The period of human evolution has coincided with environmental change, including cooling, drying, and wider climate fluctuations over time. How did environmental change shape the evolution of new adaptations, the origin and extinction of early hominin species, and the emergence of our species, Homo sapiens? (‘Hominin’ refers to any bipedal species closely related to humans – that is, on the human divide of the evolutionary tree since human and chimpanzee ancestors branched off from a common ancestor sometime between 6 and 8 million years ago.)
How do we know Earth’s climate has changed? How quickly and how much has climate changed? One important line of evidence is the record of oxygen isotopes through time. This record of δ18O, or oxygen stable isotopes, comes from measuring oxygen in the microscopic skeletons of foraminifera (forams, for short) that lived on the sea floor. This measure can be used as an indicator of changing temperature and glacial ice over time. There are two main trends: an overall decrease in temperature and a larger degree of climate fluctuation over time. The amount of variability in environmental conditions was greater in the later stages of human evolution than in the earlier stages.
Answer:
9 pm
Explanation:
If the local mean time at 45° W is 12:00 noon, what will be the local mean time at 90°E?
Solution:
The lines of longitude run from north to south, measuring distance from east to west of the prime meridian. The line of longitude are used to measure time between different locations.
Each 15° = 1 hour, 1° = 4 minutes
Change in longitude = 45° + 90° = 135°
Change in time = 135° * (1 hour per 15°) = 9 hours
Final destination time = initial time + change in time
Final destination time = 12 noon + 9 hours
Answer:
Brainstorming
Explanation:
Brainstorming is a form of group activity , in which members of the group will gather and combine their brain power to solve a certain problem or generate a unique idea.
In general, brainstorming tend to be more efficient in group problem solving. Even if the members point out an idea that is not necessarily good, other people could potentially pick up that idea and adjust it into a better one.
During the brainstorming process, the members will be allowed to point out every small ideas that came up in their head. They do not have necessarily to worry about the complex application of the idea. That part will come later with the help of other members.
De Beers
De Beers enjoyed dominant position and control of the
diamond industry. As a result, it held control of market supply and demand
dynamics and drove the diamond prices. This was as a result of massive diamond
discovery in South Africa.
'Vassals were the lowest class in the newly established government system's hierarchy.
<h3>
What is hierarchy?</h3>
A hierarchy is an arrangement of items (objects, names, values, categories, and so on). Hierarchy is a key concept in many disciplines, including architecture, philosophy, design, mathematics, computer science, organizational theory, systems theory, systematic biology, and social sciences.
A hierarchy can connect entities directly or indirectly, and it can connect entities vertically or diagonally. In a hierarchical system, the only direct links are to one's immediate superior or to one of one's subordinates, though a largely hierarchical system can also incorporate alternative hierarchies. Hierarchical links can extend "vertically" upwards or downwards by following a path with multiple links in the same direction.
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