A group of 500 people are selected at age 20 and followed for 15 years. The people who go on to develop a certain type of cancer are compared with those who do not. The researchers are attempting to determine different
factors that could increase cancer risk.
historical cohort study
double-blind drug trial
prospective cohort study
randomized controlled trial

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

the answer is a) cell division.

hope this !

loss of sensation to pressure and touch

the dorsal column–medial lemniscus pathway (dcml) (also known as the posterior column-medial lemniscus pathway (pcml)) is a sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (position) from the skin and joints.