Which of the following statements is true?
aWater and energy are not recycled in an ecos...
Biology, 13.02.2020 18:51 lanakay2006
Which of the following statements is true?
aWater and energy are not recycled in an ecosystem.
bWeathering is the main way phosphorous is recycled.
cThe total amount of energy in an ecosystem continuously increases.
dThe organism at the top of a food chain receives the most energy from the sun.
Answers: 1
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What is an example of a scientific question that galileo could not have answered with out this new tool?
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Biology, 22.06.2019 19:30
On a backpacking trip, kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 calories. at the school track, janelle runs the 100-meter sprint in 13.5 seconds, burning 10 calories. afterward, janelle’s leg muscles are aching and she is breathing hard, while kenny maintains normal breathing all day, even though he burns 400 times more calories than janelle. which two statements offer the best explanation for this phenomenon? a. if the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and "oxygen debt." b. aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting "oxygen debt." c. after about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce atp, resulting in "oxygen debt." d. the rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.
Answers: 3
Biology, 23.06.2019 00:10
What occurs during translation? a. mrna is created by using a dna template b. mrna codons are joined by trna anticodon to assemble amino acids to form a protein c. protein is formed when a polypeptide chain is broken apart and released from ribosome d. one strand of dna is copied into a strand of rrna
Answers: 1
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