Which two elements are used as semiconductors for computers

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

Question 14 (5 points)all organisms on earth require energy to live. which statement best describes how ferns, people, and flatworms obtain energy? a. ferns produce atp during photosynthesis, while flatworms and people produce atpduring digestion. b.ferns and flatworms absorb food from their surroundings, while people must digest foodfound in their surroundings. c.producers such as ferns do not require a source of energy, while flatworms and humansmust consume food for energy. d.ferns produce glucose that can be broken down by cellular respiration, while flatwormsand people digest foods containing glucose for use in cellular respiration.