I believe it is D. More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.
Answer: The primary motor cortex for control of voluntary muscles is found in the precentral gyrus of the frontal lobes.
Explanations:
The primary motor cortex is one of the important brain areas involved in motor function. It is found in the precentral gyrus of frontal lobes. It control voluntary muscles and generate impulses needed for movement execution.
Voluntary muscles are muscles that we can control consciously or we can control them at will and we can choose when we want to use them. They are also refers to as skeletal muscles and are attached to bones. The are majorly use for locomotion.
The purpose of control group 2 is to determine if the new drug was a possible method for getting well, i.e., option B.
<h3>What is way of testing medicines?</h3>
In a laboratory, drugs are first subjected to non-human tests. These laboratory tests are performed to determine a level of safety.
The results of these tests are then submitted to the United States Food and Drug Administration (FDA), which determines whether the treatment is safe enough to be studied in human volunteers.
There are various phases involving discovery, clinical trial, review, and safety monitoring.
The purpose of control group 2 is to determine if the new drug was a possible method for getting well
Thus, the correct option is B.
For more details regarding drug testing, visit:
brainly.com/question/11332268
#SPJ1
In my opinion, humans have influenced climate change because it has been shown that deforestation, industrial activities and urbanization increase the level of greenhouse gases.
<h3>What is global warming?</h3>
The expression global warming makes reference to the sudden increase in temperatures around the world after the industrial revolution.
In this regard, it has been shown that greenhouse gases such as CO2 can increase global warming and human activities may be associated with this process.
In conclusion, in my opinion, humans have influenced climate change because it has been shown that deforestation, industrial activities and urbanization increase the level of greenhouse gases.
Learn more about global warming here:
brainly.com/question/3553382
#SPJ1
