Answer:
Option D, The DDT killed susceptible flies. The few that were already naturally resistant survived and passed this resistance on to their offspring.
Explanation:
When DDT was sprayed for the first time, some of the house flies which were not capable enough to withstand the adverse effects of DDT , eventually died. And the butterflies that survived through this, were having a natural resistance against DDT. Now, with time these DDT resistant houseflies mated and produced offspring that had genetic trait of resisting DDT by birth. This is the reason, why houseflies after ten years were as abundant as ten years back when the control program was started.
Option D is correct
<span>Sucrose is a disaccharide. It has the chemical formula C12H22O11. Its structure is composed of one glucose and one fructose joined at the glucosyl C1 to the fructosyl C2 by an ether bridge.
Erlose is a trisaccharide, composed of two glucosyls and one fructosyl subunit. Erlose can be formed from sucrose and glucose by joining the glucose C1 to the C4 of the glucosyl subunit of glucose by an ether bridge.</span>
Gymnosperms were the first plants to reproduce using NAKED SEEDS. ("Naked Seeds" include : <span>conifers, cycads, ginkgo)</span>
Answer:
An incomplete dominance bad heterozygous individual blends the two traits.
With codominance you'll see both alleles showing their effects but not blending whereas with incomplete dominance you see both alleles effect but they've been blended
It's quite difficult to give you the ansver without any diagram attached. But I think I can help you. I suppose the first, the second and the third atom all are <span>carbon, Then fourth should be sulphur and the last one - nidrogen
The actual look of this task should be like that : </span><span>atom 1,2,3,4-sp2
atom 5-sp3. I hope it will help you in some measure, but next time check it carefully.</span>
