Which is true about africa?
a. apartheid is the official policy of africa
b. europe controls most of african nations today
africa is governed by the imf
d. the sahara desert forms a cultural barrier in africa

d. the Sahara desert forms a cultural barrier in Africa

Explanation:

The vast Sahara certainly plays the role of a cultural barrier, blocking the North-South exchanges on that huge continent.

a. apartheid is the official policy of Africa : today?  False, that ended in 1994.

b. Europe controls most of African nations today.  No, at least not politically.  China is a bigger player in Africa now than most European countries with massive investments.  Most European colonies got their independence 50-60 years ago.

c. Africa is governed by the IMF  IMF is an economic institution, it doesn't control or rule any country.

d. the Sahara desert forms a cultural barrier in Africa

Explanation:

The vast dune and ocean of sands that forms the prominent Sahara desert serves a big cultural barrier on the African continent.

Geographically, South of the Sahara lies huge expanse of tropical rainforest and the Atlantic. Going northward we see Mediterranean climate.

Culture is the way people live. The Sahara is home to diverse cultures. The Magrebs, Bendouins, Arabs are some of the dominant tribes. These cultures are very uinque in that the people are mostly nomads. They carry their animals about looking for pastures and water.

To the South lies the Yoruba, Ashanti etc. These cultures are rooted in farming as a means of food production.

Their cultures a quite distinct from the northern nomads.

Going from North to South we see distinct cultures and people.

Thus question lacks a picture or option, but nevertheless:

Answer:

There are 3 types of friction:1) Static friction - when you apply force and the object does not move.2) Sliding friction - when the surface if the object moves on other.3) Rolling friction - when any wheel or ball moves on any surface rolling friction is applied. it is very less than sliding friction.

If it's an open question, then 

Answer:

When it comes to areas that humanity does not affect in terms of vegetation, colder areas such the Tundra come to mind.

The Tundra is known for:

- Very cold climates

- Low number of animals and plants

- Limited sunlight

As a result of the cold weather and the limited number of plants and animals in the tundra, humans generally avoid this environment which ensures that there is little effect of humans on natural vegetation patterns.

In conclusion, tundra areas do not see a lot of human influence on vegetation.

Options:

A. They standardize prices for commodities in global markets 

B. They streamline the process of organizational decision making. 

C. They force organizations to reach a consensus before making decisions 

D. They provide a forum for individuals to voice discontent with organizations.​

Answer:

B. They streamline the process of organizational decision making. 

Explanation:

A geographic information system (GIS) is a type of database containing geographic data (that is, descriptions of phenomena for which location is relevant), combined with software tools for managing, analyzing, and visualizing those data. In a broader sense, one may consider such a system to also include human users and support staff, procedures and workflows, body of knowledge of relevant concepts and methods, and institutional organizations.

Answer:

The article states that the Incas developed knowledge of farming in the Andes region over the course of 11,000 years. This information shows that they refined their farming practices over time. The use of gravel, terraces, and canals allowed the Incas to adapt farming to the difficult terrain.

Answer:

When birds are hungry, they will peck unripened fruit. Also, if there is no other fruit around, the birds might go after unripened fruit. Heavy bird pecking can be used as an indicator that it's ready to start harvesting.

Birds need food to eat, and plants need to disperse their seeds. Fruit-eating animals are called frugivores, and birds are the most important frugivores of all. More than 300 trees, shrubs, and vines in North America have small fruits that depend on birds for seed dispersal.