Biology 1 EOCEP Passage Practice

Trees ​ (a)   the amount of carbon dioxide in the atmosphere through ​ (b)   . Trees ​ (c)   carbon levels in the geosphere through decomposition. Trees ​ (d)   carbon dioxide levels in the atmosphere and hydrosphere through the process of respiration.

• decrease
• Increased
• photosynthesis
• Respiration
• rose
• decreased
• increased
• declined

A sample of eDNA from the ancient ecosystem contained genetic material originating from an

ancient poplar tree. Scientists identified the corresponding chromosome of modern poplar trees

and compared the ancient and modern DNA molecules. The DNA was not identical.

Which statement most likely explains why the DNA from modern poplar trees is different from the

DNA of ancient poplar trees?

• Ancient poplar trees reproduced asexually by producing seeds, but modern poplar trees

  reproduce sexually.

• Favorable environmental conditions reduced the rate of cellular division, resulting in the

  production of fewer daughter cells.

• Mutations made during DNA replication were not corrected before protein synthesis began,

  causing mutations to accumulate in the poplar genome over time.

• Independent assortment of chromosomes during meiosis enabled ancient poplar trees to

  produce identical offspring, but modern poplar trees produce genetically unique offspring.

True or False: The eDNA found in Greenland has provided information on only one organism.

• eDNA is not found in Greenland
• True
• False

Fill in the blank: The eDNA found in Greenland is not directly linked to a ______ source of biological material.

(a)  

• single
• random
• unknown
• general

The eDNA evidence suggests there were not enough food sources to support a mastodon population.

• There was an abundance of food sources for mastodons.
• Mastodon populations thrived due to plentiful resources.
• Food sources were sufficient to sustain a large mastodon population.
• There were not enough food sources to support a mastodon population.

Fill in the blank: The ecosystem temperature in ancient Greenland was _​ (a)   degrees Celsius warmer than today’s temperature.

• 11°C to 19°C
• 5°C to 10°C
• 20°C to 25°C
• 0°C to 4°C