Ascientist wants to determine the best light wavelength for growing plants. he grows plants in four test groups as shown in the table below. what, if anything, was wrong with the experiment?
a. he should only grow one plant in each group.
b. he should only change the wavelength of light for each group.
c. he should add a control group with a co2 level of zero ppm and a light intensity of zero percent.
d. there is nothing wrong with the experiment.

B He should only change the wavelength of light for each group

Explanation: I just took the test and got it right

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.