Recommend using Guthook’s AT Hiker App (iOS, Android), which is quite useful if you want to pinpoint your location along the trail with a Smartphone GPS (which can still operate when it’s not connected to cell phone service.) It’s better than carrying a trail map because it’s always up-to-date and the app lets you share information with other nearby hikers (like local Wifi passwords, the location of good campsites, water availability, and shelter conditions) using a virtual trail register capability. While you can carry a paper version of the AT Guide or tear out pages from it, I refer to a PDF version of it and Guthook’s App on my smartphone. Like it or not, a smartphone has become an essential on the Appalachian Trail. (See the Appalachian Trail Cell Phone Guide)
A total of <u>20</u> amino acids compose the majority of protein in living things and nine are <u>essential</u> to human.
- All living organisms, from bacteria to people, depend on amino acids for survival.
- The same 20 types of amino acids are present in all living things.
- Only 21 amino acids are required by the human body to create all the proteins required for growth and function.
- Your body can create thousands of different types of proteins with only the same 21 amino acids because they can be ordered in a wide variety of ways.
- The body is unable to produce essential amino acids. They must therefore originate from food.
- Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are the nine essential amino acids.
learn more about amino acids here: brainly.com/question/1201532
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D, a net transfer of energy
Answer:
Bone
Explanation:
Even though they are made of tissue they are not primary.
Answer:
haemoglobin
Explanation:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body
