A primary source is told or written down by a person that experienced or saw the event. While, a secondary source is told or written by someone else
Answer: Karl Von Baer was an Estonian biologist and generalized the observations around embryology into laws bearing its name.
His laws indicate that the earlier we are in the embryonic phase, the closer the classes of distant organisms look to each other. As embryos develop, they diverge further from embryos of other species.
The von Baer sequence poses more problems for evolutionary mythology since natural selection cannot explain the pattern of embryonic development. Natural selection does not want to know if a trait is widespread or specific. It does not see attributes so it cannot sort them according to a special sequence.
Answer:
Option (B) is correct.
Explanation:
Economic growth is defined as an increase in the production or output of goods and services in an economy from one period to another period. According to the principle of diminishing returns to capital, if more capital employed in the production of certain goods and services and other factors of production remains the same then as a result per unit of output goes on diminishing.
Hence, this change in the production level slows down the economic growth or even stop the economic growth of a nation.
The strategy that can be used to teach letter formation would be to group the same letters that the similar pencil stroke together.
<h3>What are teaching strategies?</h3>
These are the methods that teachers use while they are teaching to get the students to understand and easily catch up on what is being taught.
These letters have the same vertical and the same horizontal lines. After you are done with this you move on to the letters that have curves.
Read more on teaching strategies here: brainly.com/question/14591988
