In green plants, which photosystem absorbs photons to excite electrons in the reaction center?

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

What does homeostasis means in biology?

Donde se encuentra el adn nuclear en un organismo eucariota?