Answer: f. only b. and c. are examples of homozygotes
Explanation:
Diploid cells (all non-reproductive cells) have two copies of each gene, called <em>alleles</em>, one obtained from the father and one from the mother. In genetics, an organism is a homozygote for a gene if both alleles are the same. In contrast, heterozygotes have different alleles for the same gen.
Genes are represented with a letter, and you can differentiate between <em>alleles </em>if the letter is uppercase or lowercase.
For example, if you wanted to represent the gene that encodes a flower color, you could call A the 'red' version of it and a the 'blue' version of it. A plant would be homozygote for that gen if it had the same version for both alleles, AA or aa.
The correct answer is C, oxygen. Oxygen was once harmful and used to cause harm to the DNA in primitive organisms.
Later on, the bacteria developed enzymes that prevented their DNA from damaging action of oxygen. Afterward, they evolved to use it for cellular respiration.
Earth's<span> magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. Loops of currents in the constantly moving, liquid iron create magnetic fields. From afar, the </span>Earth<span> looks </span>like<span> a big </span>magnet<span> with a north and south pole </span>like<span> any other</span>magnet<span>.</span>
Answer:
C Or B
Hope this helps