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Re: Staying Focused: Effective Strategies to Stay Alert While Reading GRE [#permalink]
Expert Reply
The passage is located at the following link https://gre.myprepclub.com/forum/the-ps ... ml#p125273

Quote:
Explanation of the Passage


1) Salvia (a psychoactive herb) is popular among teens, with many online videos of their hallucinogenic experiences.

2) Most videos show teens losing focus for 7–10 minutes, followed by claims of a "transformative experience."

3) Parents worry about neurological damage, but the passage emphasizes other concerns:

- Compromised privacy

- Documentation of illegal activity

- An "open invitation to online predators"
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Re: Staying Focused: Effective Strategies to Stay Alert While Reading GRE [#permalink]
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The passage is located at the following link https://gre.myprepclub.com/forum/specie ... ml#p115856


Quote:
EXPLANATION OF THE PASSAGE


Species interdependence in nature confers many benefits on the species involved, but it can also become a point of weakness when one species involved in the relationship is affected by a catastrophe.

Ok . Many species are intertwined with each other, and they have a lot of benefits from this mutual relationship. However, we do have also several drawbacks

Thus, flowering plant species dependent on insect pollination, as opposed to self-pollination or wind pollination, could be endangered when the population of insect-pollinators is depleted by the use of pesticides.

Plants depend on pollination from other animals or insects such as bees

In the forests of New Brunswick, for example, various pesticides have been sprayed in the past 25 years in efforts to control the spruce budworm, an economically significant pest.

We used pesticides to fight X but this had negative effects

Scientists have now investigated the effects of the spraying of Matacil, one of the anti-budworm agents that is least toxic to insect-pollinators.

A new compound could be be less harmful to pollinators than it was those we used 25 years ago


They studied Matacil’s effects on insect mortality in a wide variety of wild insect species and on plant fecundity, expressed as the percentage of the total flowers on an individual plant that actually developed fruit and bore seeds.


Ok Metacil was tested in the way you read above: in a certain ration. Do not need to remember in your mind. Just the location of the ratio in the passage just in case you need it to recall


They found that the most pronounced mortality after the spraying of Matacil occurred among the smaller bees and one family of flies, insects that were all important pollinators of numerous species of plants growing beneath the tree canopy of forests.

From the use of Matacil your bees and ONE family of flies were affected


The fecundity of plants in one common indigenous species, the red-osier dogwood, was significantly reduced in the sprayed areas as compared to that of plants in control plots where Matacil was not sprayed.

This specific plant if handled with the matacil had influenced the production if used


This species is highly dependent on the insect-pollinators most vulnerable to Matacil.

Red-osier heavenly depends on the pollinators that are affected a lot by Matacil

The creeping dogwood, a species similar to the red-osier dogwood, but which is pollinated by large bees, such as bumblebees, showed no significant decline in fecundity.

Another plant similar to the red osier- in the same scenario was not affected or at least in a minimum way nor the pollinators LARGE bees

Since large bees are not affected by the spraying of Matacil, these results add weight to the argument that spraying where the pollinators are sensitive to the pesticide used decreases plant fecundity.

The sentence above tell us that probably Matacil is dangerous for YOUNG bees but not Older or LARGE bees

The question of whether the decrease in plant fecundity caused by the spraying of pesticides actually causes a decline in the overall population of flowering plant species still remains unanswered.

regardless the first observations we do not have conclusive results to be certain

Plant species dependent solely on seeds for survival or dispersal are obviously more vulnerable to any decrease in plant fecundity that occurs, whatever its cause.

also plant that depends from the fecundity of other plant could be also affected. Not sure thought this is the real meaning of this portion. Kinda blurry

If, on the other hand, vegetative growth and dispersal (by means of shoots or runners) are available as alternative reproductive strategies for a species, then decreases in plant fecundity may be of little consequence.

In the scenario above, having an alternative, the fecundity could be the same

The fecundity effects described here are likely to have the most profound impact on plant species with all four of the following characteristics: a short life span, a narrow geographic range, an incapacity for vegetative propagation, and a dependence on a small number of insect-pollinator species.

