Discuss how sexual selection pressures differ between males and females. What effect does this have on adaptations and other features observed between different sexes in plants and/or animals? Give several examples of how a sexual character can aid an animal in securing a mate thereby enhancing fitness. What factor(s) potentially place a restraint on this type of directional selection?

5. Which of the following objects, if touched to the surface of trypticase soy agar (TSA) within a Petri plate, would likely exhibit bacterial growth?

A. Your best friends nose

B. A strangers cell phone

C. A sterile swab

D. All of the above

E. A and B

  6. Which of the following is/are true of aseptic technique during streak plating?

A. It prevents airborne contaminants from entering the test tube culture you are working with.

B. It prevents airborne contaminants from entering the Petri plate.

C. It prevents cells from your culture from being left on the loop (to be touched by you or someone else the next time the loop is used).

D. All of the above

E. B and C

11. The primary function of the simple stain using methylene blue is to…

1. Distinguish between Gram-positive and Gram-negative wall and membrane(s) composition and organization.
2. Elucidate the shape of a bacterial capsule.
3. Elucidate the shape of the cell itself.
4. A and B
5. B and C

13. If safranin was replaced with methylene blue in the Gram stain, then Gram-negative E. coli would appear?

A. Bluish-Purple

B. Green

C. Pink

D. Red

E. Yellow

What is cystic fibrosis? Describe the major genetic cause and the mechanism that leads to the
symptoms of the disease.

The maximum yield of ATP per molecule of glucose in eukaryotic cells is 36 or 38 ATP, depending on cell type and conditions. Why is the calculated ATP yield referred to as "Maximal Theoretical Yield" in eukaryotic and in prokaryotic cells?

1. How would it affect organisms living in cold climates if oil or alcohol were their main body fluid?
2. How do you think the cohesive nature of water relates to its evaporation?
3. Describe in detail an experiment you could conduct to test whether another substance could replace water.

Describe how you would identify genes responsible for transcription in E. coli by isolating mutations in their genes. Remember that these genes are required for cell viability. Include all the steps in the isolation of the mutants and also describe how you will differentiate the mutants you want from those in other genes necessary for viability. This includes giving me the expected result for mutants in the genes you want.

The average sperm count in males is now lower than it was several decades ago. The reasons for lower sperm counts observed in males today is not known. Propose a hypothesis as to why, global, sperm counts are lower today than then were fifty years ago. What experiment could you do to test your hypothesis?

what is the function of HSPGs in the stem cell niche in your own words

You are studying a bacterium that grows in a particular ecological niche. You cannot culture it in the laboratory, but you can isolate small quantities of cells that microscopic analysis indicates are not contaminated with other bacteria. How will you obtain the ribosomal RNA gene sequence data to study the taxonomy of the bacterium? •How will you determine the complete genome sequence of the bacterium?

The steps performed for determining the complete genomics sequence of the bacterium include- Step 1: Cloning Step 2: Restriction Mapping Step 3: Gel Electrophoresis Step 4: DNA Sequence Analysis

Gel electrophoresis- The DNA fragments after Restriction digestion are separated by electrophoresis, a process that involves application of an electric field to cause the DNA fragments to migrate into an agarose gel. The gel is then stained with a methylene blue stain to visualize the DNA bands and may be photographed. Although methylene blue dye is not as sensitive as ethidium bromide it may be used to stain the higher quantities of DNA that are used in this experiment. The movement of the fragments will always be towards the positive electrode because DNA is a negatively charged molecule. The fragments move through the gel at a rate that is determined by their size and shape, with the smallest moving the fastest.

DNA Sequence Analysis- This method uses dideoxynucleotide triphosphates(ddNTPs) whichwhich an H on the 3’ carbon of the ribose sugar instead of the normal OH found in deoxynucleotide triphosphates (dNTPs). Dideoxynucleotides are chain terminators. In a synthesis reaction, if a dideoxynucleotide is added instead of the normal deoxynucleotide, the synthesis stops at that point because the 3’OH necessary for thetaddition of the next nucleotide is absent. The sequencing gel is able to resolve fragments that differ in size from each other by only one base.

**I need explain exactly gel ectrphoresis and DNA sequence analysis will help find the bacteria genome

Explain in detail type I and III hypersensitivity

what is one way the Corona virus pandemic will end?  Explain using these topics: what is a virus, vaccination, social distancing, SIR model of how diseases spread, mutation

If DNA from an evidence sample and DNA from a suspect or victim share a profile that has a low frequency in the population, this suggests that the two DNA samples came from the same person; the lower the frequency, the stronger the evidence. But the possibility remains that the match is only apparent—that an error has occurred and the true profile of one of the sources differs from that reported by the laboratory. Please discuss the ways that laboratory errors, particularly errors that might falsely incriminate a suspect, can arise, how their occurrence might be minimized, and how to take into account the fact that the error rate can never be reduced to zero.

Please discuss the quality assurance and control.

Explain/Breakdown the Chemotaxis response mechanism and their role in flagella movement and regulation. Bacterial Motility(Motor) Kit Please provide an in depth answer in its simplest form for easy understanding. Thank you