The ultimate source of energy (for most ecosystems) is the sun. The ultimate fate of energy in ecosystems is for it to be lost as heat. Energy and nutrients are passed from organism to organism through the food chain as one organism eats another. Decomposers remove the last energy from the remains of organisms.
The Contribution Limit. For 2013 and 2014. the basic limit for regular contributions to a Roth IRA is $5,500 for people under 50 years of age, and $6,500 for those who are 50 or older. (Numbers like this can be found in our Reference Room.) This limit may be reduced for any of the following reasons:
Yes, but combined contribution limits apply. For 2008 the maximum contribution amount is $5,000 for individuals under 50 years of age and $6,000 for those over 50. If you are â¦ under 50 and contribute $2,000 to your Roth IRA then you can only contribute $3,000 to your Traditional IRA.or 2008 the maximum contribution amount is $5,000 for individuals under 50 years of age and $6,000 for those over 50. If you are â¦ under 50 and contribute $2,000 to your Roth IRA then you can only contribute $3,000 to your Traditional IRA.