Crickets “chirp” by rubbing their wings or legs over each other. This phenomenon is known as stridulation. It is a means by which male crickets “call” to females to communicate their interest in mating. Frequency refers to the number of chirps that crickets
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Crickets “chirp” by rubbing their wings or legs over each other. This phenomenon is known as stridulation. It is a means by which male crickets “call” to females to communicate their interest in mating.
Frequency refers to the number of chirps that crickets produce during a period of time. Some have suggested that you can tell the temperature and the humidity based on how fast crickets chirp.
- Independent variable:
- Dependent variable:
- Controlled variables (at least 3):
a.
b.
c
- Control Treatment:
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- A. What is the effect of temperature on the frequency of cricket chirping? B. What is the effect of humidity on the frequency of cricket chirping? 1. Complete two hypotheses below using one these increases/decreases/stays the same, one for each question (A & B) above:A: As the temperature increases, the frequency of chirping __________ B: As the humidity increases, the frequency of chirping __________ 2. Independent variable: 3. Dependent variable: 4. Controlled variables (at least 3):a.b.c 5. Control Treatment: 6. Data Table Temperature Humidity Number of Chirps9 30 209 68 209 85 2014 85 2419 85 2824 85 358. Plot your data above as bar graph: a. Which variable is plotted on X-axis? b. Which variable is plotted on Y-axis? 7.…Bigger dogs will have more puppies than smaller dogs in a litter. What is the independent variable, dependent variable, constant, and control group?Which of the following ecological situations would result in INCREASED selection on the peaceful “dove” strategy relative to the hawk-dove game discussed in class? Increased value of the resource Unlikely that the individual will have future opportunities to get the resource Decreased cost of displaying All of the above
- After spraying your yard with a weed-killer you notice that you don't see any bees in your yard for the next few days. You know that bees are a keystone species that is critical for a healthy environment, and want to investigate if there is a connection between the weed-killer and the absence of bees. Task: Design an experiment that could test this association by describing each of the following points with a sentence: Describe your hypothesis: Describe your dependent variable: Describe you independent variable: Describe your positive control group: Describe a negative control group:Under the Disturbance Selection model, r-selected individuals live in what kind of habitat? Question 9 options: High stress, low disturbance Stable Highly disturbed Low stress, high disturbance None of theseAs part of any scientific study, a scientist will only change one dependent variable at one time. Select one: True False
- In an experiment design to test the effects of outboard motor oil on the growth of algae, identify the control, the independent variable, and the dependent variables. Construct a simple hypothesis.a experiment of Brown Anole Lizard Distribution is conducted to perform my experiment I will choose 4 spots in a park such as a lake, a shaded tree, a boardwalk, and a sidewalk. then to quantify my results I will go three times a day for five weeks and count how many lizards I see in each area. what would the control would beWhich of the following is an example of a question about mechanism (not function)? A. What stimuli triggers a mother bird to feed her nestling? B. How does parental care benefit the mother's inclusive fitness? C. Why do some species have parental care but not others? D. Do mother birds get better at caring for their offspring over time?
- Figure 1.15 Example of error bars in a graph. This graph was adapted from the peacock butterfly research described in Section 1.5. The researchers recorded the number of times each butterfly flicked its wings in response to an attack by a bird. The squares represent average frequency of wing flicking for each sample set of butterflies. The error bars that extend above and below the dots indicate the range of valuesthe sampling error. Figure It Out: What was the fastest rate at which a butterfly with no spots or sound flicked its wings?Read each situation in the chart below. Then, state if it is a density-independent limiting factor or a density-dependent limiting factor. Then, state the specific limiting factor that is occurring. The first one is done for you as an example. SITUATION Dependent - Independent or Density-Dependent Limiting Factor Mrs. Engelbrecht has 32 students assigned to her Biology Class, but she only has room for 28. Because the room is crowded, the extra 4 students leave room to go to Guidance and have their schedules changed. Density- Dependent Emigration Northern pike (it’s a fish) feed on another fish, the yellow perch. An increase in the yellow perch population causes an increase in the northern pike population. Density- Dependent The BP oil spill in the Gulf of Mexico has harmed many aquatic organisms that live in the Gulf region. Density- Independent A new strain of influenza (the flu) breaks out in New York City Density- Dependent A…You are studying a population of mulberry plants. The average mulberry produces 55 leaves, but an insect herbivore preferentially kills plants with more leaves, and therefore the remaining population has an average of 35 leaves after the insects kill certain plants due to the herbivory. The heritability of leaf number is 0.75. What is the response to the selection imposed by the insect herbivores? a. -10 leaves b. -20 leaves c. -15 leaves d. -5 leaves