Why it was important that Gregor Mendel used thousands of pea plants in his experiments? Would Mendel have found the same results if he had used only twenty plants? Explain.

Answer:

Explanation:

Gregor Mendel used thousands of pea plants in his experiments to ensure that his results were accurate and reliable. By using a large sample size, he was able to reduce the effects of chance and random variation in his experiments. This is important because biological systems are complex and variable, and small sample sizes can lead to inaccurate or misleading results.

Mendel's experiments involved crossing pea plants with different traits (e.g., tall vs. short, yellow vs. green), and he counted the number of offspring with each trait. He found that the offspring followed predictable patterns of inheritance, which he summarized in his laws of inheritance.

If Mendel had used only twenty plants in his experiments, he may not have obtained the same results. With a small sample size, chance events can have a greater impact on the results. For example, if he crossed two pea plants with different traits and obtained only a few offspring, it's possible that chance events (such as mutations or environmental factors) could have influenced the results. This could lead to false conclusions about the inheritance of the traits.

Therefore, using a large sample size was critical to Mendel's success in developing his laws of inheritance. It allowed him to detect patterns that were consistent across many different crosses, and to demonstrate that these patterns were not the result of chance variation.

A fertile valley has farms and a small town. The valley is surrounded by hills, but these hills are not good for farming or living. Over time, the town expands.

How will the town’s growth most likely affect the availability of farmland in the valley?

1. The availability of farmland will decrease.

2. The availability of farmland may increase or decrease.

3. The availability of farmland will remain unchanged.

4. The availability of farmland will increase.

Signal Noise
Information in an electronic signal can be affected by noise. Noise is any unwanted disturbance in a signal. If you've ever seen interference when watching TV, then you've witnessed signal noise.

There are many causes of noise, and it can be introduced into a signal when the information is recorded, processed, transmitted, or received.

6. Suppose the analog signal shown here is from a music program on the radio. How do you think the music would be affected by the noise when you listen to it on the radio? Explain

The type of protein made in the ribosomes depends on which
of the following? You may choose more than one answer.
a. The base sequence of the gene
b. The sequence of the amino acids
c. The number of codons in the gene
d. The number of messenger RNA molecules present

In what ways are sexual and asexual production in plants similar, and in what ways do they differ?

5. Read the scenarios below. For each of the scenarios, identify the following (you should identify the 3 for EACH of the scenarios):

Control Group Independent Variable Dependent Variable

A. John thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, John counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.

B. Candy notices that her shower is covered in a strange green slime. Her friend Belinda tells her that coconut juice will get rid of the green slime. Candy decides to check this out by spraying half of the shower with coconut juice. She sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.

C. Elisa is working on a science project. Her task is to answer the question: "Does Grow Long (which is a commercial hair product) affect the speed of hair growth?" Her family is willing to volunteer for the experiment.