QUE S T b)
1
A supermarket chain advertises that its plastic carrier-
bags are 'environmentally friendly'. These bags are
made from polythene and contain added starch. A
student decided to find out if the claim is true. In the
investigation the student buried a piece of plastic from
the bag in a pot of soil and left it for one month. When
the plastic was dug up there were many small holes in
it.
The drawings show the plastic, as seen through a
microscope,
before and after being buried.
Starch
Hole
3
Plastic buried for 1 month
Plastic before being
buried
a) Explain, as fully as you can, the process that caused
the holes to appear in the plastic.​

The holes were formed from either.., bugs could have ate the starch and the polyethylene was not a deterrent?

It may be biodegradable because it is edible to bugs? I'm not  sure that makes it completely biodegradable though.

https://www.livescience.com/58810-caterpillar-biodegrades-plastic-bags.html

copy and paste this link. Explains alot?

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.