The answer has to be A., a duck.
Answer:
Some of the environmental effects that have been associated with meat production are pollution through fossil fuel usage, animal methane, effluent waste, and water and land consumption. ... Meat is considered one of the prime factors contributing to the current sixth mass extinction.(Heart disease.. etc)
Explanation:
<span>The Galapagos Islands are geographically isolated due to the Ocean that surrounds the islands themselves. The finches can't fly far enough to make it past the vast ocean to other mainland so they are stuck on the island and must adapt to what the island provides for food in varying areas.</span>
Answer:
The answer is number 3, rust deposits in the ancient ocean.
Explanation:
The question above is highly related to the "Great Oxidation Event" that occurred billions of years ago (or the ancient times).
This event led to an increase in the oxygen, both in the <em>atmosphere, terrestrial and in the oceans. </em>This was primarily because of the existence of <u>"cyanobacteria,"</u> the only oxygen photosynthetic bacteria. Due to this, the oxygen oxidized with the iron in the ocean (which was said to be abundant in those days). Thus, this led to the formation of iron oxides (rust deposits) on the floor of the ocean.
This explains the evidence that the oxygen levels in the sea increased due to photosynthetic bacteria.
Answer:
When first used in medicine in the 1940s, penicillin was uniformly effective in killing the bacterium Staphylococcus aureus. Today, the <u>Darwinian selection</u> has led to an increase in antibiotic-resistant alleles, and humans are increasingly at risk from untreatable Staphylococcus aureus infections.
Explanation:
Those bacterias which were affected by the penicillin were filtered off from the environment since the offspring of those susceptible bacterias were decrease by time until total extinction.
But by the natural mutation of bacterias, some bacterias can originate a offspring of bacterias which were capable of resist the action of an antibiotic. Those genes could also be carried out by a plasmid conjugation creating new colonies which are resistant to the penicillin.