1. the carboxylic acid group which contains carbon and oxygen
2. the amino group, which contains nitrogen and hydrogen
3. the r group which varies with each amino acid
1. is C. because the furthest humans have traveled in space is to the moon.
2. is true, as long as the spacecraft has some repairs, because the heat will cause some damage to the exterior.
3. is C. because unmanned spacecraft have successfully landed on mars, while manned spacecraft have only made it to the moon, so far.
Answer:
Lipids, Proteins, and carbohydrates
Explanation:
I did this once and I got it right, I hope you get it right too
There are many digestive problems involving the esophagus (e.g. achalasia, squamous cell carcinoma of the esophagus, etc), but one of the most common esophageal diseases are heartburn or reflux disease also known as gastroesophageal reflux disease or GERD. GERD is characterized by the backflow of the stomach acids to the distal end of the esophagus causing damage and erosion. In chronic cases of GERD, the epithelium of the esophagus transforms from stratified squamous to columnar with goblet cells and this is called columnar metaplasia or Barrett's esophagus. This can predispose the patient to the risk of developing esophageal adenocarcinoma.
Answer:
My guess would be an energy source, water, and an atmosphere.
Explanation:
Whatever lives there is going to need energy and water to survive. The atmospheric layer will protect the planet like ours protects Earth. Hope this helps! :)