Answer: A.Reproductive isolation occurred through behavioral isolation.
Speciation is a process of development of new species from the previously existing species due to reproductive barriers occur among the members of the population of species. The reproductive barrier arises due to behavior and physical differences. Behavior isolation occurs when the two populations of the same species develop some differences in behavior, to attract their mates for mating, which can lead to reproductive isolation among members of same species or related species.
In the given situation, the related species of leopard frogs have developed specific courtship call, this will lead to reproductive isolation due to behavior isolation. This will help in identifying mates of the same species and this will act as a reproductive barrier among the other related species.
How many tRNA from an anti codon that will attach to the mRNA codon?
3 would attatch to the mRNA
Answer: beef from a cow
Explanation: A cow has a lot of fat
Answers: examples of host defence mechanism include: Innate anatomical and physiological barriers, Innate cellular and chemical defenses.
Explanation:
The capability of the human body to resist almost all types of organisms or toxins that tend to damage the tissues and organs is known as IMMUNITY. This host defence mechanism can be classified into INNATE or adaptive immunity.
The immunity that results from general processes, rather than from processes directed at specific disease organisms is called the INNATE IMMUNITY. The anatomical and physiological barriers of the innate immunity provides the first line of defence against pathogens. Examples of these barriers of the innate immunity includes:
--> Destruction of swallowed organisms by the low stomach pH and digestive enzymes
--> The vigorous mucociliary clearance mechanisms of the respiratory airways and lungs.
--> Resistance of the skin to invasion by organisms
While examples of innate cellular and chemical defenses include:
--> Phagocytosis of bacteria and other invaders by white blood cells and cells of the tissue macrophage System
--> lysozymes, a mucolytic polysaccharide that attacks bacteria and cause them to dissolute.
--> basic polypeptides which react and inactivate certain types of gram- positive bacteria
-->natural killer lymphocytes that can recognize and destroy foreign and tumor cells.
<span>Although waves in the ocean are typically caused by wind, that is not the case with tsunami. The disturbing force that produces conditions for a tsunami is typically from an earthquake.</span>
