Plant cells have cell walls and animal cells do not because the plant cell needs it for its activities.
A because people can't see the seeds.
Answer:
In artificial selection, humans have the capacity to influence certain characteristics of organisms by selective breeding. One can choose desired parental traits determined by genes, which are then passed on to offspring.
Dog breeding is another prime example of artificial selection. Although all dogs are descendants of the wolf, the use of artificial selection has allowed humans to drastically alter the appearance of dogs.
Explanation:
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Oxygen will diffuse from an area of higher concentration (outside the cell) to an area of lower concentration (inside the cell). </span>
D. Cross braces this is the right answer
