Answer: 
Abiotic factors are the non-living factors that support the life on earth. The make up the environment suitable for the survival and growth of the living species like soil, water, sunlight and others. Biotic factors are the living species like plants, animals, microbes and humans. 
A cow is a herbivores animals, that utilizes grasses,shrubs and leaves as food, it also need water to drink and oxygen to breath and respire. Therefore, the two example of abiotic factors which a cow will experience in it's environment is oxygen and water and biotic factors will be grasses and another member of the same species as mate, to undergo copulation and produce a new offspring. 
 
        
             
        
        
        
Answer:The excretory system is the system of an organism's body that performs the function of excretion, the bodily process of discharging wastes. The Excretory system is responsible for the elimination of wastes produced by homeostasis.
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Answer:
Eukaryotic cells are generally bigger — up to 10 times bigger, on average, than prokaryotes. Their cells also hold much more DNA than prokaryotic cells do.
Explanation:
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<span>Hooke had been viewing the cell walls in cork tissue.</span>
        
             
        
        
        
Now it is clear that genes are what carry our traits through generations and that genes are made of deoxyribonucleic acid (DNA). But genes themselves don't do the actual work. Rather, they serve as instruction books for making functional molecules such as ribonucleic acid (RNA) and proteins, which perform the chemical reactions in our bodies.Proteins do many other things, too. They provide the body's main building materials, forming the cell's architecture and structural components. But one thing proteins can't do is make copies of themselves. When a cell needs more proteins, it uses the manufacturing instructions coded in DNA.The DNA code of a gene—the sequence of its individual DNA building blocks, labeled A (adenine), T (thymine), C (cytosine) and G (guanine) and collectively called nucleotides— spells out the exact order of a protein's building blocks, amino acids.
Occasionally, there is a kind of typographical error in a gene's DNA sequence. This mistake— which can be a change, gap or duplication—is called a mutation.