Choose any two developments form timeline 1 and 2 at the end of this chapter and discuss why do think these are significant?
Answers
Answer:
Developments in timeline 1 and 2 are given below.
Explanation:
Timeline 1 developments:
a. Hominids emerged on the earth’s surface about 5-6 million years ago and as they evolved from Homonids, they developed a few differences along with some similarities. Homonids had a larger brain and walked on four feet. Hominids after evolution, walked on two feet and had a upright posture. This also helped them in making tools.
b. Ice age brought a lot of changes in the climate and vegetation on earth. Because of reduction in temperatures, grassland did not grow.
Timeline 2 Developments:-
a. There was evolution of voice box around 200,00 years ago. Because of this human were able to express themselves and speak.
b. Sewing needles were invented which helped them sew clothes and wear them which prevented them from harsh climates. It was also possible to sew animal fur because of this invention.