What fictional planet does the writer compare Kepler-16b to? Pluto
Lyra
Tatooine
Cygnus

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.