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A student investigates phototropism in wheat seedlings. She cuts the tips off some of her seedlings. She leaves the seedlings in the window. Two days later the seedlings have bent towards the light. Describe and explain these findings.

removing tips removes auxin so growth stopsauxin collects on the shaded sideauxin causes cell elongation on the shaded sideelongation on one side causes shoot to bend to the other sidethis is positive pho...

AA
Answered by Amina A. Biology tutor
3040 Views

Solve the following simultaneous equation: x^2 + y^2 = 9 X+y=2

X 2.87 or -0.87y-0.87 or 2.87

RM
Answered by Ryan M. Maths tutor
3034 Views

Expand and simplify (x-5)(3x+3)

Begin by expanding brackets using FOIL (first, outer, inner, last) method (demonstrated on whiteboard to make clear). Multiplying the first term of each bracket gives 3x2, multiplying outer ter...

CJ
Answered by Christopher J. Maths tutor
4363 Views

Calculate the file size in bits for a two minute sound recording that has used a sample rate of 1000 Hertz (Hz) and a sample resolution of 5 bits.

First, calculate time in seconds:2 minutes * 60 = 120 secondsFile size (bits) = time (seconds) * sample rate (Hz) * sample resolution (bits)File size = 120 * 1000 * 5 bit...

JG
Answered by James G. Computing tutor
4761 Views

How to solve a simultaneous equation?

2x+3y=7 ----(1)x-y=1 -----(2)First, look at how you can eliminate one of the unknowns. Here we can multiply the second equation by 3 to make eliminate the "3y" in the first equation. We will the...

HS
Answered by Ho Sum W. Maths tutor
3011 Views

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