Answer:
D.
Explanation:
D. constructing passageways next to dams to allow salmon to swim around blocked rivers
This program is already being used in many dammed rivers in the northwest and is showing success.
Answer: The carbon dioxide is the output and oxygen is the input of the Scuba apparatus.
Explanation:
The scuba apparatus is a life saving apparatus used by the sea divers. It recycles the exhaled gas and removes the carbon dioxide and compensates for the utilized oxygen gas before the diver is actually supplied with the gas for the purpose of breathing in a circuit. Hence, the carbon dioxide gas is the output and the oxygen is the input.
An available niche after extinction can lead to speciation because it allows the emergence of genetic variation in other competing species.
<h3>What is speciation?</h3>
Speciation is a slow process associated with the emergence of reproductive isolation barriers in a population.
These barriers lead to the absence of gene flow and eventually to the emergence of new species.
In conclusion, an available niche can lead to speciation in other competing species.
Learn more about speciation here:
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Answer:
Fossils
Explanation:
Fossils are the imprints or remains of organisms which were alive millions of years ago. The fossil record provides evidence for evolution . Charles Darwin's theory states that all organisms alive today evolved from more simple life forms. Two fossils named Ardi and Lucy provide evidence for human evolution.