After taking your biology exam, you return to your car only to find that you had left the lights on and now the car battery is dead. Your friend offers to jump-start your car, but when you go to hook up the jumper cables you find that the battery terminals are covered with corrosion due to battery acid condensation. Based off your knowledge, what substance could be used to clean the corrosion?
A. baking soda (pH of 9)
B. coffee (pH of 5)
C. water (pH of 7)
D. vinegar (pH of 3)
Answer: A
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What is the key concept addressed by the question?
What will be an ideal response?
Which statement about this diagram is true?
a. The chromosomes of a human egg cell are shown.
b. The colors correspond to chromatin density.
c. The chromosomes arranged by size and order are the karyotype.
d. The chromosomes of a prokaryote cell are shown.
Prokaryotes and eukaryotes show differences in posttranscriptional modifications of mRNA. What are these differences, and why do eukaryotes show more modifications than prokaryotes?
What will be an ideal response?
Photosystem II Electrons excited in photosystem II help the chloroplast produce
a) water. b) NADPH. c) glucose. d) NADH. e) ATP.