A student crosses a pure breeding line of red-flowered poinsettias with a pure breeding line of white flowered poinsettias. The student observes that all the plants in the F, generation have pink flowers. The student then crosses the F, plants with one another and records observations about the plants in the F, generation. The student will use the F data to perform a chi-square goodness-
of-fit test for a model of incomplete dominance. The setup for the student's chi-square goodness of fit test is presented in Table 1
Table 1. A chi-square goodness-of-fit test for Incomplete dominance
Phenotype
Expected
Red flowers
Pink flowers
White flowers
Observed
64
56
107
112
53
56
The critical value for a chisquare test with a significance level of p = 0.05 and 2 degrees of freedom is 5.99. Which of the following statements best completes the student's chi-square goodness-of-
fittest?
A The calculated chi-square value is 1.53, and the null hypothesis cannot be rejected.
The calculated chi-square value is 1.53, and the null hypothesis can be rejected.
The calculated ch square value is 98, and the null hypothesis cannot be rejected.
The calculated chi-square value is 98, and the null hypothesis can be rejected.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

answer; both surfaces of the membrane are nonpermeable