What are the differences of the development in C.elegans and of the development of snails?
What are the differences of the development in C.elegans and of the development of snails?
Homework Answers
C. elegans embryogenesis is among the best understood examples of asymmetric cell division, and gastrulation occurs after the embryo reaches the 24-cell stage.
Snails (molluscs) provide some of the most impressive examples of mosaic development, in which the blastomeres are specified autonomously, and of cytoplasmic localization, wherein morphogenetic determinants are placed in a specific region of the oocyte. Snails have been demonstrated that the non-diffusible polar lobe cytoplasm is extremely important in normal mollusc development.
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What are the differences of the development in C.elegans and of
the development of snails?
A population of snails is living in Byron’s Bay. The snails are protected from most predators...
A population of snails is living in Byron’s Bay. The snails are protected from most predators by their thick shells. Shell thickness is determined by the snails’ genes. The population of snails in Byron’s Bay consists of an even mixture of individuals with thin shells, medium shells, and thick shells. As a result of climate change, red crabs, which used to be confined to the warmer waters of the south, extend their range northward into Byron’s Bay. Red crabs feed...
In a population of 1000 snails, tests of snail color genes show that 160 snails are...
In a population of 1000 snails, tests of snail color genes show that 160 snails are AA, 480 are Aa and 360 are aa. What is the frequency of the a allele in this population?
Common methods for training evaluation What is the definition of "development"? What are the differences (and...
Common methods for training evaluation What is the definition of "development"? What are the differences (and similarities) between development and training? What is the definition of "training"? Understand what a pretest-posttest is for evaluating training effectiveness. What are the steps of the Instructional Design Process? How do you determine whether employees are ready to undergo training? What is the most effective way to assess training effectiveness? What is instructional design? What is a needs assessment? What is a person analysis?...
The other main group of molluscs are the gastropods - the snails and slugs. Watch the...
The other main group of molluscs are the gastropods - the snails and slugs. Watch the following video of a cone snail: http://www.youtube.com/watch?v=LcBKH7s4SVQ In addition to being pretty cool, cone snails offer significant promise for the development of new medicines. Each species of cone snail produces a unique combination of peptides (short little proteins) that they use to capture their prey. While most venomous animals produce only a handful of different peptides, each species of cone snail produces as many...
This experiment started with 50 snails. What was the calculated estimate of population size (N) for...
This experiment started with 50 snails. What was the calculated
estimate of population size (N) for each of the samplings? How
close were the calculations? Was the average of the two
samplings close to the actual starting population size?
Speculate why there was a difference between the estimated and
actual values for the number of snails.
Counting Snails: Ecological Sampling Technique 1st Recaptured Sample 2nd Recaptured Sample 108 112 Total Number Marked (M) 19 28 Number Recaptured with Mark (R) 86...
Question 17: What is the selective/evolutionary byproduct of differences in shell chirality (left- handed vs.right-handed spirals)...
Question 17: What is the selective/evolutionary byproduct of differences in shell chirality (left- handed vs.right-handed spirals) for snails?
what are the big differences in the way communities approach development today compared to 1990, when...
what are the big differences in the way communities approach development today compared to 1990, when porter wrote the competitive advantage of nations
. A colony of snails are living on a forest tree near a river. Other colonies...
.
A colony of snails are living on a forest tree near a river.
Other colonies are on nearby trees. When the river floods, a tree
is swept away, with the snails riding along. When the floodwaters
subside, the tree and snails have landed in a new habitat, where
this type of snail did not previously live. The snails reproduce,
and establish a successful population in the new habitat. Assuming
no more snails from the original population arrive, over a...
Describe differences in the gross motor development. How do these differences illustrate the cephalocaudal and proximodistal...
Describe differences in the gross motor development. How do these differences illustrate the cephalocaudal and proximodistal principles?
16.) Snails are a great known biological indicator of radiation levels in an environment due to...
16.) Snails are a great known biological indicator of radiation levels in an environment due to their ability to retain radiation levels for 2 months after exposure. A snail species by Chernobyl is known to have a mean width of 4.75 cm. Following the Chernobyl reactor meltdown of 1986 scientists have been concerned about how the growth of different animals may be affected. One scientist was worried about the snails and how their width might be affected by the radiation....
The other main group of molluscs are the gastropods - the snails and slugs. Watch the following video of a cone snail: http://www.youtube.com/watch?v=LcBKH7s4SVQ In addition to being pretty cool, cone snails offer significant promise for the development of new medicines. Each species of cone snail produces a unique combination of peptides (short little proteins) that they use to capture their prey. While most venomous animals produce only a handful of different peptides, each species of cone snail produces as many...
This experiment started with 50 snails. What was the calculated
estimate of population size (N) for each of the samplings? How
close were the calculations? Was the average of the two
samplings close to the actual starting population size?
Speculate why there was a difference between the estimated and
actual values for the number of snails.
Counting Snails: Ecological Sampling Technique 1st Recaptured Sample 2nd Recaptured Sample 108 112 Total Number Marked (M) 19 28 Number Recaptured with Mark (R) 86...
Question 17: What is the selective/evolutionary byproduct of differences in shell chirality (left- handed vs.right-handed spirals) for snails?
.
A colony of snails are living on a forest tree near a river.
Other colonies are on nearby trees. When the river floods, a tree
is swept away, with the snails riding along. When the floodwaters
subside, the tree and snails have landed in a new habitat, where
this type of snail did not previously live. The snails reproduce,
and establish a successful population in the new habitat. Assuming
no more snails from the original population arrive, over a...
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