The fecundity could be impacted for the reasons above


Perhaps we should give special attention to the conservation of such plant species since they lack key factors in their defenses against the environmental disruption caused by pesticide use.

Conclusion of the argument
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Re: Staying Focused: Effective Strategies to Stay Alert While Reading GRE [#permalink]
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The passage is located at the following link https://gre.myprepclub.com/forum/for-ho ... tml#p78788


Quote:
The passage describes an innovative greenhouse design for hot desert areas near the sea. It uses seawater to cool and humidify the incoming hot air through a front wall made of perforated, wet cardboard. This cooler, moist air helps plants grow faster and reduces water loss from the leaves.

The greenhouse has a special double-layered roof that lets in visible sunlight but reflects infrared heat, trapping warmth between the layers. This warm air moves downward and mixes with the greenhouse air as it reaches a second wet cardboard wall at the back.

Here, the air picks up more moisture, which then condenses on a seawater-cooled metal wall, producing freshwater. This distilled water can be used to irrigate the plants inside the greenhouse.

In summary, the greenhouse cleverly cools incoming air for better plant growth and simultaneously produces freshwater from seawater to irrigate the plants.
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Re: Staying Focused: Effective Strategies to Stay Alert While Reading GRE [#permalink]
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The passage is located at the following link https://gre.myprepclub.com/forum/the-ef ... ml#p119533


Quote:
Explanation of the passage

The effects of climate change are coming into sharper focus: because of increased global temperatures, sea levels are rising, plants are blooming earlier in the spring, and water supplies are declining. That the global climate may reach a dangerous turning point, threatening food supplies, has become a real possibility.

In brief, climate change is a real threat

The best way to reduce this danger is to cut emissions of carbon dioxide and other greenhouse gases. But success requires that all major greenhouse-gas- emitting countries, with their divergent, often conflicting interests, cooperate for several decades in a sustained effort to develop and deploy new technology that produces much lower emissions. Incentives to drop out of this effort, thereby avoiding the high cost of emission controls, will be strong. A more feasible solution is for governments to promote an international cooperative study and the eventual implementation of geoengineering the deliberate manipulation of Earth's atmosphere to counteract the warming effect of greenhouse-gas emissions.

Fight the climate change requires a coordination among the nations at large. On a massive scale. Maybe we do have a shortcut: geoengineering to curb the gas emissions


This must be an international effort, because unilateral geoengineering could have detrimental consequences. The discovery of the cooling effects of volcanic emissions has suggested a means of geoengineering that is feasible for any reasonably technologically advanced nation and relatively inexpensive. For as little as a few billion dollars, a nation could emulate these volcanic effects by deliberately putting reflective particles into the upper atmosphere. Without proactive international cooperation, a country may conclude that global warming has become so harmful to its interests that it should unilaterally engage in geoengineering without considering the effects on other countries, effects that could be catastrophic.

This new field of study is based on the assumption that the volcanic eruptions ignite in the atmosphere sulfur dioxide and hashes, clouding the planet. As such, the x-ray from the sun will not reach our planet and will be reflected back into the outer space. However, there is a caveat: if a nation acts alone without a real coordination with the others we could have negative effect on those area of the planet even though those countries do not want use this way to solvethe climate change


‎ ‎ Thus, governments must support an international program of scientific research that would help on three fronts: (1) transform discussion about geoengineering into focused assessment of concrete risks; (2) secure funding and political cover for essential but controversial experiments that are conducted by the world's leading scientists and are evaluated in a fully transparent fashion; (3) craft norms for the testing and possible deployment of geoengineering technologies. Scientists could be influential in creating these norms, just as nuclear scientists framed options on nuclear testing and influenced pivotal government decisions during the Cold War.

The govs should act in unity to assess the benefits and the cons of this new field of studies in there ways enlisted above
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Re: Staying Focused: Effective Strategies to Stay Alert While Reading GRE [#permalink]
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