cohesion-tension theory

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Transpiration pulls water in a continuous column. Works because of osmotic potential

Biology & Microbiology

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Diatoms are characterized by ____, and are the source of economically useful_____

a. calcium carbonate shells; ozone b. calcium carbonate sheaths; petroleum c. silica shells; diatomaceous earth d. silica sheaths; limestone e. silica carbonate shells; diatomaceous earth

Biology & Microbiology

What factors contribute to genetic variation in populations?

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Biology & Microbiology

Skeletal systems can serve all of the following purposes except:a

protection. b. allowing for movement. c. attachment for muscles. d. storage. e. contraction.

Biology & Microbiology

Match the letter of each example from childbirth to the appropriate component of a positive feedback loop.A. Pituitary gland secretes oxytocin, which acts on the uterusB. Uterine contractions increaseC. Fetus is pushed against uterine openingD. Receptors detect stretchE. Brain receives and compares stretch informationEffector

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Biology & Microbiology