Modern humans started spreading from Africa to Europe, Asia, and Australia some 100,000 years ago – a process that took about 70,000 years. We also know that at some point in the past 25,000 years, a group managed to reach America from Siberia at the end of the last ice age.
However, exactly when this occurred and which route these early pioneers took has long been debated. Now new research based on ancient DNA and plant remains from lake deposits, published in Nature, is finally helping us to answer these questions.Lake sediments can help shed light on the plant and animal life of this period because the successive layers of sediment allow us to step back in time to reveal a history of past environments. The researchers recovered sediment cores dating back to almost 13,000 years ago from an area of the corridor which is thought to be the last to become ice-free. Identification of the pollen grains and small fragments of plants in sediments are important in revealing vegetation development.
The answer is letter B. Stress can emerge from both positive and negative events. Stress is being perceived by individuals differently and this depends on how they react to certain abnormal situations that can either harm or overwhelm them. Individual too have a different way in coping up their own stresses.
Answer:
B) regression
Explanation:
The theory of regression states that the worth of a much more expensive home will reduce due to less expensive homes entering the area. Therefore, if your property is worth $1,500.00 and you're flanked by $1,000,000 houses, the value of your house is moving down.
<span>Natural Resources of the middle colonies included good farmland, timber, furs and coal. Iron ore was a particularly important natural resource. </span><span>The Middle colonies are often called the breadbasket colonies because they grew so many crops, especially wheat.</span>
It was in 1931 when Japan began its occupation in China outside of Manchuria. This was during the time that Japan considered Manchuria as a great source because of its natural resources. Japan thought that this would lead to a great industrial development and the chance to acquire great power.
