A botanist wants to determine if environmental temperature affects root growth. In her expirement, she creates 4
rooms at temperatures that vary by 5 degrees F. Each room gets 20 seedlings of the same species, which she grows
on agar plates for 60 days. Once a day, she measures the length of each seedling's root. At the end of 60 days, she
compares the length of the roots with the room temperature . She finds the room with the lowest temperature
produced the longest roots.
Which of the following is best identified as a hypothesis?
a. the environmental temperature can affect the growth of a plant's root.
b. plants need light to grow
c. a colder environment produces longer roots
d. plants need 60 days in order to grow their roots. - Correct Answer a. the environmental temperature can affect the
growth of a plant's root.
A botanist wants to determine if environmental temperature affects root growth. In her expirement, she creates 4
rooms at temperatures that vary by 5 degrees F. Each room gets 20 seedlings of the same species, which she grows
on agar plates for 60 days. Once a day, she measures the length of each seedling's root. At the end of 60 days, she
compares the length of the roots with the room temperature . She finds the room with the lowest temperature
produced the longest roots. What is the variable in this study?
a. temperature
b. seedlings
c. light
d. root length - Correct Answer a. temperature
A particular atom is uncharged and it has an electron configuration of 1s22s2p53s2 and a mass number of 14. How
many protons does it have?
a. 14
b. 6
c. 8
d. 12 - Correct Answer d. 12
a scientist wants to collect qualitative research. What method should she use?
a. collecting patient narratives
b. tracking the dosage of a drug and it blood levels in the patient
c. observing a patient's physical changes
d. writing journal notes about the research experience - Correct Answer a. collecting patient narratives
c. observing a patient's physical changes
d. writing journal notes about the research experience
a scientist wants to conduct quantitative research. Which method should she use?
a. collecting patients narratives
b. tracking the dosage of a drug and its blood levels in the patient
c. observing a patient's physical changes
d. writing journal notes about the research experiences - Correct Answer b. tracking the dosage of a drug and its
blood levels in the patient
a veterinarian student designs a study to examine the nutritional qualities of dog food. She believes that a grain-free
diet can affect dog health. She selects 3 of the top-selling dog food brands for her study. From a local humane
society, she reveals several chihuahua puppies under the age of 1 year. She will track these puppies for the next
year and asses their health, including weight, complete blood count, and paw size. Three puppies will be be fed
, nothing but brand #1 dog food, 10 puppies will only be fed brand #2, and 10 puppies will only be fed brand #3 dog
food.
what is the independent variable in this experiment?
a. time
b. dog weight
c. dog species
d. dog food type - Correct Answer d. dog food type
a veterinarian student designs a study to examine the nutritional qualities of dog food. She believes that a grain-free
diet can affect dog health. She selects 3 of the top-selling dog food brands for her study. From a local humane
society, she reveals several chihuahua puppies under the age of 1 year. She will track these puppies for the next
year and asses their health, including weight, complete blood count, and paw size. Three puppies will be be fed
nothing but brand #1 dog food, 10 puppies will only be fed brand #2, and 10 puppies will only be fed brand #3 dog
food.
How can the researcher best improve this experiement?
a. The experiement should include 7 more dogs for brand #1 group.
b. the daily serving or kibble should be controlled
c. the experiments needs a cleatly defined control of puppies.
d. all of the above are ways to improve the experiment - Correct Answer d. all of the above are ways to improve the
experiment
Alkali metals are in which group of the periodic table?
a. Group 1
b. Group 2
c. Group 7
d. Group 8 - Correct Answer a. Group 1
An FBI agent has spent her career studying individual serial killer. From this data, she creates a theory about these
killers. What type of reasoning has she used?
a. deductive reasoning
b. conductive reasoning
c. quantitive reasoning
d. inductive reasoning - Correct Answer d. inductive reasoning
DNA has both a "sense" and "antisense" strand. What is true about the antisense strand?
a. it runs 5' to 3'
b. it runs 3' to 5'
c. it is used in replication
d. it is the direction DNa is stored - Correct Answer b. it runs 3' to 5'
c. it is used in replication
During which of the following stages does crossing over occur?
a. Mitosis prophase 1
b. Meiosis prophase 1
c. Mitosis prophase 11
d. Interphase - Correct Answer b. Meiosis prophase 1
Dysentery is an infectious disease caused by what type of microbe?
a. helminth
b. bacteria
c. protozoan
d. fungus - Correct Answer c. protozoan