The independent variable should be the plants you used.
Answer: soil tests are most useful during the growing season to monitor plant nutrient uptake.
Explanation:
The plasma membrane separates the inside of a cell from the outside environment. it is made up of a phospholipid bilayer composed of hydrophilic heads (water loving) And hydrophobic tails ( water hating).
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Answer:
D. Mutually beneficial: the bee receives pollen and the flower gets help with its reproduction
Explanation:
It is a mutually beneficial relationship because the flower provides the bee with nectar and pollen. Also, the bee provides the flower with a means to reproduce by spreading pollen from flower to flower through pollination.
Possibly because preditors hiding in sand