1. In the western U.S., ranchers aggressively killed wolves because they posed a threat to their cattle. As the wolf population declined, the deer population began increasing. As a result, the surrounding forest ecosystems experienced increasing damage. The large number of deer ravaged vegetation and destroyed young trees. The entire ecosystem became degraded until wolves became protected when they were determined to be an endangered species. Based on this information, what can you infer about the role of the wolves in this ecosystem?
A. They are a pioneer species
B. They are a keystone species
C. They are a prey species
D. They are a competitive species
I think its either B or C
2.Which of the following statements correctly states how human activity and biodiversity affect on another?
A. As humans develop land for homes and industry, biodiversity increases.
B. As humans restrict fishing and oil drilling, biodiversity decreases.
C. As biodiversity decreases, human land development becomes restricted.
D. As biodiversity increases, humans receive increased benefits.
I think its C
It's a PBA so I don't think they would.
Okay now I think
1. is B
and
2. is D
Yes. Both answers are right, now.
GREAT I get it now...... Thanks, Ms. Sue
hello can i get sentance
1. Keystone and prey species are much different. Check these definitions and make a decision.
2. No.
typo not on its one
Where's that guy thats gonna give us the entire awnser key for the whole test?
I'm pretty sure it is keystone species but I'm not 100% sure
1. The correct answer for the role of wolves in this ecosystem is B. They are a keystone species.
To arrive at this answer, we need to understand the concept of a keystone species. A keystone species is a species that has a disproportionately large impact on its ecosystem relative to its abundance. If the removal of a keystone species were to occur, it would have significant cascading effects on the ecosystem.
In this scenario, as the ranchers aggressively killed wolves, the wolf population declined. This led to the increase in the deer population because there were fewer wolves predating on them. The booming deer population, in turn, caused damage to the surrounding forest ecosystems. This indicates that the wolves play a vital role in maintaining the balance of the ecosystem by preying on deer and controlling their population. Therefore, the correct answer is B. They are a keystone species.
2. The correct answer for the statement regarding human activity and biodiversity is D. As biodiversity increases, humans receive increased benefits.
To understand this answer, we need to examine the relationship between human activity and biodiversity. Biodiversity refers to the variety of living organisms in a given area, including plants, animals, and microorganisms. Human activity can have both positive and negative impacts on biodiversity.
Option A is incorrect because the development of land for homes and industries often leads to habitat destruction and the loss of biodiversity.
Option B is also incorrect because restricting fishing and oil drilling can actually help protect certain species and ecosystems, thereby promoting biodiversity.
Option C is incorrect because it suggests that decreasing biodiversity restricts human land development, which is not necessarily the case.
Option D is the correct answer because as biodiversity increases, it provides a range of benefits to humans. Biodiversity ensures the functioning of ecosystems, including the provision of clean air and water, pollination of crops, and regulation of climate. Additionally, diverse ecosystems support various industries, such as tourism and agriculture, which contribute to human well-being.