6. One of the main functions of the semi-permeable cell membrane is to maintain homeostasis for the cell. Semi-permeable means that only some molecules are
allowed to cross the membrane and others are not.
What molecule enables large molecules to cross the membrane?
-carbohydrates
-proteins
-nuclear acids
-lipids

chromosomes carry the genetic information for organisms. also, chromatin is the thread like dna which is located in the nucleus of an organism.

i dont know it at allnow im just getting points at this pint

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

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