Biology Answers

Four o'clocks exhibit incomplete dominance. Thus, if a plant with red flowers is crossed with a plant with white flowers, the offspring will all produce pink flowers. What offspring would you expect if you crossed a red-flowered plant with a pink-flowered plant?

Describe the effects of decreasing the concentration of magnesium salt on the

growth of S. polyrhiza.

I have a question related to the refuge effect in ecological models. The assumption is that the population of hosts/prey is divided into two groups. One group consists of individuals that are safe from parasitoids/predators and another group consists of individuals that are exposed to parasitoids/predators and can get parasitized. Does it affect the growth rate in the sense that hosts that are in refuge have a bigger growth rate than those that are not in refuge? Are there some known experimental results, some papers or books that deal with this topic?

Why carbon is said to be the backbone of bio molecules

A genetics research group has determined the sequence of a rat gene thought to be

involved in controlling the fertilising ability of rat sperm. They believe a similar gene may

control fertility in humans. Describe how what is known about the rat gene can be applied

in PCR to clone the complementary human gene. You should explain the experimental

approach taken and how it could confirm that the human gene in question does indeed

correspond to the rat gene.

A female in her sixties (Mrs J) makes an appointment with her GP because she has been suffering with pains in her legs and having difficulty walking. She is also having problems with her vision. She presents as overweight, bordering on obese. When questioned about her appetite she mentions that she seems to feel thirsty a lot of the time. The GP takes a blood sample and asks the patient to provide an MSU urine specimen. After using a dipstick on both samples, the GP arranges for the patient to attend the clinic for a glucose tolerance test. The results are in Table 1 below.

Table 1: Plasma glucose concentrations (mmol/L) determined for Mrs J

minutes after glucose load

0

30

60

90

120

Patient T

8.5

16.1

16.8

15.9

15.5

1> Using the data for J in Table 1 construct a correctly labelled graph using appropriate software to show the profile and paste it into yourwork.

3> Briefly describe the clinical biochemistry test that would be used to monitor the patient during treatment. 

1> Discuss how the outcome of the test relates to the symptoms described by Mrs K

2> Briefly describe the clinical biochemistry test(s) that would be used to monitor the patient during treatment. 

3> Using the data for Mrs K in Table 1 construct a correctly labelled graph using appropriate software to show the profile and paste it into your work. (Remember that the title, also called the figure legend, should be below the graph.) 

Using an example (blood glucose), outline the process of hormonal control ?

If eight acetyl - Coa are produced from a fatty acyl -CoA in B- oxidation, what is the equivalent number of ATP Molecules synthesized solely from them

Sickle cell anemia (S-anemia) is inherited as autosome incomplete dominant character. Homozygotes for dominant character die before puberty, the heterozygotes have subclinic anemia. The plasmodium can not use the S-hemoglobin and human with S-anemia has no malaria. What is the probability of the birth of children not stable to malaria, in a family, in which both parents are stable to malaria