Plants make food in their leaves<span>. The </span>leaves<span> contain chlorophyll. </span>Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. (photosynthesis
Does that answer the question?
Species could compete for water, food, land, etc.
Answer:
Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
