Which two organ systems work together to inhale oxygen? a. cardiac and muscular b. cardiac and respiratory c. respiratory and muscular d. respiratory and skeletal

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Which codon is the code for the amino acid histidine (his)?

What part of the brain is highlighted in the diagram below?