2 A student investigated the diffusion of substances through Visking tubing, an artificial membrane which has some of the properties of cell membranes. The student made a bag of Visking tubing as
shown in the image. The student added some iodine solution to the water in the test-tube. After 30
minutes at room temperature, the contents of the Visking bag were stained blue-black, but the
water outside remained a yellow colour.

idk bruh

Explanation:

the correct answer is - ability to find a mate

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