Using your data and the fact that plants are roughly 44.5% carbon, calculate how many days it would take for all of the carbon in your leaves to be respired if microbes continue to metabolize at the rate you measured. Now, think back to a just-fallen leaf outside. Considering how many days you estimate it would take your leaves to disappear, do you think there are enough days that are moist and warm enough to allow complete metabolism of leaves between fall and spring, say between November 1 and May 15? Explain.
In: Biology
In: Biology
Assuming 2 ATP per NADH and 1 ATP per FADH, how many moles of ATP can be generated in E. coli cell when one mole of arachidonic acid (20:4) is completely oxidized during beta-oxidation? Assume only FADH is produced during beta-oxidation.
a. 93 ATP/mole 20:4
b. 94 ATP/mole 20:4
c. 95 ATP/mole 20:4
d. 96 ATP/mole 20:4
e. 97 ATP/mole 20:4
f. 98 ATP/mole 20:4
In: Biology
. Gradualism is an important assumption of evolutionary theory.
A. A complex structure like the eye would be unlikely to emerge from a single large-scale mutation. How does gradualism help evolutionists address the evolution of complex adaptations, such as the eye?
B. How do ring species support a gradualist model of speciation? Explain.
2. Use the comparative method to answer the following questions about selection and adaptation, discussed Chapter 8.
A. What are convergent evolution and divergent evolution?
B. Why would selection ever delete a trait after having built it? Explain how cave-dwelling species lost the eyes that had evolved in their ancestors.
C. Why are disabling mutations in an olfactory receptor gene more likely to be “tolerated” by selection in a species with full trichromatic vision than in species without it?
D. Do you see parallels between increased loss of olfactory genes in species with trichromatic vision and the evolution of eyelessness in cave-dwelling species? Explain.
3. Altruistic traits, by definition, harm the individual manifesting the trait and help others.
A. What does Hamilton’s Rule say about the conditions under which kin selection should favor altruism?
B. In the woodpecker nest-helper example from class, explain how it can be in the evolutionary interests of a young bird to help their mother or sister breed when there are not enough nest holes to breed on their own.
C. Even when there are nest holes available, young birds sometimes help their mothers breed instead. How do “Selfish Genes” explain the evolution of behavior that is not in the interests of the individual (not facultative altruism).
D. In the case of reciprocal altruism, explain how reciprocity can maintain altruism even without close genetic relatedness.
In: Biology
What is/are the energy source(s) utilized by primary producers in the hydrothermal vents on the ocean floor?
(a) light
(b) sulfur compounds
(c) organic molecules
(d) carbon dioxide
In: Biology
Which type of protein is very important in all of the following: skin, bone, cartilage, and basal lamina? A. Elastin B. Collagen C. Proteoglycan D. Laminin E. None of the above
Which mutation would be more severe? A. Glycine to alanine B. Glycine to arginine
Interactions between cells and the ECM regulate: A. Cell polarity B. Cell growth C. Cell differentiation D. Cell motility E. All of the above!
In: Biology
Please assist me with this question regarding the case of "Community Blood Center of the Carolinas: Donations, Donations, Donations."
Complete and Answer the following questions:
Make sure that you include an introduction and conclusion to your post.
In: Biology
You are studying a plant that requires a period of cold treatment before it will flower. You subject a plant to cold treatment, return it to temperatures favorable for growth, and then compare the chromatin state of the DNA taken from:
(1) meristem cells from a shoot that originated before the cold
treatment;
(2) meristem cells from a shoot that developed after the cold
treatment;
(3) ovule egg cells from a flower on stem 1;
(4) seeds from a flower on stem 2.
You find that the chromatin states are the same within but differ between which two groups?
|
2, 4 versus 1, 3 |
||
|
1 versus 2, 3, 4 |
||
|
1, 3 versus 2, 4 |
||
|
1, 2 versus 3, 4 |
In: Biology
1.Consider strata I. What can geologists infer based on the position of strata I in relation to the surrounding strata?
Strata I was deposited during the time when strata A was the top most layer of soil
Strata I was deposited after strata G.
Strata I was deposited after a hole was dug in the soil
All of these
2.We discussed several primate hypotheses. Which of the following is NOT a hypothesis explaining why primates evolved?
Visual Predating Hypothesis
Adaptive Hypothesis
Arboreal Hypothesis
Angiosperm Co-evolution Hypothesis
3.
I found a primate skull on a dig this summer. It has an eye socket enclosed by a bony plate. The primate does have a prehensile tail. It has a dental formula of 2-1-3-3. It has a canine honing complex. Based on these features, this primate can be classified as a member of the group…
Platyrrhine
Tarsiforme
Strepsirrhine
Catarrhine
4.
What is one difference between radiocarbon dating and potassium-argon dating?
Radiocarbon dating is used for organic materials while potassium-argon dating is used for rocks
Potassium-argon dating is based on calculations of the half-life of carbon compounds in rock
Radiocarbon dating only dates organic materials older than 200,000 years
Radiocarbon dating is based on calculations of the half-life of carbon compounds in rock
5.
Plesiadapiformes are our suspected primate ancestors but they are not true primates. Palaeontologists consider which of the following the first true primates?
Euprimates
Parapithecus
Tarsiers
Aegyptipithecus
In: Biology
Using the following mRNA sequence, AUG GUG CCA UUC AAU AUG UGG provide a definition and an example of each of the following mutations: silent, nonsense, missense, and frameshift mutation. please explain using the sequence for me to understand.
In: Biology
In: Biology
please answer all
In: Biology
How does the Biodiversity of the ecosystem affect plants and animals
In: Biology
1. Incubation period refers to the time between the start of an infection and the beginning of the period of communicability.
True
False
2. The case fatality rate is the same thing as the mortality rate for a disease.
True
False
3. The term generation time relates to the time interval between lodgment of an infectious agent in a host and the maximal communicability of the host.
True
False
4. A line list is (check all that apply)
A. a graph
B. a list with sign and symptoms
C. a list with patients' demographics
D. a list with dates of onset
5. What type of information would you collect in a questionnaire while investigating an outbreak? (check all that apply)
A. demographic information
B. clinical information
C. risk factors
D. height/weight
E. lab results
6. The most common variables collected in line lists are: (check all that apply)
A. food menu
B. demographic information
C. signs and symptoms
D. physician information (i.e. phone number, address)
E. Lab results
7. A case definition should include the following components: (check all that apply)
A. Signs and symptoms
B. Exposure or risk factor
C. Information about the persons (i.e. women ages 65 and over)
D. Information about time (i.e.persons with onset of illness within the past week)
E. information about place (e.g. employees of a particular plant)
8. Which are the most common ways that a local health department uncovers outbreaks? (Check all that apply)
A. Performing descriptive analysis of surveillance data each week.
B. Performing time series analysis to detect deviations from expected values based on the previous few weeks and comparable periods during the previous few years.
C. Receiving calls from affected residents
D. Reviewing all case reports received each week to detect common features
E. Receiving calls from healthcare providers
In: Biology
In: Biology