Answer:
The correct answer is -
1. due to the fact that maize is a monoecious crop that has male and female flowers in separate parts of the same plant that distributed pollen by the wind to other female parts of another maize plant.
2. Once silks are visible, they may already be contaminated with foreign pollen, so it is vital that ears shots are bagged before the emergence of silks.
3. If silks have emerged before bagging which means they are already been contaminated with other pollen and which will affect the process of hand pollination and have other varieties than desired.
The Sahara Desert in northern Africa is the largest region in the world having the BWh climate. Name another desert in each of the northern and southern hemispheres having the BWh climate.
Southern Hemisphere:
Northern Hemisphere:
Answer:
Northern Hemisphere: Thar desert
Southern Hemisphere: Great Australian desert
Explanation:
The BWh climate is a desert climate. It is a hot and arid climate o the deserts, as classified by the Köppen climate classification of BWh and BWk. The BWh zone falls on the hot and arid regions.
One desert in the Northern hemisphere which contains BWh climate is Thar desert in India. It is a very hot desert with very sandy and rocky surfaces.
One desert in the Southern hemisphere having BWh climate is the great Australian desert. It is a sandy desert with very less precipitation.
The half-life of Carbon-14 is 5, 730 years. you find a sample where 1.5625% of the original Carbon-14 still remains how old is that sample ?
Answer:
The sample is about 34380 years old.
Explanation:
The amount of Carbon-14 mass diminishes exponentially in time, whose model is described below:
[tex]\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }[/tex] (1)
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (2)
Where:
[tex]m_{o}[/tex] - Initial mass, in grams.
[tex]m(t)[/tex] - Current mass, in grams.
[tex]t[/tex] - Time, in years.
[tex]\tau[/tex] - Time constant, in years.
[tex]t_{1/2}[/tex] - Half-life, in years.
If we know that [tex]\frac{m(t)}{m_{o}} = \frac{1.5625}{100}[/tex] and [tex]t_{1/2} = 5730\,yr[/tex], then the age of the sample is:
[tex]\tau = \frac{5730\,yr}{\ln 2}[/tex]
[tex]\tau = 8266.643\,yr[/tex]
[tex]t = - \tau \cdot \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = - (8266.643\,yr)\cdot \ln \frac{1.5625}{100}[/tex]
[tex]t \approx 34380.002\,yr[/tex]
The sample is about 34380 years old.
explain in your own words the three mechanisms that cause air to be displaced into the atmosphere
Answer:
orographic, convectional and cyclonic lifting
Explanation:
orographic is when air mass is forced from lower to higher elevation. convectional lifting is warming up parcel of air at the surface of the earth by conduction. cyclonic lifting is lifting of air mass due to differences in pressure this is when cold air meets warm air.
The three mechanisms that cause air to be displaced into the atmosphere are orographic, convectional, and cyclonic lifting. This is further explained below.
What is air displacement?Generally, Air displacement is simply defined as plethysmography a well-known and scientifically confirmed method of measuring human body composition.
In conclusion, orographic, convectional, and cyclonic lifting affect air displacement now try to rephrase them to aid your essay.
Read more about the atmosphere
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Which of the Earth's spheres is made up of the gases and air that surround the Earth and sustain life?
A. the hydrosphere
B. the lithosphere
C. the biosphere
D. the atmosphere
Please select the best answer from the choices provided
B
ОООО
Answer:
D. the atmosphere
Explanation:
I'm correct if I'm rwong:,)
Question 1
Modern scientific theories are NOT:
simple
testable
continuously tested.
perfect
elegant
Answer:
perfect
Explanation:
by elimination:
modern scientific theories are testable n continuously tested
they can be simple n elegant
but they are NOT perfect
Answer:
Explanation:
Modern scientific theories are NOT: simple, elegant, nor perfect.
agent of soil erosion that contribute to the transportation of sediments through ground digging
Answer:
liquid Wake is the major agent of erosion on Earth. rain, river, floods, lake, and the ocean carry away bit of soil and sand slowly wash away the sediment
A rectangle and a square have the same perimeter, the rectangle with a length 8cm has an area of 32cm.find the length of each side of the square
The length of one side of square is 20
DAT Explain the significance of resouras. Suggest any three ways to conserve resources to achieve sustainable. development
Answer:
Explanation:
Resources may be explained as a range of products, equipment, manpower and all other things an individual or organization has at its disposal in other to function prey and effectively.
