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Anit [1.1K]
3 years ago
5

What are stromatolites?

Geography
2 answers:
yaroslaw [1]3 years ago
8 0

<u>Stromatolites are layered mounds of calcium carbonate that were deposited by algae during the Precambrian time.</u>

Answer: Option C

<u>Explanation:</u>

Stromatolites are the deposit of the layer which is mostly of limestone and these are mainly formed by the blue green algae which are only one celled organism of primitive times.

The features of these are that they are normally thin and have layers that might be either light or dark in color and are either flat or some of them even have a shape of a dome.

loris [4]3 years ago
5 0

Answer:

a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.    C

Explanation:

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Helium was discovered on earth years after it had been discovered on the sun.
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The statement is true.
As weird as it may sound, helium was indeed first discovered on the Sun, and after some time on Earth. The first evidence of helium was observed on August 18 1868, as a bright yellow line with a wavelength of 587.49 nanometers in the spectrum of the Sun's chromosphere. This line has been detected by a French astronomer by the name of Jules Janssen during a total solar eclipse in Gantur, India. 
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3 years ago
Why has the Ugandan government pushed Abstinence as a means of combating the spread of HIV/AIDS?
Sholpan [36]

Answer:

According to (hrw dot com) the “Abstinence-Only HIV/AIDS Programs” in Uganda in the early 200x is called The Less They Know, the Better. Why the people there do not need to know so much about HIV, but they need just to follow the Abstinence ? “We don't think abstinence is really working in our communities. We work with children in primary five through seven who are engaging in sexual activities. We always come with the message to delay sexual debut. But for most children here, this is not enough.” - The youth leader of the program said.

So, the main reason why has the Ugandan government pushed Abstinence as a means of combating the spread of HIV/AIDS is: the people for whom the propaganda is done are mostly children above 10, who tend to start having sex at an early age. Uganda is home to nearly 1 million children orphaned by HIV/AIDS, many of them at high risk of HIV infection themselves.

“Abstinence Until Marriage" is the meaning of the Abstinence-Only HIV/AIDS Programs. The content of the propaganda is teaching that abstaining from sex until marriage is the only effective method of HIV prevention and that marriage between a man and a woman is the expected standard of human sexual behavior.

The other reasons are:

- Demographic and health surveys show that over half of Ugandan girls have had sex by age seventeen, usually with someone older.

- Among girls who marry before the age of eighteen, most marry men who have been sexually active for several years, often without having used condoms.

And there is the biggest problem for Uganda related to poverty: Ss in all countries, AIDS in Uganda is a disease of poverty. Many Ugandans live on less than U.S.$1 per day, a situation that has been exacerbated by decades of political violence and civil war. New HIV cases occur among girls trading sex for school fees, women enduring violent marriages because they lack economic independence, and orphans being pushed onto the street and sexually exploited.

Explanation:

Hope this answer can help you. Have a nice day!

8 0
3 years ago
Suppose scientists believe that they’ve discovered a new planet
Veseljchak [2.6K]

Answer:It must follow a closed orbit around a star. -must be true for the object they've found to qualify as a planet.

Explanation:

5 0
3 years ago
SCIENTISTS CARRY OUT THEIR WORK IN AN ORGANISED WAY CALLED THE ----​
Veronika [31]

Answer:

Is it the scientific method?

3 0
2 years ago
Trenches occur at divergent plate boundaries.<br> a. True<br> b. False
xenn [34]

Answer:

b. False

Explanation:

The trenches are not physical features that occur on places where there are subduction zones between the tectonic plates, but they do not appear on places where there are divergent plate boundaries. The trenches are simply very deep, narrow, ocean beds, that have very steep sides.

The divergent boundaries are the opposite boundaries from where the trenches occur. These boundaries occur between tectonic plates that move away from each other. The typical physical feature at this type of plate boundaries are the mid-ocean ridges (if it occurs in an ocean), or the rift valleys (if it occurs on land).

This type of boundary produces new crust on Earth, and they also can split a tectonic plate into two separate plates, or even give rise to a new continent.

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2 years ago
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