Humans have a significant impact on marine ecosystems through activities such as overfishing, causing disruptions to food chains and depleting fish populations. Oil spills can pollute and damage marine habitats, leading to harm to marine life. Pesticides used on land can enter waterways and negatively affect aquatic organisms. Therefore, all the given options have an impact on marine ecosystems.
Lastly, for question 27, "The tundra is most suitable to a vertebrate that", the correct answer could be either option B or D.
The tundra is a cold and harsh environment, so animals that can tolerate low temperatures and cold environments would be best suited for it. Option B, "is cold-blooded," refers to animals that can adjust their body temperature according to their surroundings, such as reptiles. Option D, "can migrate hundreds of kilometers each summer," is also applicable as some vertebrates, like caribou, migrate long distances during the summer months in the tundra.