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Ahat [919]
4 years ago
10

When did scientists first discover the Mid-Atlantic ridge

Biology
1 answer:
klasskru [66]4 years ago
4 0

The existence of the ridge was discovered during the expedition of HMS Challenger in 1872. A team of scientists on board, led by Charles Wyville Thomson, discovered a large rise in the middle of the Atlantic while investigating the future location for a transatlantic telegraph cable

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Photosynthesis occurs in the membrane of which structure within a chloroplast?
Montano1993 [528]
1. A thylakoids
2. D ATP
6 0
3 years ago
The material that makes up chromosomes is ?
ra1l [238]
They’re made up of histones
8 0
3 years ago
Read 2 more answers
What is true about human use of the Tropical Dry Forest biome versus the Tropical Rainforest biome?
lesya692 [45]

Answer:

Option (D)

Explanation:

The tropical rain forest and tropical dry forest lies on the tropical regions of both the hemisphere. These are the regions on and around the tropic of cancer and tropic of capricorn. In the tropical rain forest, the rate of precipitation is higher than the rate of evapo-transpiration, so the temperature remains relatively cooler. Whereas, in the tropical dry forest, the rate of evapo-transpiration is more than the rate of precipitation, as a result of which the temperature remains comparatively high.

The tropical dry forest is very good for agricultural purpose, as it contains nutrient rich soil. So it has been destroyed to a greater extent for agricultural use, grazing of animals.

Whereas, the tropical rain forest is not suitable for the agricultural use because the soil here are affected by the rainfall, that washes away the nutrients, making the soil less fertile.

Thus the correct answer is option (D).

8 0
4 years ago
What Technology is used to study the biosphere
White raven [17]
At a smaller scale, other scientists may investigate the processes involved in cycling water and the elements of life through the biosphere: carbon, nitrogen, sulfur, phosphorous, and other elements. These studies can also provide "ground-truth" - observations on the ground which are used to validate the remotely sensed data. As more and more observational and experimental data become available, other scientists construct models to help us understand the biosphere, how it evolved, and even provide tools that allow for predicting the future response of the biosphere to global change and human activities.
8 0
3 years ago
Do some outside research and write a short report about 2 different diseases. One disease must be caused by a bacteria and the o
V125BC [204]

Answer No 1:

Bacterial Disease:

Common name : Typhoid

Scientific Name: Typhi

History About disease:

Typhoid can be described as an acute illness which is caused by the bacteria: Salmonella enterica serotype Typhi.

Typhoid fever was responsible for a widespread plague in Athens in 430BC. This outbreak proved to be fatal for one third of the population of Athens. It is difficult to determine the cause of plagues and infectious diseases in early history, although some speculation is usually allowed.

Jamestown, an English colony in Virginia, is also thought by some historians to have died out as a result of typhoid fever. The fever proved fatal for more than 6000 settlers between 1607 and 1624, and may have been responsible for eliminating the entire colony.

Military and war environments have often been subjected to the presence of typhoid fever throughout history. In excess of 80,000 soldiers died as a result of typhoid fever or dysentery in the American Civil War. Likewise, the Spanish-American War led to infections with typhoid both on the field and in training camps.

Answer No 2:

The bacteria that cause typhoid fever spread through contaminated food or water and occasionally through direct contact with someone who is infected.The majority of people in industrialized countries pick up typhoid bacteria while traveling and spread it to others through the fecal-oral route.

This means that Salmonella typhi is passed in the feces and sometimes in the urine of infected people. You can contract the infection if you eat food handled by someone with typhoid fever who hasn't washed carefully after using the toilet. You can also become infected by drinking water contaminated with the bacteria.

Typhoid vaccine is used for the eradication of typhoid.

Answer No 3:

Name: Ebola

Scientific name: Zaire ebolavirus

Ebola is thought to first occur in Sudan in 1976. Ir infected over 248 people.  the second Ebola virus emerged from Yambuku, Zaire, Ebola-Zaire (EBOZ).The third strain of Ebola, Ebola Reston (EBOR), was first identified in 1989 when infected monkeys were imported into Reston, Virginia, from Mindanao in the Philippines. Since then, the virus has been infecting people from time to time, leading to outbreaks in several African countries.

Answer No 4:

Ebola isn’t as contagious as more common viruses like colds, influenza, or measles. It spreads to people by contact with the skin or bodily fluids of an infected animal, like a monkey, chimp, or fruit bat. Then it moves from person to person the same way. Those who care for a sick person or bury someone who has died from the disease often get it.

Other ways to get Ebola include touching contaminated needles or surfaces.

You can’t get Ebola from air, water, or food. A person who has Ebola but has no symptoms can’t spread the disease, either.

Explanation:

4 0
4 years ago
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