List the factors that influence a child’s development of a secure attachment. Pick two of them and explain how they impact development of secure attachment.
In: Biology
How does translation begin in a prokaryote? Eukaryote? How does the protein chain get made? How does termination occur?
In: Biology
1. Which of the following statements is attributable to Georges Cuvier?
Select one:
a. If an organ is used it strengthens and grows; if it isn’t used it weakens and shrinks
b. Slow subtle processes, acting over long periods of time, can have a dramatic effect
c. Fossils in older sedimentary rock strata bear less resemblance to modern organisms than those from recent strata
d. Geological processes operating today are the same as those that have operated in the past
2. In science, a theory is an idea that
Select one:
a. is a speculation supported by a rational argument.
b. has been extensively tested and supported by experiments and observations.
c. is also known as a hypothesis.
d. is consistent with general observations but hasn't been directly tested.
In: Biology
What is the chief source of the difference in the conversion of energy into useful work of the cell (efficiency) between a cell’s oxidation of glucose (~40%), compared to oxidation of glucose by combustion in air (0%)?
In: Biology
Briefly explain what, if any, aspects of Mayr's 5 theories of evolution are challenged by each of the following concepts: (a) Newman and Müller’s epigenetic mechanisms of character origination in which genetic evolution has more of a consolidating that innovating role, (b) genetic assimilation of an environmentally induced phenotype, (c) character variability as contrasted with character variation, (d) heterotopy, (e) heterochrony by neoteny, (f) homology thinking.
In: Biology
What is the Evolutionary Algorithm? (state it in one simple sentence). What are the three required components of any evolutionary system?
In: Biology
OK. So, this week we’re investigating the prokaryotic gene PPtrl, which codes for the Rbbl protein. You painstakingly derived a segment of the transcribed sequence of this gene, which is listed below.
a) What would be the mRNA sequence that corresponds with this segment?
|
coding |
5’ |
G |
C |
T |
T |
A |
G |
C |
T |
G |
G |
A |
C |
T |
3’ |
|
template |
3’ |
C |
G |
A |
A |
T |
C |
G |
A |
C |
C |
T |
G |
A |
5’ |
b) OK. So, knowing what you do about this particular PPtrl gene, describe how the process of transcription initiation would go for this gene.
In: Biology
What is the benefit of a binomial naming system? How does our understanding of the relationships among organisms in the natural world benefit from using the Linnaean system? Why do all mammals share similar skeletal structures? ( I will give 5 stars) and don't plagiarize
In: Biology
Explain why the enzyme carbonyl phosphate synthetase can be considered the most important enzyme in the to the urea cycle?
In: Biology
What is the difference between a shrimp and crab zoea?
In: Biology
Discuss several reasons why growing a microorganism in a pure culture is valuable and what you would not be able to learn from studying a microorganism in pure culture.
In: Biology
In Drosophila, the dwarp mutation leads to flies with small bodies and warped wings, the rumpled mutation causes bristles to be deranged, the pallid mutation makes wings pale, while raven leads to dark eyes and bodies. Females heterozygous for all 4 genes are crossed to males from a true-breeding dwarp rumpled pallid raven stock. The 1000 progeny obtained were as follows:
pallid 3
pallid, raven 428
pallid, raven, rumpled 48
pallid, rumpled 23
dwarp, raven 22
dwarp, raven, rumpled 2
dwarp, rumpled 427
dwarp 47
Indicate the best map for these four genes and calculate interference values where appropriate.
In: Biology
In: Biology
When XxYyZz is test-crossed, out of a total of 718 offspring, we obtain the following numbers: XYZ 280 xyZ 30 XYz 50 XyZ 3 xYz 5 xYZ 42 Xyz 38 xyz 270 Total= 718 A. Which gene is in the middle? (2 points) B. Calculate map distances. Show your work! (4 points) C. Calculate crossover interference. Show your work! (4 points)
In: Biology
In eukaryotic cells certain organelles, like chloroplasts & mitochondria, have two membranes (an outer and inner membrane) with the inner membrane containing highly involuted or folded structures. What advantages are provided by having two membranes such as those described above? Your answer should focus on form and function seen in these organelles.
In: Biology