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In plant communities today, leaf morphology is correlated with mean annual temperature, so paleobotanists use fossil leaf morphology to estimate the mean annual temperature of paleoclimates. However, the angiosperm fossil record contains an overabundance of samples fossilized near lakes or rivers where vines are especially common. Since vine leaves have a somewhat different association with temperature, use of data from vine-rich locations leads to mean average temperature estimates that are lower than actual recorded temperatures in modern plant communities. This potential bias in paleobotanical climate estimates is due to which type of bias in the fossil record?
Results of this analysis show that one of the most rapidly reassociating classes of DNA is substantially reduced in the older individual with respect to the 2 year-old. How can you describe this finding.
The bacteria are allowed to grow overnight and are streaked on a plate using a technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicillin..
Which type(s) of progeny will be produced when ovules from a green four o'clock plant are fertilized with pollen from a variegated plant.
Describe the Earth's nitrogen cycle with emphasis on those reactions performed exclusively by prokaryotic cell metabolisms.
I am conducting an activity assay to assess the Enzymatic Hydrolysis of 4-Nitrophenyl ?-D-Glucopyranoside by ?-D-Glucosidase. I am happy with the assay, though one of the components is bovine serum albumin ( 0.2% solution in phosphate buffer, to w..
Male frogs give calls that attract female frogs to approach and mate. Researchers examined mating calls of closely related tree frogs in South America. What outcomes be able to occur where the ranges of two species overlap.
In humans, red-gren color blindness is recessive and X-linked, while albinism is recessive and autosomal. What types of children can be manufactured as the result of marriages between two homozygous parents.
What was the situation of the ice when the temperature of the ice began to increase and What happened to the temperature between the time that the ice first started melting and the time that it was completely melted?
You are designing a new single-celled organism. Discuss the problems of size, getting molecules like nutrients and wastes in and out, temperature, energy and replication of genetic materials.
What is the rate of coagulation of naturally occurring colloids (under various pH and I scenarios)? How may the size spectrum of agglomerates change over time? How quickly do colloidal aggregates settle.
Calculate the separation between the lenses and the magnifying power of the microscope?
Consider on all the things you learned about sex & sexuality while increasing from sources such as family, school, friends, TV, movies, music, magazines, Internet, and boy/girlfriends.
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