Ruby has observed that plants in her garden vary in height. She wants to investigate whether a plant species (species A) grows faster than the other garden species (species B, C, and D). Select the statement that describes Ruby gathering enough evidence to support a scientific explanation concerning plant growth rates.
Note: Consider reviewing how Ruby developed her conclusion on page 8 of this lesson to select the best answer.
A. Ruby measures the heights of several species A, B, C, and D plants for a week under the same conditions and finds journal articles that describe the growth rates of each species.
B. Ruby measures the height of a species A plant for a week and finds an anonymous gardening blog that describes the growth rate of species A.
C. Ruby measures the heights of several species A, B, C, and D plants, each species for one week at a time for four consecutive weeks.
D. Ruby measures the heights of several species A, B, C, and D plants for a week under different conditions and finds a journal article that describes the growth rate of species A.
A. Ruby measures the heights of several species A, B, C, and D plants for a week under the same conditions and finds journal articles that describe the growth rates of each species.
This statement shows that Ruby is gathering evidence by measuring the heights of multiple plant species under the same conditions, which allows for a fair comparison. Additionally, consulting journal articles adds a level of credibility and reliability to the information she is using to support her scientific explanation.
You weigh 5 kittens all from the same litter and get the following data (in pounds):
1.05, 1.2, 1.15, 1.2, 1.4.
Calculate the average weight of the kittens, in pounds.
A. 1.3
B. 1.15
C. 1.2
D. 1.0
To calculate the average weight of the kittens, you add up all the weights and then divide by the number of kittens.
Sum of weights = 1.05 + 1.2 + 1.15 + 1.2 + 1.4 = 5.0
Number of kittens = 5
Average weight = Sum of weights / Number of kittens
Average weight = 5.0 / 5 = 1.0
Therefore, the average weight of the kittens is 1.0 pounds.
The correct answer is:
D. 1.0
Which sentence most accurately describes the daily growth rate of plants?
A. sum of individual plant heights divided by number of days
B. average plant height divided by total number of plants
C. sum of individual plant heights divided by total number of plants
D. average change in plant height divided by number of days
C. sum of individual plant heights divided by total number of plants
This sentence accurately describes the daily growth rate of plants by calculating the average height of all individual plants in a specific time frame.
Which example best describes the influence of genetic factors?
A. A shrub with good access to sunlight is taller than other shrubs located in shaded areas.
B. A corn plant is the same height as another corn plant of a different variety.
C. A horse is the same size as its parents and similar height to other horses of the same breed that it lives with on a farm.
D. The adult offspring of a pair of deer is shorter than its parents and obtained fewer nutrients when it was younger.
C. A horse is the same size as its parents and similar height to other horses of the same breed that it lives with on a farm.
This example best describes the influence of genetic factors, as it highlights the similarities in size and height between offspring and parents, as well as between individuals of the same breed. Genetic factors play a significant role in determining the physical characteristics of organisms, as seen in this example.