Questions
Do the rat and humans have similar anatomy? if so why? When did the first mammals...

Do the rat and humans have similar anatomy? if so why? When did the first mammals appear? how did they evolve? What characteristics do mammals share? What is your conclusion in connection of rats to humans?

In: Biology

life history decisions have no impact on the fitness of an organism

life history decisions have no impact on the fitness of an organism

In: Biology

Differentiate between African sleeping sickness and Chagas disease—vector, symptoms, geographic area affected, what type of patient...

Differentiate between African sleeping sickness and Chagas disease—vector, symptoms, geographic area affected, what type of patient sample would be needed to diagnose this infection?


In: Biology

Question 9 (4 pts) The genetic term “loss of function” is used to describe any mutation...

Question 9 (4 pts) The genetic term “loss of function” is used to describe any mutation in the DNA that leads to a particular protein that cannot function. There are many reasons why a protein may not be functioning any longer…digging into your knowledge on mechanism of gene expression and gene expression regulation, describe a mutation that could lead to a loss of function mutation. Where is the mutation in the gene? What function of gene expression or gene expression regulation is it affecting? How is it leading to a loss of function for the protein encoded for within that gene? But I’m going to restrict your answer…describe a mechanism that DOES NOT include a point mutation leading to missense, nonsense or frameshift – in other words, choose a mutation/mechanism other than a mutation that leads to a change in the protein coding region of a mature mRNA. I want you to think outside of that particular box.

In: Biology

An inflammatory response is vital to eliminating an infectious agent. Fully describe inflammation, addressing each of...

  1. An inflammatory response is vital to eliminating an infectious agent. Fully describe inflammation, addressing each of the following in the description.
    1. Complete description of the inflammatory response (be specific)
    2. Methods (more than one) of the initiation of inflammation
    3. At least 3 aspects of the immune response that are enhanced by inflammation and how they are enhanced

In: Biology

1.) a.In eudicots, stomates are usually found only on the bottom of leaves. In what environment...

1.) a.In eudicots, stomates are usually found only on the bottom of leaves. In what environment would you expect to find stomata only on the top of leaves.

b. Some plants close their stomata in the day and only open them at night. In what environment is this most likely to occur?

c. In the photometer, does the water have positive or negative pressure potential?

In: Biology

Sally is blood type AB positive and her mother was type A- and father type B+.  ...

Sally is blood type AB positive and her mother was type A- and father type B+.  

Vikram is blood type B-, and his father was type B+ and mother type O -.

A) What is Sally's genotype:

B) What's Vikram's genotype:

C) The genotypes and blood types (phenotypes) possible in their children.

In: Biology

If a circular plasmid is cut one with a restriction enzyme what is the result? how...

  • If a circular plasmid is cut one with a restriction enzyme what is the result?

  • how do we determine how many times a restriction enzyme cut.

In: Biology

Only a portion of the duration of a single twitch includes increasing tension within a muscle...

  1. Only a portion of the duration of a single twitch includes increasing tension within a muscle fiber.
    1. What are the three main phases/periods of a muscle contraction?
    2. During which portion(s) (name the period) of a twitch is tension NOT increasing. Clearly explain why in each case.

c. What are all the steps involved in a single twitch that happen during this period without tension?

In: Biology

Reflect on your personal experiences and environment. List 3 ways in which you may have been...

Reflect on your personal experiences and environment. List 3 ways in which you may have been exposed to common endocrine disrupting compounds (EDC). Can you imagine changes to either your personal habits and/or community policies that could help protect you and others from continued EDC exposure? Propose your changes here

In: Biology

Describe how methylation occurs on newly replicated DNA

Describe how methylation occurs on newly replicated DNA

In: Biology

Congenital defects in glycogen metabolism can have serious negative effects on human health. Below are several...

Congenital defects in glycogen metabolism can have serious negative effects on human health. Below are several examples taken from box 15.4 in the text. For each example, state how glucose glycogen metabolism is likely altered from an inherited mutation to the stated enzyme (assume these mutations cause the enzymes to lose their normal function).

  1. The “Type 0” glycogen storage disease (liver) is caused by glycogen synthase (GYS). Symptoms include low blood glucose, high ketone bodies, early death.
  2. The “Type Ia (Von Gierke)” glycogen storage disease (liver) is caused by Glucose 6-phosphatase. Symptoms include enlarged liver and kidney failure.
  3. The “Type VII (Tarui)” glycogen storage disease (muscle) is caused by PFK-1. Symptoms include muscle exercise cramps.

Please answer with explanation. Thank you!

In: Biology

A 7 year old female presents with anxiety, dizziness, sweating and nausea following brief episodes of...

A 7 year old female presents with anxiety, dizziness, sweating and nausea following brief episodes of exercise. These symptoms are relieved by eating and do not occur if the patient is fed frequently with small meals. She has hypoglycemia following brief fasting and alanine does not increase blood sugar. This condition is caused by a lack of activity of one enzyme. From the three enzymes listed below, which is the most likely one and briefly explain your reasoning. Also describe briefly why it could not have been one of the other enzymes. The three enyzmes are
a. Cytochrome c reductase
b. Pyruvate carboxylase
c. Hexokinase

In: Biology

determine the distances between the genes, coefficient of coincidence, and interference. Show all calculations. (create pairs...

determine the distances between the genes, coefficient of coincidence, and interference. Show all calculations. (create pairs eg wfm and +++ are a parental pair)

Phenotype

Number of Individuals

wfm

5

+++

7

+fm

4

w++

0

w+m

2

+f+

1

wf+

0

++m

2

In: Biology

A mother has blood type AB and a father has blood type O and they have...

A mother has blood type AB and a father has blood type O and they have a child together. What is the probability that their child will have O blood type like the father? 8. If blood is needed to be given to the mother and AB blood type is not available, what other blood types can the mother receive (not considering Rh factor)? Explain your answer. Explain why a person with AO genotype has the same phenotype (blood type A) as a person with AA genotype.

In: Biology