Answer:
As above discussed an ecosystem is the diversity of many communities of organisms where they interact with living (biotic) as well as nonliving (abiotic) thing whereas community contains the variety of populations of different species linking with each other in a region.
Explanation:
Answer:
Increase in the chances of individual animals contracting Mtb.
Explanation:
When population density is high, contraction of sickness is more frequent. Crowding may cause the exposure and the mixing that needs to happen in order for transmission of Mtb to occur. Chances of contracting Mtb would be much higher in crowded and poorly ventilated condition.
Answer: 1-4-5-6
Explanation: Polymerase Chain Reaction or PCR is a lab technique used to make numerous copies of determined section of a DNA. The process requires 5 ingredients to perform:
1) The DNA template to be copied, which can be obtained by disrupting the nuclear membrane of a cell and releasing its components into a solution;
2) Short sequences of DNA, called primers, designed to be complementary to the DNA to be copied;
3) DNA nucleotide bases, also known as dNTPs (A, T, C and G);
4) Taq polymerase enzyme;
5) Buffer to ensure optimal conditions to the reaction;
PCR involves three stages:
- Denaturing: this stage takes 15 to 30 seconds and consists of putting the DNA and the other ingredients in a thermal cycler, heated to 94-95°C. In that temperature, the DNA to break into two strands, in a process called Denaturation;
- Annealing: the temperature is reduced to 50-65°C, so the primers can attached itself to a specific location on the stranded DNA. This step initiates the synthesis, because the polymerase enzyme can only add bases to a double strand of DNA. Once bounded, it takes 10 to 30 seconds to make a new complimentary strand of DNA from the model;
- Extending: In this stage, the temperature is increased to 72°C, which enables the Taq polymerase enzyme. This enzyme comes from a bacteria, which supports high temperatures, and has a role of builiding the complimentary strand by binding the primer and adding the DNA bases to the single strand. This creates a new molecule of DNA. The time this step takes depends on the length of the DNA to be copied;
The answer they want is "Telophase" without quotes
The combination is the one we see is physical and the author one that we can’t see is unphysical