Questions
Using your data and the fact that plants are roughly 44.5% carbon, calculate how many days...

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

explain how the two growth plates in a long bone account for the ability of a...

explain how the two growth plates in a long bone account for the ability of a long bone to lengthen. Explain what causes rigor mortis.

In: Biology

Assuming 2 ATP per NADH and 1 ATP per FADH, how many moles of ATP can...

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...

. 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...

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...

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:...

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:

  • Complete a traditional SWOT analysis for the situation
  • Who is the decision maker in this case?
  • What appears to be the problem and its significance?
  • Why has the issue arisen and why is the decision maker involved now?

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 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...

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...

  1. 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

What role do organic osmolytes (e.g. urea and TMAO) play in osmoconformers?

What role do organic osmolytes (e.g. urea and TMAO) play in osmoconformers?

In: Biology

List positive and negative effectors for oxygen binding to hemoglobin. explain cooperative binding using hemoglobin as...

  1. List positive and negative effectors for oxygen binding to hemoglobin.
  2. explain cooperative binding using hemoglobin as an example.
  3. Correlate the NCI involved in stabilizing Hb’s and Mb’s structures.

please answer all

In: Biology

How does the Biodiversity of the ecosystem affect plants and animals

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...

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

If anyone is good at photosynthesis i have a question on DCMU. 1a) if DCMU blocks...

If anyone is good at photosynthesis i have a question on DCMU.

1a) if DCMU blocks plastoquinoe from binding to photosystem 2 then in what state (oxidized or reduced) will the chlorophyll of a photosystem 2 be stuck?
- oxidized ???,
b) based on the answer above, in what state would plastoquinoe be stuck and why?
- would it be oxidized because DCMU kills plants so youre losing electrons ?

In: Biology