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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.

(1 point)
Responses

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.
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.

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.
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.

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.
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.

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.
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.

7 answers

The best statement that describes Ruby gathering enough evidence to support a scientific explanation concerning plant growth rates is:

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 option indicates that Ruby is collecting data from multiple species under controlled conditions, which allows for a more reliable comparison. Additionally, referencing journal articles strengthens her investigation by providing scientific backing to her findings.

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.

(1 point)
Responses

1.3
1.3

1.15
1.15

1.0
1.0

1.2

To calculate the average weight of the kittens, you need to add all the weights together and then divide by the number of kittens.

The weights of the kittens are: 1.05, 1.2, 1.15, 1.2, and 1.4.

  1. Add the weights:
    \( 1.05 + 1.2 + 1.15 + 1.2 + 1.4 = 6.1 \) pounds

  2. Divide by the number of kittens (5):
    \( \frac{6.1}{5} = 1.22 \)

The average weight of the kittens is 1.22 pounds.

Since the options provided do not include 1.22, rounding it to one decimal place gives us 1.2.

So, the correct choice is:

1.2

Which sentence most accurately describes the daily growth rate of plants?(1 point)
Responses

sum of individual plant heights divided by total number of plants
sum of individual plant heights divided by total number of plants

sum of individual plant heights divided by number of days
sum of individual plant heights divided by number of days

average change in plant height divided by number of days
average change in plant height divided by number of days

average plant height divided by total number of plants
average plant height divided by total number of plants

The sentence that most accurately describes the daily growth rate of plants is:

average change in plant height divided by number of days

This definition captures the concept of the daily growth rate by taking the average change in height over a specified period (days), thus providing a clear measure of how much the plants grow each day.

Which example best describes the influence of genetic factors?(1 point)
Responses

The adult offspring of a pair of deer is shorter than its parents and obtained fewer nutrients when it was younger.
The adult offspring of a pair of deer is shorter than its parents and obtained fewer nutrients when it was younger.

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.
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.

A corn plant is the same height as another corn plant of a different variety.
A corn plant is the same height as another corn plant of a different variety.

A shrub with good access to sunlight is taller than other shrubs located in shaded areas.

The example that best describes the influence of genetic factors is:

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 statement indicates that the horse's size is influenced by its genetics, particularly by being similar in size to its parents and other horses of the same breed. The other examples incorporate environmental factors (like nutrients and sunlight) that may affect growth but do not specifically highlight genetic influence as effectively as this one.