Which of the following statements are true for first-order analyses of nmr spectra (the type of analysis most commonly done).
a. the spin-multiplicity of the proton nmr absorption of the methylene group in ethanol-od is 4.
b. the difference in absorption frequency is equal to or less than 6 j.
c. carbon-13, an nmr-active nucleus, has a nuclear spin quantum number of 0.
d. first-order multiplets are symmetrical, and their chemical shift is given by the position of the first peak in the multiplet.
e. the peak multiplicity in a proton spectrum is (n+1), where n is the number of adjacent, equivalent hydrogens.

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

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave