All animals and plants are made of cells. Animal cells and plant cells have features in common, such as a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes. Plant cells also have a cell wall, and often have chloroplasts and a permanent vacuole.
Asker's rating. Report Abuse. You can stay outside for up to 2 years with a re-entry permit ...but you must keep a presence here ..home, bank account ..etc but for stays of over 6 months its best to get one a green card is for living here ...if you are not doing that you eill lose it. David Â· 6 years ago. Thumbs up. 2.
Green Card Travel Rules for Prospective Citizens. If you are an LPR who wants to become a naturalized citizen, any travel outside of the U.S. may be limited by continuous residency requirements. Generally, you must have been physically present in the U.S. for at least 30 months out of the previous five years to establish continuous residency. If you fail to meet this threshold, you may still be eligible for naturalization if you can prove that the absence was not an abandonment of resident status.