Which is true about breathing while you exercise? A. You should always hold your breathe when you are working hard. B. If you start breathing fast, you should hold your breath to slow it down. C. If you begin to take deep breaths while you exercise, you should stop because it means you are about to pass out. D. The rate and depth of your breathing changes while you exercise to keep a constant level of blood oxygen and carbon dioxide.

D

Explanation:

A-NOT A U SHOULD NEVER HOLD YOUR BREATHE WHILE EXECISING.

B- NOT B HOLDING YOUR BREATHE DOESNT FIX FAST BREATHING

C- NOT C JUST BECAUSE YOUR BREATHING HEAVY DOES NOT MEAN YOUR ABOUT TO PASS OUT.

D- YES!!! BECUAE THE RATE YOU OUGHT TO BE GOING DETERMINES YOUR LEVEL OF CARBON.

Explanation:

D! hope this helps:) brainliest is appreciated.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

read more on -

explanation: