There is external and internal so I'll list th external. The most important is skin then mucus, sweat or secretion, hair, nails and tears which are all part of the integumentary. Some internal defenses are white blood cells and T cells.
Answer:
<em>Backyard bird feeding is a well known </em><em>type of human–untamed life </em><em>communication in specific regions of the northern and southern side of the equator.</em>
Explanation:
In territories where sustaining is mainstream in the Southern Hemisphere, supplemental encouraging may excessively profit acquainted winged creature species while driving with decreases of local species, possibly due to hetero specific competition.
However, Backyard bird feeders can bring about constructive outcomes on some feathered creature species, for example, improved overwinter endurance, expanded populace sizes and geographic range extension.
Sister chromatids are two identical copies of Chromosome that is formed by the replication of a single chromosome.
This copies are formed during mitosis. Later on, these two sisters chromatids will grown into two different Cells
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B. That is not related to the Structural adaptation. And are in you in K12?
Adaptations shouldn’t end up causing difficulties for the animal so that eliminates options A and D. Option B can be eliminated because a long beak more than likely wouldn’t help a bird hide from predators, if anything it could make it stand out more. So, the answer is C
