Lex decides to examine the effect of fertilizer on the growth of tomato plants. Fie chooses four plants for his experiment and applies varying amounts of fertilizes to three of them. He does not apply fertilizer to one piant.
Over a 15-ay period, the plants receive fertilizer on Days 1, 4, 7, 10. and 13. Les measures the height of all of his plants with a metersick
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 Lexi's experiment on tomato plants?
the amount of fertilizer given to the plants
the days fertilizer was applied
the days plant height was measured
the measurements of plant height

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )