69 618
Assignments Done
Successfully Done
In February 2019

Evolution Answers

Questions: 47

Free Answers by our Experts: 40

Ask Your question

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Search & Filtering

Please draw in a full 8x10 piece of paper, a comprehensive phylogeny of extant protochordates and vertebrates, starting with the protostomes as the root group. This phylogeny should include two synapomorphies of each group, as well as the main evolutionary changes in the time axis. These should include all the chordate characteristics, plus dorso-ventral inversion, appearance of paired appendages, appearance of jaws, neural crest cells, vertebral column, cranium, etc, as well as the extant anamniotes and amniotes (14 pts). This question merges 3 individual questions from those 3 lectures. Please use this type of phylogenetic representation with as many branches as needed.
Visiting a beach at the ocean, I recently saw a Blue Heron dive and catch quite a spiky/large (and colorful! I think it was called a sculpin) crosswise in it's bill. It appeared, meal was fighting to prevent becoming the bird's dinner. This fish was over a foot in length, quite girthy, and spiky fins! In about a minute the heron had its head and gulped the thing live the whole way down it’s long neck!!

It was a bit gruesome to watch the climax... I thought it was finally over, but once in the stomach you could see the fish kicking much to the discomfort (it appeared) to the bird!

We didn't hang around for longer. I wonder if that was the end for the fish or if the heron its meal??

Still, wouldn’t the sculpin stand a of escaping or even damaging (thrashing, sharp fins, biting, etc.) the bird's insides if eaten like that?? I thin the
elastic/stretchy insides could work against itself, giving the fish a chance to turn around? Thanks!
what are two examples of humans changing living things? and what is it called when people change the size and shape of living things? and why are living things like Giant ground sloths, Sabre tooth cats and ameonites have completed disappeared?
Fossils are preserved remains or traces of ancient organisms. Which of the following is not an example of a fossil? Quartz vein in a lump of granite / ammonite shells embeddded in stone / insects trapped in hardened amber
The trait that increases the gas exchange efficiency of fish gills is the
a. Unusually high velocity of blood flowing through the gills due to the pressure required by having only one ventricle
b. Back-and-forth movement of water that maximizes oxygen uptake
c. Largest respiratory surface of all vertebrates
d. High degree of oxygen saturation in water
e. Blood flowing through the gills in the opposite direction of water flowing over the gills
Which type of cell division is responsible for variability among members of a species, mitosis or meiosis? Why?
The figure below depicts the relationship between fitness and phenotype (“character”), and how this relationship changes from Time 1 to Time 3 as the environment changes. “X” represents that average value of the character in a population. Selection is acting on this population in Time 1, moving the value of X towards maximum fitness. a) assuming at this point that selection is the only force acting on the population, explain why X gets “stuck” towards the left of the graph (a low value of the character) even as, by Time 3, a high value for the character confers the highest fitness . b) if other forces could act on this population, which one(s) could drive the population mean for the character to the right (to the global optimum)?
what is the evolutionary and biological significance of bilateral symmetry?
Which of these causes increased output of urine
A low blood pressure
B high reabsorption from collecting duct
C low water content in the body
D lowered osmotic pressure
The only taxonomic category that has a real existence
Privacy policy Terms and Conditions