Resources may also be natural which will include all resources borne out of nature such as air, sunlight, mineral resources and all resources devoid of human doing.
Resources are required on other to ensure that an organization functions well as it will be impossible to produce without the needed help (resources). Similarly, it will be impossible to survive without the availability of nature resources as they help us breath, make money, in food production and so on.
Resources conservation involves the effective and efficient use of resources. Conservation of resources can be enhanced in ways such as :
Embracing the use of renewables : The use of renewable energy sources provides a clean choice of energy which is obtained from nature's routine. The use of solar energy frolic the sun or wind powered energy obtained from natural breeze or wind.
Embrace Recycling : Recycling involves the reuse of already used materials as a form of raw material to make new products, these ensures that optimum use of the resources at our disposal is achieved while also ensuring that we have a cleaner environment.
Use of reusable goods or materials : The large influx of onr-tine use products such as disposables and certain plastic materials has contributed to large quantities of water materials on landfills, they adoption of reusable materials which can be used over certain period of time will go a long way in controlling these waste Influx.
during
The African American population of cities in the northern states
the
A. increased; Great Migration
B. decreased; American Revolution
c. decreased; Great Migration
D. increased; American Revolution
Answer:
A. increased; Great Migration
Explanation:
When the migration began, 90 percent of all African-Americans were living in the South. By the time it was over, in the 1970s, 47 percent of all African-Americans were living in the North and West. A rural people had become urban, and a Southern people had spread themselves all over the nation.
2. Enumerate the effects of the rotation of the Earth on its axis.
Answer:
The spinning of the earth on its axis causes days to turn into nights. A difference of one hour is created between two meridians which are 15 degrees apart. A change in the direction of wind and ocean currents. The rise and fall of tided every day.
Answer:
Effects of the Earth's rotation are: The rotation of the Earth causes the day and the night. ... The speed of rotation also affects the movement of the wind. Due to rotation, winds and the ocean currents deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
Question 2 of 20
Which accurately describes apartheid?
A. It was started by Nelson Mandela.
B. It ended due to international pressure.
C. It kept the majority white population in power in South Africa.
D. It ended in the early 20th century.
Answer:
it ended due to international pressure.
Understanding Coordinate Systems
1. Geographic coordinates appear at the four corners of the USGS map. What are the values of latitude and longitude lines that enclose the Yellow Rock East map? (1) Top: Left: Right: Bottom:
2. UTM Zone 1 runs from 180°W to 174°W. The Four Corners region lies in UTM Zone 12N. What is the range of longitude degrees covered by Zone 12N? (1)
3. How many SPCS zones are in California based on NAD 83 (SPCS 83)? (1)
Answer:
Explanation:
A coordinate system is a used as one r more coordinate to uniquely determine the position and points and the other coordinates on the map. The yellow rocks lies at an latitude of 33 41' and 150 37'
explain 10 problems of resource development?
Explanation:
most of the resources are limited in supply.
most of the resources are unevenly distributed over the country.
over - utilisation of the resources may lead to pollution of the environment.
there is a beed to plan the human resources because only then we would be able to develop our natural resources
In the Layers panel, turn on Borders and Labels and also Gallery > Volcanoes, then double-click on the Problem 7 placemark. Divergent boundaries often begin as triple junctions composed of three rift "arms" at ~120° apart (which may or may not evolve into divergent boundaries). Knowing that rifts (red lines) generally open perpendicular to the rift (or sub-parallel to the light blue transform faults), which of the statements below about this area is incorrect?
a. the NW-trending Red Sea is a linear sea that is opening in a NE-SW direction
b. the ENE-trending Gulf of Aden is a linear sea that is opening in a NNE-SSW direction
c. the volcanoes in Africa define a narrow linear rift that is opening in a NW-SE direction
d. the volcanoes in Africa define a volcanic arc related to subduction off Africa's east coast
Answer:
d. the volcanoes in Africa define a volcanic arc related to subduction off Africa's east coast
Explanation:
Many crust plates move over the mantle. These plates are limited by three types of ridges or borders that differ in the movement they produce.
Boundaries types: Divergent, Convergent, and Transforming.
