Mostly because the 'Kingdom Protista ' is defined by what they are NOT. (e.g. not plants, fungi, or animals). Most are single-celled, some are colonial, and some multicellular. Some are photoautotrophic, some ingestive heterotrophs, and some capable of both modes of nutrition. In other words, there is a lot of diversity between 'protists' - some are closer to animals, and some are closer to plants. Research in molecular biology has helped clear up some of the confusion, but protist classification is an ongoing process.
answer:
By altering the light factor
Explaination:
Blood levels of the pineal hormone melatonin are high at night and low during the day. Its secretion is controlled by a rhythm-generating system located in the suprachiasmatic nucleus of the hypothalamus, which is in turn directed by light. So by designing a control in which the intensity or duration of light is altered to regulate this cycle.
the answer is Ocell because a cell is the building block of all things
False, it is the hypothalamus
The energy is stored in the ATP and NADPH molecules