Answer:
The only living characteristic of viruses are that they reproduce but only inside the host body, using its machinery they can mutate and change over time. In the case of retroviruses, DNA can be passed to succeeding generations.
the non living characteristics of viruses include that they are not cells; they lack plasma membrane, cytoplasm and cellular organelles and they can not undergo metabolism. they can not maintain homeostasis as they crystallize out of the host body. they can not grow, just multiply using the host machinery.
considering some facts that viruses can reproduce inside hosts body, and that they can mutate we can say that they are living.
but flipping the coin, viruses are not cells, they lack cytoplasm and organelles and they crystallize out of the host body. We can say that they are non-living.
but up till now biologists place viruses on a border line of living and non living.
Explanation:
Crossing over in biology, Chromosomal crossover occurs when homologous chromosomes exchange genetic material. ... The result in recombinant chromosomes. It particularly occurs in the pachytene stage of prophase I of the first meiotic division.
Hope that helped! Have a great day.
-astroworld301
The answer is <span>Chemical digestion involves the breaking down of food with enzymes; </span><span>mechanical digestion is breaking down food by chewing and tearing with teeth.
Mechanical digestion means breaking down food mechanically. By chewing and tearing with teeth, food breaks down into smaller parts and no enzymes are used. Chemical digestion means breaking down food in a chemical manner. This is achieved by secreting enzymes, which break down chemical bond between food molecules.</span>