Divergent boundary: Occurs along with an underwater mountain range, known as the mid-oceanic ridge or divergent ridge. New crust is created by the molten materials rising from the mantle. The two plates at each side of the rift separate, and the stream of hot material creates a new seabed between them. It occurs an expansion of the sea bottom, which separates the plates. The divergence direction is transversal to the rift orientation. Old plates get separated, and the new crust instantaneously gets formed. The emerging mantle occupies the space left by the separation of the two plates.
a. the NW-trending Red Sea is a linear sea that is opening in a NE-SW direction. CORRECT → The diverging direction is perpendicular to the rift orientation.
b. the ENE-trending Gulf of Aden is a linear sea that is opening in a NNE-SSW direction. CORRECT
c. the volcanoes in Africa define a narrow linear rift that is opening in a NW-SE direction. CORRECT.
d. the volcanoes in Africa define a volcanic arc related to subduction off Africa's east coast ⇒ INCORRECT. The collision between plates creates volcanic arches and continental arches. This process belongs to the convergent boundaries, in which two oceanic plates collide, or one oceanic plate crushes with a continental one.
Using a pen, draw a line exactly along the contact (boundary) between the Vishnu Schist and the relatively horizontal sedimentary rocks above it. 2. What specific kind of unconformity did you trace above
Answer: Hello some parts of your question is missing attached below is the missing detail
answer :
1) attached below
2) Non-conformity
Explanation:
1) Line along the boundary between Vishnu schist and relatively horizontal sedimentary rocks
attached below
2) The type of unconformity traced above is called Non - Conformity
i.e. when a sedimentary rock lies above an igneous rock or a metamorphic rock it is called Non-conformity
Marble and Quartzite can be similar in appearance. Name two simple ID techniques that can be used to differentiate between the two?
Answer:
The scratch test (also known as Mohs Hardness scale) is a way you can test a mineral or stones for its endurance. The minerals you test are scratched by a penny and are measured on a scale of 1-10 on how durable they are. Stones such as quartz have a much stronger endurance to a scratch in the test than marble because of quartzes makeup. Another way to differentiate between the two would be to look at the mineral’s luster. The luster of a mineral is the way the light bounces off of its surface. There are different lusters that different minerals give off. There are two major types of lusters and they are Metallic or nonmetallic. A metallic luster is typically shiny while a nonmetallic luster can have many different types like musty or solid. Because quartz is a quartz it will be metallic because it is shiny while marble will be nonmetallic because it does not reflect light.
I hope this helps! :D
The major physiological division of Ethiopia
Answer:
Western Highlands, the Western Lowlands, the Eastern Highlands, the Eastern Lowlands, and the Rift Valley.
Explanation:
There are five major physiological division of Ethiopia i.e. the Western Highlands, the Western Lowlands, the Eastern Highlands, the Eastern Lowlands, and the Rift Valley. Ethiopia is a country which is rich in geographical diversity. It comprised of rugged mountains, flat-topped plateaus, deep gorges and river valleys. Erosion, volcanic eruptions and tectonic movements are the causes that contributed to the diverse topography Ethiopia.
Ocean life appears to be affected by a relatively small number of variables such as temperature, density, available sunlight, available nutrients. If any one of these variables changes how do you think it might it impact the human food web?
Answer:
A change in one of these variables can cause a population decrease in some living being that has the ocean as its habitat. This decrease would affect the feeding of animals that consume this living being and this will disharmonize the entire food chain of consumers above this living being.
Explanation:
Although the ocean is affected by a relatively small number of variables. These variables are essential for the maintenance of living beings within the ocean. If one of these variables is modified, in the long term, many species of living beings can be negatively impacted in an intense way, even having their survival in danger and decreasing their population density. This would be very harmful to the harmony of food chains within the ocean. That's because, as you may already know, the food chain is a feeding sequence between living beings, where one species feeds on another, which shows how one species depends on the other to survive.
Thus, if there is a change in the variables that act on the ocean and this change causes the population reduction of a species of living being. The species of animals that feed on this living being will also be affected as they will not have enough food to sustain themselves. Isss will decrease the population density of this second species, affecting the species that will feed on it, and so on.
g Although the Humid Continental and Marine climates are at similar latitudes, they have very different annual temperature ranges. What factor is responsible this difference
Answer:
nearness to sea or ocean
Explanation:
Presence of water body is the factor that is responsible for the difference in annual temperature although the Humid Continental and Marine climates are present at the same latitudes. Marine climates are located near the water bodies such as ocean or sea while on the other hand, Humid Continental climates are located farther from the water bodies such as sea or ocean.
