Biology Answers

Differentiate between monozygotic and dizygotic twins. What is the use of twin studied? State Hellin's Law and discuss it's applications in twin studied.

Give a graphical presentation of absorption spectral data indicating lambda max. and E value in it. Illustrated your answer.

using punnet square, summarize the expected results, both genotypically and phenotypically, of the following crosses. R-round r-wrinkled.
a) RR x rr
b) Rr x Rr
c) Rr x rr

Relative concentration of auxin in different parts of a seedling.

The scientist wanted to determine if two newly discovered populations of insects exchanged information with other members of the same population about the location of a food source decided to set up a systematic observation in which food was placed for the insects to find over a period of time the scientist recorded how many insects were found at the food sauce the scientist collected the following data

Population 1 was found to be less than 5 insects at food source and Population 2 had almost 19 insects at food source at the same time frame

Which of the following is the best conclusion that can be made regarding the data?
A. More population to organisms can be found the ecosystem than population one organism
B. Populations 1 and 2 are the same species but have different niches
C. Population 2 has an evolutionary advantage of a population 1
D. Unlike population 1 population 2 communicates with members of a species

What substances in dead animals can only be decomposed by bacteria?

A complex system of cell cycle regulation has evolved in ____________ cells with both internal and external signals.
The ____________ signals ensure the stages follow one another in their normal sequence. They also make certain that each stage is properly completed before the next stage begins.
Research has identified proteins called ____________ , which fluctuate in number as the cell cycle continues, helping to regulate the timing of events.
The correct amount of these ____________ must be present in order for the cell cycle to proceed between the checkpoint stages of G₁, ____________ , and the M stage.
The ____________ signals tell the cell whether or not to divide. Much of the time mammalian cells enter the cell cycle only when stimulated by an ____________ factor.
Hormones called ____________ are one example of an external factor; these hormones deliver a signal to the plasma membrane of target cells.

one type of pet mouse occurs in either grey or white coats. A client would like to produce a purebreeding strain of grey coloured mice. he has tried mating grey mice only with other grey mice, but in many cases the litters include some white mice.
explain the theory and the steps that your client must take to determine which of his grey mice will breed true

Come up with at least two possible alternative explanations for the “amazing” redistribution of the
ETPUM on the Lycra-sealed slide. Both of your explanations should consider how the microbes
“sensed” the presence of polyurethane. One of your answers should not involve flagella.

Briefly explain why water (H 2O) is an excellent solvent for NaCl. That is, why does NaCl dissolve in water?