Answer:
defines a species as any group of actually or potentially interbreeding species that produce viable offspring.
Explanation:
<em>Biological species refers to a group of genetically and physically compatible organisms. These organisms are capable of mating or interbreeding and the offspring that result from this mating, as a rule of thumb, must be valid or fertile.</em>
Hence, species do not only share similar genetic materials (in form of DNA), they must also be physically compatible to mate and the resulting offspring from the mating must be fertile.
Answer:
When an E.coli cell is infected by multiple phages,they will take either lytic or lysogenic pathway.
Explanation:
When lambda phage bacteriophage infects an E.coli,it can either undergo lytic cell growth and lyse the host cell or enter lysogenic pathway.
The operator region of lac operon in E.coli contain single repressor binding site whereas the lambda operators 
and 
each contains 3 repressor binding sites (
and 
) that are differently occupied under different conditions.
The differential affinity of lambda repressor for the three binding sites in these operators play an important role in the maintenance of lysogenic state of lambda prophage in E.coli.
The lytic development occurs in cells infected with lambda phage that carry 
gene.
In contrast,lysogeny will occur in bacteria that infected with lambda phage that harbor a deletion of Cro gene.
The answer is: <span>larger horses have longer legs.
</span>The ancestors of horses lived in the forest, where they could hide from the predators. But, with the first steppes, they could be spotted by the predators. Horses had to adapt in order to survive. Thus, their legs became longer through time so horses could run faster to escape predators.<span>
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