Axon growth. 1-2 sentences per molecule, short paragraph/annotated diagram for experiment. Briefly explain the role of the following molecules in neural development.

- netrins

- nerve growth factor

- semaphorins

For ONE of these molecules, explain an experiment that shows its importance in development.

A classic experiment involving a phototrophic organism demonstrates how rapidly microbial evolution can occur within a population of cells. What attributes of the metabolism of this model organism were important for the study and what did the experiment show?

can u tell me plzz

Explain the reasoning behind Harlow’s decision to conduct his famous experiment on monkeys. Explain the experimental setup, the findings, and his conclusions. In your opinion was his experiment worth the “cost”, in terms of the cost to the monkeys’ wellbeing as compared to the knowledge we gained from this research.

: Let X denote the result of a random experiment with the following cumulative distribution function (cdf): 0, x <1.5 | 1/ 6 , 1.5<=x < 2 | 1/ 2, 2 <= x <5 | 1 ,x >= 5

Calculate ?(1 ? ≤ 6) and ?(2 ≤ ? < 4.5)

b. Find the probability mass function (pmf) of ?

d. If it is known that the result of the experiment is integer, what is the probability that the result is 2? e. If it is given that the result of this experiment is an integer and a fair coin is tossed the number of times that the die shows, find the probability of obtaining exactly one head.

Thank you

2. A Charles’ Law apparatus contains a fixed volume of gas and measures its temperature and pressure. The ambient pressure during the experiment is 758 mmHg.

A) The sample’s initial pressure is measure to be 327 mmHg and its temperature is 12.6 °C; what is the new pressure reading when the temperature is increased to 57.2 °C?

B) If the Charles’ Law apparatus is rated to handle pressure reading up to 1000 mmHg, is it safe to conduct the experiment as described in Part A?

YES or NO

If Yes, to what temperature can the experiment be safely carried out?

If No, at what temperature might the apparatus fail?

You are investigating two sensors to use in an experiment. Sensor A has area 600 ± 0.3 mm2 and the gap thickness is 0.3 ± 0.01 mm. Sensor B has area 400 ± 0.25 mm2 and the gap thickness is 0.2 ± 0.02 mm. Estimate the relative (hint: this is a %) and absolute uncertainties (hint: this has units of capacitance) in capacitance for both sensors. Your experiment requires that the capacitance is measured accurately within 5%. Which would you select for your experiment? Justify your response.

C = 8.85 × 10^?15 F/mm A/t

Let (Ω, F , P) be a probability space. Suppose that Ω is the collection of all possible outcomes of a single iteration of a certain experiment. Also suppose that, for each C ∈ F, the probability that the outcome of this experiment is contained in C is P(C).
Consider events A, B ∈ F with P(A) + P(B) > 0. Suppose that the experiment is iterated indefinitely, with each iteration identical and independent of all the other iterations, until it results in an outcome that is an element of A ∪ B, after which it stops. What is the probability that this procedure results in an outcome that is an element of A? Do not use conditional probability to answer this question.

Using R-studio

2. Consider an experiment where we flip a fair coin six times in a row, and i is the number of heads tossed:

            a.         Calculate the probability mass function for i = 0. . . 6 using the equation from Ross section 2.8 for Binomial Random Variables

            b.         Conduct a simulation of this experiment in R, with T trials of the experiment – pick several values of T from 10 to 10,000.

            c.         Create a plot of the theoretical result vs. your simulation at T = 100 and T = 10,000. Show that they converge as T increases.

possibility tree

One box contains two black balls (labeled B1 and B2) and one white ball. A second box contains one black ball and two white balls (labeled W1 and W2). Suppose the following experiment is performed: One of the two boxes is chosen at random. Next a ball is randomly chosen from the box. Then a second ball is chosen at random from the same box without replacing the first ball.

a. Construct the possibility tree showing all possible outcomes of this experiment.

b. What is the total number of outcomes of this experiment?

Say you design a PCR experiment with normal temperature settings and reagent amounts (primers, dNTPs, polymerase) for 20 cycles. You want to adjust your experiment so that it will increase the amount of DNA produced. Which of the following adjustments to the experiment will increase the amount of DNA amplified during PCR?

Group of answer choices

You increase the length of the primers.

You increase the temperatures in all of the steps.

None of these adjustments will increase the amount of DNA produced through PCR.

You run 5 extra cycles.

You double the amount of dNTPs.