Paul is filling out the Natural Hazard Disclosure Statement. Which of the following conditions is Paul not required to report on this form? Lead-based paint was used in the home. The property is in an area that could flood. The home sits on an earthquake fault zone. The property is in a state fire responsibility area.
Answer:
The answer is lead-based paint was used in the home
Explanation:
Ice crystals in the Bristol Glacier are 1 mm long. The crystals in the Camden Glacier are 0.5 mm long. Which of the following statements is true?
The Bristol Glacier is larger than the Camden Glacier.
The Bristol Glacier is older than the Camden Glacier.
The Bristol Glacier moves faster than the Camden Glacier.
The Bristol Glacier is closer to the North Pole than the Camden Glacier.
The correct answer is B. The Bristol Glacier is older than the Camden Glacier.
Explanation
The formation of glaciers has three stages. The first is the accumulation in which the snow falls in one place and accumulates there and forms the glacier. The second is compaction in which new layers of snow accumulate on top of the first ones, compacting the lower layers. The third is crystallization in which pressure and air cause snow to crystallize into glacial ice. Therefore, the age of a glacier can be known by its length, the older is the longer glacier. According to the above, if the length of the Bristol Glacier is greater than that of the Camden Glacier, it is because it is older. Then the correct answer is B.
Earth's 3 principal layers that are divided into:
A. Crust, Upper Mantle, Lower Mantle, Liquid Outer Core, and Solid Inner Care
B. Crust, Upper Mantle, Corona, Radiative Zone, Core O
C. Crust, Upper Mantle, Lower Mantle, Mid-Atlantic Ridge, East Pacific Rise
D. Crust, Subduction Zone, Convergent Boundary, Solid Inner Core
Why could France be thought of as an island?
Answer:
When persecution started again in France in 16th century, the English decided to use the islands to exfiltrate protestants from France. The Huguenots (French protestants) brought with them this new faith in hard work, soon making the islands a wealthy and even more religious place
The 'Eye' of the tropical cyclone is usually the calmest portion of the storm characterized by low winds and even the blue sky. The reason that the eye is calm because
Answer:
The answer is: the now strong surface winds that converge towards the centre never reach it.
I need an answer now ♀️
Explanation:
1=d
2=c
3=b
4=e
5=a
6=h
7=f
hope this helps u
Find the slope of a line parallel to a line that contains the points (9, -3) and (-3, 8).
Answer:
[tex] Slope, \ m = \frac {11}{-12} [/tex]
Explanation:
Given the following points;
Points on the x-axis (x1, x2) = (9, -3)
Points on the y-axis (y1, y2) = (-3, 8)
To find the slope of a line parallel to a line;
Mathematically, the slope of a line is given by the formula;
[tex] Slope, \ m = \frac {Change \; in \; y-axis}{Change \; in \; x-axis} [/tex]
[tex] Slope, \ m = \frac {y_{2} - y_{1}}{x_{2} - x_{1}} [/tex]
Substituting into the formula, we have;
[tex] Slope, \ m = \frac {8 - (-3)}{-3 - 9} [/tex]
[tex] Slope, \ m = \frac {8 + 3}{-3 - 9} [/tex]
[tex] Slope, \ m = \frac {11}{-12} [/tex]
Therefore, the slope of the parallel line is -11/12.
What is air transport?
Answer:
Look at the explanation.
Explanation:
The movement of passengers and cargo by aircraft such as airplanes and helicopters. Air transportation has become the primary means of common-carrier traveling. ... Air transportation also provides a communication or medical link, which is sometimes vital, between the different groups of people being served.
Hope this helps!
how to prepare 10% of diastase solution?
Answer:
Add 10 grams of pure diastate to 90 grams of water.
where is Liberia's location in Africa?
Explanation:
liberia is located in west africa
Geological evidence indicates there was once a warm tropical climate in what is now New York State. Other evidence shows that millions of years later, huge ice sheets covered the state. Which of the following statements can be concluded from the information above? (1) Climates of the future will always be as they are today.
(2) The size and shape of the oceans remain constant through time.
(3) Glaciers are limited to the polar regions.
(4) There have been considerable climatic fluctuations in the past.
(5) An ice age always follows a period of tropical climatic conditions.
Answer:
I think the answers are: (3) and (4)
Answer:3
Explanation:
