What are some density dependent and some density independent factors that could together determine the carrying capacity of a species? be sure in your answer your mark it clear which factors and density dependent and which are density independent.

Dr. Trudeau’s little experiment had a big impact on medical thinking at the time. His experiment offered a rationale for opening his Adirondack Cottage Sanitarium, which offered rich and poor alike a regimen of abundant nourishing food, lots of sunlight, plenty of rest, and as much fresh air as a person could tolerate. Hundreds were helped, and many similar establishments were opened. Perhaps the experiment was so successful because of the care with which Trudeau had designed its components. It is important to identify an interesting and potentially approachable question or set of questions before undertaking an experiment. But it is just as important to devise a clever experimental design. When we design an experiment, we choose the treatments that will be received and we control or manipulate them in appropriate ways. These treatments or manipulations are the independent variable(s). The observed or measurable differences in outcome for the treatment groups are the dependent variable(s). Suppose I want to know how much sunlight is needed to produce the sweetest oranges? Based on what I know about sunlight and photosynthesis, I hypothesize that the greater amount of sunlight an orange plant gets, the sweeter the juice of the orange. To investigate whether this is true, I might place one group of plants in the sun for 2 hours per day, another group for 4 hours per day, and nother group for 8 hours per day. At the end of the experiment, I could test for the amount of sugar in the juice of the oranges. The amount of time in the sun is the independent variable. The sugar in the juice is the dependent variable.

7. What is the dependent variable in the Rabbit Island Experiment? Also, list all of the independent variables you can think of in the experiment. (Hmm, maybe Dr. Trudeau’s experiment was not so simple after all!)

8. Often, scientists like to hold all conditions constant except one. Just varying one thing at a time makes it easier to analyze the results. Select any one of the independent variables you have listed above and design an experiment similar to Dr. Trudeau’s. State your experimental question, i.e., what are you trying to find out. Formulate a hypothesis. Then decide upon and write out a description of how you will manipulate your treatment groups (there needn’t be three; you could have two, or four—just design a good experiment!), and then imagine the possible outcomes, assuming survival is the dependent variable. Now generate two survival curves based on those imagined outcomes—one that supports your hypothesis and one that does not. Give possible percent survival rates for each experimental group under both outcomes.

What is the chemical formula for cellular respiration?

Match the term or phrase with the correct Phylum (Division)

1.possess chlorophyll b

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

2. constructed of little "pill-boxes"

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

3.body structure has distinct organs

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

4. possess phycoerythrin

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

5.possess chlorophyll a

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

6.have cell walls

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

7. Siphonocladous body form

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

8.produce up to 50% of the atmospheric oxygen

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

9. possess floridean starch as a storage product

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

10.possess conceptacles at the receptacle tips

A. phaeophyta b.chrysophyta (Bacillariophyta) c.chlorophyta D.All phyla E.Rhodophyta

1. Define and give an example of the following terms: niche, mutation, mimicry, allopatric speciation, and sympatric speciation.
   
2. Identify the type of reproductive isolation in the following:
   1. When tigers and lions are bred in captivity they produce sterile offspring.
   2. A fish breeder fertilizes salmon eggs with trout milt. A few eggs hatch but are deformed.
   3. Some catfish spend most of their time feeding close to the shoreline of a lake. Others feed mostly in the deep water.
   4. One type of nymph reproduces every 18 years but shares a habitat with a smaller type of nymph that reproduces every 12 years.

3. In Ottawa, certain mice live on the east side of the Rideau Canal. The mice on the west side of the Rideau Canal show very different allele frequencies. Suggest possible mechanisms that could account for the difference.
   
4. The Panama Canal was completed in 1914. It is a human-made canal that connects the Atlantic and Pacific Ocean. How might the completion of this canal have affected the evolution of terrestrial species? Suggest how it may affect the speciation of marine organisms.
   
5. Research and discuss the difference between natural selection and artificial selection.
   
6. Discuss two species that humans have released into a new environment. What repercussions might happen to the environment and to the process of evolution?

You are studying a population of wild turtles on a remote Pacific island. You have been following the allelic frequencies at a single two-allele locus 'S', which controls embryonic survival through simple Mendelian inheritance with dominance. The population has been in Hardy-Weinberg equilibrium at this locus for many generations.

At Hardy-Weinberg equilibrium, the frequency of the recessive allele S^d is 0.88

The genotypic frequencies at Hardy-Weinberg equilibrium are as follows:

f(S^DS^D) = 0.0144

f(S^DS^d) = 0.2112

f(S^dS^d) = 0.7744

An increase in ocean temperature between 2018 and 2019 is thought to have driven the population away from Hardy-Weinberg equilibrium at the S locus.

The numbers of sampled offspring by genotype after the 2019 hatch are as follows:

S^DS^D : 200

S^DS^d : 200

S^dS^d : 40

Calculate the relative fitness (W) values for each genotype (you will need all these values in a subsequent step).

a) The relative fitness value for the S^dS^d genotype is [A] (enter your answer as a decimal in the form '0.x'; do not spell out the number as a word; there are no units to include)

b) The type or form of natural selection that has occurred is [B] (use the specific phrase that describes this form of selection completely!).

Now, calculate all genotypic frequencies in the 2019 offspring (first generation after selection):

c) post-selection f(S^DS^D) = [C] (perform this and the following two calculations (d and e) to four significant figures after the decimal point; enter your answers in the exact form '0.wxyz'; make sure to round off correctly; there are no units)

d) post-selection f(S^DS^d) = [D]

e) post-selection f(S^dS^d) = [E]

f) The frequency of the S^d recessive allele in the 2019 offspring (first generation after selection) is [F] (perform the calculation with four significant figures, then round off to 2 significant figures in the final answer; enter your answer in the exact form '0.xy')

How many ATP equivalents are produced from the oxidation of 3 acetyl-CoAs? Hint: There are 2.5 ATP produced when two electrons are transferred from NADH to oxygen by the electron transport chain, and 1.5 ATP are produced when two electrons are transferred from FADH2 to oxygen by the electron transport chain.

At least 400 words. Our system will use turn it in to check the work, so please make sure to use your own words.

Please do not use handwriting, I always have trouble to read the handwriting.

Compare and contrast typhoid fever and salmonellosis.

In the fern, fertilization takes places when ________.

A. moisture is present

B. spores reach the eggs within the archegonia

C. sperm swim in external water to the antheridia

D. conditions are dry enough

E. an insects can provide pollination

what two groups produce seeds?

A. gymnosperms and angiosperms

B. bryophytes and ferns

C. bryophytes and gymnosperms

D. angiosperms and fern

E. angiosperms and bryophytes

Write a well composed paragraph using complete sentences that explains the structure of the cell membrane and then explains how it acts as a gatekeeper to the cell.

Please explain very short and briefly.

1. Describe how ‘sister chromatids’ are different from ‘homologous chromosomes’.

2. Are diploid cells the only cells that can undergo mitosis? What about haploid or tetraploid cells?

3. Genetic variability is created during meiosis. Identify how this variability is created.

4. What is the most challenging aspect of learning about the processes of mitosis and meiosis?

1. What would be the power of magnification when using a microscope with a 10x ocular lens and a 45x objective lens?

• 10x

• 45x

• 55x

• 450x

• 35x
  2. A Petri dish containing isolated colonies of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa would be described as being

• a pure culture.

• a mixed culture.

• a contaminated culture.

• an axenic culture.
  3. What type of media would be the best choice for isolating a bacterial colony

• nutrient broth

• motility media

• trypticase soy agar

• trypticase soy broth
  4. Mannitol salt agar contains (among other ingredients) extracts of animal tissue and mixed proteins, along with sodium chloride, which inhibits the growth of organisms other than those in the genus Staphylococcus. It also includes mannitol, which is fermented by Staphylococcus aureus, turning the medium yellow. Other species of Staphylococcus (which do not ferment mannitol) will still grow, but the medium remains red in color. Mannitol salt agar could be classified as
  

  Check All That Apply

• a solid medium.a solid medium.

• a liquid medium.a liquid medium.

• a differential medium.a differential medium.

• a selective medium.a selective medium.

• a complex medium.a complex medium.

• a defined medium.

7. Draw a concept map of integument repair using the following terms:

• Mast cells    
• Collagen fibers
• Macrophage                
• Fibroblasts
• Inflammatory response
• Scab
• Scar tissue
• Phagocytosis