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A male and female giraffe live on a small island in the Indian Ocean. One giraffe has a long neck and one has a short neck. On the island grow many tall trees and many short trees. The trees are the giraffes' only source of food. The giraffe with the short neck, however, cannot reach the leaves of the tall trees, so its only available food source is the leaves of the short trees. The two giraffes reproduce. Of their six offspring, three have long necks and three have short necks. A swarm of beetles lands on the island and begins to eat the leaves of the short trees. The beetles don't like the taste of the leaves of the tall trees, so they leave them alone. The beetles eat the leaves of many of the short trees. Since the giraffes with short necks cannot reach the leaves of the tall trees, some of them die. The remaining giraffes reproduce. Since fewer short-neck giraffes are alive to reproduce, more of the offspring have long necks. Finally, the beetles have eaten the leaves of the short trees. Only the tall trees have leaves. The short-neck giraffes cannot reach the leaves of the tall trees, so they die. Only the long-neck giraffes survive. Now, there are only long-neck giraffes left to reproduce. In future generations, all of the offspring on this island have long necks.
Question: Review the data that was collected concerning the distance traveled by individuals categorized by short or long legs. Which trait may have the greatest chance of being passed down to future generations of lizards-short legs or long legs?
What is the most likely fate of genes that have undergone a duplication? How can natural selection maintain 2 or more copies of duplicate genes in populations?
What sort of signalling occurs when insulin is secreted from the pancreas and acts on muscle cells to increase glucose uptake.
describe, the differences of the homeostatic imbalances of the kidneys known as Glomerulonephritis and Pyelonephritis.
question commercial grade hcl solutions are 39 by mass with a density of 1.20 gml. what is the molality of the
Consumption of puffer fish is often deadly. This is because of ingestion of a virulent poison tetradotoxin (TTX) that is concentrated in fish organs.
Need to do a table with the following information by titles.find out whether a person who shows the dominate
Among bryophytes, only the sporophytes of mosses and hornworts have stomata, whereas stomata are missing from liverwort sporophytes. If the common ancestor of all bryophytes had sporophytes that bore stomata.
As a result of a fall, the optic foramen on one side is damaged. What cranial nerve might be damaged. Will this cause complete blindness or partial blindness?
Suppose that a duplex DNA molecule undergoes two double-stranded breaks that tightly flank the promoter of a gene and that the promoter region is inverted prior to enzymatic repair of the breaks.
discuss in-depth the entire invasion-metastasis cascade. i want a comprehensive discussion about the steps in this
Define restriction fragment length polymorphism (RFLP) analysis. The information generated from RFLP is useful in criminal investigations. Suppose some DNA samples are taken from a crime scene, suspect, and the victim. The samples are amplified..
In humans, mitosis generates new cells for the growth and although mutations are the ultimate source of the genetic variability.
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