First one who answers this correctly will be , five stars, and marked !
what characterizes the precambrian era?

a) abundant plants and animals

b) dinosaurs

c) small, one-celled organisms and primitive jellyfish

d) extensive mountain building

Idont understand by supporting the plant and holding the leaves up to the light. question 3 options: tap or fibrous root flower petals herbaceous or wood stems leaves with stomata

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).