Answer:
Option (d).
Explanation:
Mutation may be defined as the sudden, heritable change in the nucleotide sequence of the organism. Mutation may occur due to the errors in DNA replication or may occurs due to the mutagens.
Joshua and Lederberg experiment explains that mutation is the non adaptive and random process that occur in the organism. He used the replica plating of E.coli and grows them on streptomycin drug. The bacteria was grown on the the primary plate and they are transferred to the secondary plate with streptomycin drug in the growth environment. The resistant strain of bacteria grows in the streptomycin environment.The pattern of bacteria growth on the plate explained that mutation occurs randomly and it is a non adaptive process.
Thus, the correct answer is option (d).
Hello there.
<span>The crossing over is a process where the chromatids pair and exchange sections of DNA, which lead to exchange genes (this result is call genetic recombination). So, the crossing over between nonsister chromatids during meiosis is significant in heredity because it leads to an increase of genetic variation (answer d.)</span>
The
true statements are:
<span><span>·
</span>the neuron cell bodies are located in the
lateral horns of their spinal cord segments.</span>
<span><span>·
</span>the sympathetic trunk ganglia house
sympathetic ganglionic neuron cell bodies.
</span>
<span><span>·
</span><span>the splanchnic nerves are composed of
preganglionic sympathetic axons that did not synapse in a sympathetic trunk
ganglion</span></span>
Producers can make their own food by capturing the sun's energy, but consumers don't. Consumers need to eat other organisms to obtain energy.
