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wlad13 [49]
3 years ago
11

Helen's in 1980, over 200 square miles of pristine forest were buried under millions of tons of lava, ash, mud, and avalanche de

bris. Just a year after the eruption, lupine plants are seen on the pumice plain. Lupine is a herbaceous perennial. It is: A Nitrogen Fixer Short-lived Dynamic Accumulator Beneficial Insect Attractor Beneficial Insect Shelter Ground Cover Edible Seeds As the mountain sleeps, wildlife bounces back: gophers are seen, surviving by eating the lupine. The top of Mount St Helen's was considered to be alpine tundra. How can these two organisms, the lupine and the gopher, aid in succession on Mount St. Helen's? A) The lupine is a pioneer species. It adds oxygen to the ecosystem. The gopher relies on the lupine for food and oxygen. B) Both the lupine and the gopher improve air quality; the gopher releases carbon dioxide and the lupine uses the oxygen for photosynthesis. C) The lupine and the gopher act as soil formers by decomposing the lava that is found on Mount ST. Helen's as a result of the volcanic eruption. D) Both the lupine and the gopher improve soil quality; the lupine fixes nitrogen and adds organic matter. The gopher adds organic matter and aerates the soil.
Biology
2 answers:
Olenka [21]3 years ago
4 0
Based on the given scenario above, both the plants Lupine and the Gopher have survived on Mount St. Helen's. This has become possible because both of these plants aid in improving soil quality. The gopher is responsible in adding organic matter and also introduces air to the soil. On the other hand, the lupine is responsible in fixing nitrogen and adds organic matter. Answer is D.
son4ous [18]3 years ago
4 0

Answer:

D) Both the lupine and the gopher improve soil quality.

Explanation:

The correct Answer is D, the gopher and the lupine are colonizers in this new habitat, and help in the development of the soil quality. Therefore aiding in succession by changing the ecosystem over time, and possibly allowing more types of animals and plants to live there.

Answer B) its not correct because plants use CO2 for photosynthesis not Oxygen.

Answer A) its not correct because the gopher does not rely on the lupine for Oxygen.

Answer C) its not correct because they do not decompose the lava.

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Explain the global water crisis in your own words​
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Explanation:

Water is the basic necessity of every human being. But, water scarcity is a major issue that is rising very rapidly in modern-day India. The problem has become so severe that in many states the groundwater has almost dried up and people have to depend on water supply from other sources. In addition, water is one of the most misused commodities that we still waste. It is the central point of our lives but not the central point of our focus.

In the past, people understand the value of water and plan their lives around it. Moreover, many civilizations bloom and lost on account of water. But, today we have knowledge but we still fail to understand the value of water.

Reason for Water Scarcity in India

Water scarcity is the cause of mismanagement and excess population growth of the water resources. Also, it is a man-made issue that continues to rise. Besides, some of the reasons for water scarcity are:

Wasteful use of water for Agriculture- India is one of the major food growers in the world. That produces tons of quantity of food to feed its population and export the surplus that is left.

In addition, producing this much food requires a lot of water too. The traditional method of irrigation wastes a lot of water due to evaporation, water conveyance, drainage, percolation, and the overuse of groundwater. Besides, most of the areas in India use traditional irrigation techniques that stress the availability of water.

But, the solution to this problem lies in the extensive irrigation techniques such as micro-irrigation in which we provide water to plants and crops using a sprinkler or drip irrigation.

Reduction in water recharge systems- Due to rapid construction that uses concrete and marbles do not let the rainwater to get absorbed in the soil. But, if we install some mechanism in our houses that can hold the rainwater then we can recharge the groundwater.

Lack of water management and distribution- There is a need for an efficient system that can manage and distribute the water in urban areas. Also, the government needs to enhance its technology and investment in water treatment. Besides, we should ensure optimization at the planning level.

Solutions to Overcome this Problem

Water-free urinal- Urinal waste around 6 liters of water per flush that add up to 25 thousand liters per year. If a male member of the house stops using the flush then they can save lots of water.

Close the running tap- During dishwashing and hand washing people often let the tap running. These running taps waste thousands of liters of water per year. Besides, closing the tap will reduce this problem.

Replace dripping taps- In India it is commonly seen that most of the houses have one or two taps that drop water even when they are close. This running tap wastes up to 30,000 liters of water that nobody bothers to change. So, we should replace these taps immediately.

To conclude, water scarcity has become a more dangerous problem day by day. Also, due to our leniency that we haven’t taken the problem water scarcity seriously. But, now the authorities and people are working to resolve this problem so that our future generations do not have to buy this necessity.

8 0
3 years ago
In your own words, explain what natural selection is?
Katyanochek1 [597]

Answer:

Natural selection is the process of which forms of life having traits that better enable them to adapt to specific environmental pressures, such as predators, changes in climate, or even competition for food or mates. As the species will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.

3 0
3 years ago
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Two gametes end up with 30 chromosomes, one gamete will have 31 and one will have 29.

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I drew a simple example of what would happen during meiosis of a 2n=4 cell if there was non-disjunction in a single dyad during meiosis II.

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