I. the theory was developed from the observations and work of one scientist. ii. the improvement of magnification technology made the development of this theory possible. iii. the theory was developed before the invention of the first microscope. iv. various scientific laws made from the observations and opinions of several scientists in the development of this theory. which of the statements above are true statements about the development of the cell theory? i and ii i and iii ii and iv iii and iv

Need the answers if its a multiple choice question

Centriole.centrioles are present in animal cells but are usually absent in plant cells.

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.