The oldest known fossils are years old and resemble formations made by . Multiple choice question. 2.5 billion; cyanobacteria

The question is not complete as options are not complete , the remain part are;

A. 3.7 years, photosynthetic bacteria.

B. 3.7 years cyanobacteria.

The correct option is

3.7 billion years old, cyanobacteria and stromatolite.

Explanation:

This is because cyanobacteria is the oldest fossil to exist and they have been in existence for about 3. 7 billion years. These cyanobacteria photosynthesized because they have thread like chlorophyll filament, they produce food through the process of photosynthesis which is needed for their survival and they release oxygen as bye product.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

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