Answer: a temporary marked decrease in the birth rate.
Explanation:
Answer:
Before being elected to the presidency, Jackson gained fame as a general in the United States Army and served in both houses of the U.S. Congress. An expansionist president, Jackson sought to advance the rights of the "common man" against a "corrupt aristocracy" and to preserve the Union.
Answer:
2 in 4 children will have normal finger
Explanation:
a cross between the gene for normal finger bb and the gene for brachdactyly Bb will give the result below;
Bb, bb, Bb and bb.
thus 2 in the 4 have normal fingers.
The question is extremely vague. “Ancient” covers a large period of time that had varied technologies. “Communication” is also a very vague term. That being said, I will attempt to give an answer.
I am assuming that you are asking about human communication. One of the things that distinguishes humans from animals is speech. Probably the most ancient means of communication was speech. Hand gestures, body language, and facial expressions are also a means of communication. Dance and music were also very ancient means of communication.
Messengers with verbal messages, signal fires, totems, banners, cave art, etc. were ancient means of communication that predate history.
Proto alphabets and pictographs were used as early as 60,000 years ago. Such script was found on egg shells dating back that far and found in southwestern Africa.
Genuine writing began as early as 5,000 years BC with the Vinca script (although this is disputed). It is undisputed that cuneiform script was in use in what is now Iraq about 3,000 BC. This early writing was typically impressed on clay tablets and allowed to dry. Small tablets could be transported between distant locations. Some script was also present on pottery. Rudimentary codes were used for distant communication with signal fires. Drums could be heard at great distances and were also used to communicate. Once paper was invented, things really took off, literally. Messenger pigeons were used as early as 1150 in Baghdad and also later by Genghis Khan. This ancient means of aerial communication was still in wide use in World War I.
More common were couriers on horseback that would take written messages quickly between people at distances. In ancient Persia (Iran) they had messengers, called angros that would carry messages in stations that had a day's ride distance along the royal road. The riders were exclusively in the service of government. A message could be transported from Susa (south western Iran) to Sardis (western Turkey), a distance of 1,677 miles in just seven days. The same journey took ninety days on foot. This type of system was later used by the Romans. Messages were also transported by boats and ships.
Even ancient communication could be relatively fast.
A social Psychologist referred to social loafing as the situation when only three of the four actually do the required work for a group presentation.
Social loafing is a phenomenon in psychology where people work less or exert less effort towards the particular goal of the group while working in a group. Social loafing may not seem visible while calculating the team performance as a whole, this phenomenon occurs when an individual's work is taken into consideration because, in the group, some members actually do the required work while others put less effort leading to the situation of social loafing.
The larger the group, the fewer effort members exert and the more clear social loafing experienced. In this condition, other members have to come forward in order to compensate for the work left by low members.
To learn more about social loafing, follow the below link:
brainly.com/question/7239656
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