Biology, 17.10.2019 05:00 superfly903
Levi decides to examine the effect of fertilizer on the growth of tomato plants. he chooses four plants for his experiment and applies varying amounts of fertilizer to the three of them. he does not apply fertilizer to one plant over a 15-day period, the plants receive fertilizer on days 1,4,7,10, and 13. levi measures the height of all of his plants with a meterstick on days 3, 6, 9, 12, and 15. he also makes sure to hold all experimental factors constant except for the fertilizer. what is the independent variable in levi's experiment on tomato plants?
a. the days plant height was measured
b. the measurements of plant height
c. the days fertilizer was applied
d. the amount of fertilizer given to the plants
Answers: 2
Biology, 21.06.2019 14:40
Are characterized by dry conditions, limited vegetation and wide temperature range. a.) tropical rain forests b.) deserts c.) grasslands d.) none of the above
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Biology, 22.06.2019 16:00
Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems
Answers: 1
Biology, 22.06.2019 16:30
What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees
Answers: 3
Levi decides to examine the effect of fertilizer on the growth of tomato plants. he chooses four pla...
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