Some friends are trying to make wine in their basement. theyve added yeast to a sweet grape 36) juice mixture and have allowed the yeast to grow. after several days they find that sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. the most likely explanation is that

a) the yeast used the alcohol as a carbon source.

b) the mixture needs more sugar, because yeast need a lot of energy before they can begin to produce alcohol.

c) the mixture needs more oxygen, because yeast need oxygen to break down sugar and get enough energy to produce alcohol

d) the mixture needs less oxygen, because yeast only produce alcohol in the absence of oxygen

As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes

Getting out of bed is the first goal i tackle each day. 2several small goals are achieved by me as the day progresses. 3when i am riding the bus home or walking the dog, i think about the bigger goals i have for my life. which statement correctly describes the verb tense, aspect, and voice in this paragraph? a.sentences 1 and 2 contain present progressive verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice. b.sentences 1 and 2 contain simple present verbs. sentence 3 contains present progressive verbs. all three sentences use active voice. c.sentences 1 and 2 contain present progressive verbs. sentence 3 contains simple present verbs. all three sentences use active voice. d.sentences 1 and 2 contain simple present verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice.

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system