Answers

2015-12-28T20:39:13+05:30
mass remains same as it is amount of matter present in a substance
and weight decreases as the altitude increases
0
2015-12-28T23:20:02+05:30
most of the seeds have a protective layer called seed coat which makes the seed more protective and due to this they can not digest it and pass it through their feaces and if seed gets suitable conditions, they develop into a new plant.

if you think it is good then click on thanks and the brainliest.
0