Answer:
Which part of the electromagnetic spectrum is necessary for the sense of sight in humans?
visible light
These cells line focal pits of the CNS and, in specific spots, deliver CSF. The cilia of these cells help flow the CSF that sustains and pads the mind and spinal string. Expansions from these cells wrap vessels and give additional control over which materials enter or leave the intercellular liquid of the CNS.
Answer:
organelles , Plasma membrane, cytoplasm, ribosomes
Explanation:
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No, that is certainly false. <span />
Answer:
It is "The opening of flask is pointed in an unsafe direction"
Explanation:
The students were there in the lab to perform practical without obeying the safety rules. The most reasonable basis for teacher's warning here, in this case, is the flask which is pointed in an unsafe direction. It is not specified whether the flask is containing any chemical or not but even if it is empty, it might just fall and break and create injury to anyone present in the lab because, the students are also not wearing proper laboratory wear in accordance to the safety rules which include lab coats, gloves, eyewear, etc. Also, some Students have not tied their hair and more importantly the flasks carrying liquids are not labeled. All of these things might end up in a critical situation for which the teacher warned students about it all.