A channel protein serves as a tunnel across the membrane into the cell. More specifically, channel proteins help molecules across the membrane via passive transport, a process called facilitated diffusion. These channel proteins are responsible for bringing in ions and other small molecules into the cell
This is known as the double helix.
There are no directions…
The correct word to fill the gap would be indirect.
In other words, an indirect survey makes use of evidence, such as the footprints left behind by animals, to follow animals that are difficult to track.
Ecological surveys are of 2 types:
Direct ecological surveys have to do with studying phenomena directly and recording whatever that is observed.
Indirect surveys involve an indirect way of studying phenomena. The signs left by phenomena are observed and logically used to make deductions about such phenomena.
More on ecological surveys can be found here: brainly.com/question/1182023?referrer=searchResults
Answer: C. <em>Nick believes he did well on the exam because the exam was easy.</em>
Explanation:
Nick is relating his performance on the exam to an external factor (the difficulty of the exam being easy).
All the other answers are relating the exam to internal factors such as intelligence, personal knowledge, and effort.