Scientific theories are not absolute and unquestionable truths: they are the best explanation of the data, but they can be challenged if new data is discovered or if a new theory is found that fits to and explains the data even better!
The best answer is d: this is not an accurate description of a scientific theory!
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The correct option is IT CAN FORM FOUR COVALENT BONDS.
Carbon is capable of forming four covalent bond in order to attain the octet form, this gives it the ability to combine with different elements in different ways. The ability to combine with different elements makes carbon to be abundant on the earth, because it is found in variety of different substances.
Answer:
The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.
Answer:
Option C
Explanation:
Gastrocnemius and soleus muscles are jointly known as calf. Gastrocnemius is the larger muscle and connects to the knee joint while soleus is smaller muscle that connects to the portion of leg just below the knee. When gastrocnemius is stretched, the knee remains straight while when the soleus is stretched the knee bends. If a person feels difficulty in bending or stretching the knees, he/she must be facing the problem with the calf muscle. Hence, Option C is correct
