True! because if you have more than one variable, you aren’t going to know which variable changed the dependent variable.
Answer:
Plants have cell walls, mammals have cell membranes.
Answer:
IgM, IgA, IgE, IgD and IgG
Explanation:
IgM functions in the initial response to offence.
IgA is important for protection of mucus membranes such as in saliva, sweat, tears and gastric fluid.
IgE is active during allergic reactions and defense against infections.
IgD is found on the surface of lymphocytes and is activated upon contact with antigens.
IgG forms part of the secondary response to antigen and is also responsible for newborn protection.
Its a plant cell so its similar to an animal cell so its a eukaryotic
Answer:
I think it explains that the DNA molecules are double helix with alenine and thymine paired together
