Which of the following is an important role of phosphorus in biology?
A) It is an essential component of ATP, which stores the energy acquired in the light reaction phase of photosynthesis.
B) It allows increased amounts of energy available to organisms.
C) It is an important component of proteins.
D) All of these are roles of phosphorus.
D) All of these are roles of phosphorus.
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What aspect of Titan may hold clues as to what Earth was like before life arose here?
A. an intriguing soup of organic molecules B. the rate of radioactive decay of its inner core C. its intense volcanic activity D. its expansive liquid oceans
Prior to the 20th century, geography was closely associated with ________
Fill in the blank(s) with correct word
steroid hormones
What will be an ideal response?
The soil at the base of a hill slope is likely to be ____ compared to the soil on the slope.
(a) thicker (b) wetter (c) more nutrient-rich (d) all of the above