What organ is made up of cardiac muscle tissue and is vital to circulate materials around your body? PLD HELP

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Which of the following typically characterizes a tropical rainforests

What's the waste product of electrons and pyruvate combining in fermentation?