External respiration (correct answer) involves the exchange of oxygen and carbon dioxide within the environment.
The exchange of wastes through the skin is just called excretion by sweating.
There is no exchange of nutrients that occur in the lungs but rather absorption of nutrients is the function of the gastrointestinal tract.
The exchange of oxygen and carbon dioxide within the cell is called cellular respiration and involves carrying oxygen from the blood to the cell then the cell uses it as the final electron acceptor in the electron transport chain. The metabolic wastes of the cell, primarily carbon dioxide, goes now to the bloodstream to be exchanged for oxygen in the lungs.
The correct answer is E. He will not readily reveal his feelings.
Reticent can be defined as a person who does not like to talk.
Reticent has different meaning. For example, It can be termed to somebody who is formal and restrained, Somebody who is not able to draw attention to oneself, and also reticent can also refer to a person who refers to seclusion to others.
An e.coli cell without a functional laci gene is expected to always produce B-galactosidase. i found the answer to this question on a set of quizlet flash cards. i have provided the link below in case you would want to look at the flash cards for reference.
https://quizlet.com/62335789/genetics-important-concepts-flash-cards/
Digestive System. Its what makes you bm. And your bm is waste
Answer:
Index Fossils can be used to identify a specific time period.
Explanation: