How did we define homeostasis?
Please answer all these 100 points
Question 1 (2 points)
How did we define homeostasis?
Question 1 options:
Actively changing due to an environmental stimulus
Taking “raw” materials and turning it into a usable energy
The ability to increase in size and complexity
Regulation of bodily functions to stay within a certain range
Question 2 (2 points)
A hypothesis can be described as
Question 2 options:
a testable explanation.
a theory.
a law.
a wild guess.
Question 3 (2 points)
You notice you begin to sweat whenever the door to your bedroom is closed. This is most closely related to which step in the scientific method?
Question 3 options:
making an observation
forming a hypothesis
forming a conclusion
recording data
Question 4 (2 points)
In an experiment, the variable being tested or changed is the
Question 4 options:
control variable
dependent variable
responding variable
independent variable
Question 5 (1 point)
Match each of the following terms with the correct definition.
Question 5 options:
dependent variable
controls or constants
independent variable
hypothesis
1.
An testable explanation to explain a natural phenomenon
2.
the variables that are held constant in an experiment
3.
the variable that is measured as data in an experiment
4.
the variable that is controlled by the experimenter
Question 6 (2 points)
Some chickens lay an egg every day. Other chickens produce few eggs. A study is planned to examine some factors that might affect the number of eggs produced by chickens. Which of the following is NOT a suitable hypothesis for the study?
Question 6 options:
If the cage for the chickens is larger, they will produce more eggs.
If more eggs are produced by the chickens, they will lose more weight.
If there is more protein in the feed, then more eggs are produced.
If chickens receive more hours of light, then they will produce more eggs.
Question 7 (2 points)
Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up as follows. He placed 900 ml of water into each of five 1000 ml glass beakers. To each beaker, he added 5 ml of water from an aquarium which contained a large concentration of algae. The beakers were placed under a lamp which was on a timer to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the following amounts.
Beaker
Amount of Fertilizer
A
8 ml
B
6 ml
C
4 ml
D
2 ml
E
0
Each week, a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.
What is the independent variable in this experiment?
Question 7 options:
amount of fertilizer
number of algal cells
hours of daylight
amount of water
Question 8 (2 points)
Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up as follows. He placed 900 ml of water into each of five 1000 ml glass beakers. To each beaker, he added 5 ml of water from an aquarium which contained a large concentration of algae. The beakers were placed under a lamp which was on a timer to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the following amounts.
Each week, a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.
Beaker
Amount of Fertilizer
A
8 ml
B
6 ml
C
4 ml
D
2 ml
E
0
What is the dependent variable in this experiment?
Question 8 options:
size of beakers
number of algal cells
amount of fertilizer
hours of daylight
Question 9 (2 points)
Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up as follows. He placed 900 ml of water into each of five 1000 ml glass beakers. To each beaker, he added 5 ml of water from an aquarium which contained a large concentration of algae. The beakers were placed under a lamp which was on a timer to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the following amounts.
Beaker
Amount of Fertilizer
A
8 ml
B
6 ml
C
4 ml
D
2 ml
E
0
Each week, a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.
Which of the following is the control group for the experiment?
Question 9 options:
Beaker D
Beaker C
Beaker E
Beaker A
Beaker B
Question 10 (2 points)
To focus a specimen, it is best to start with which objective:
Question 10 options:
High power
Low power
Scanning
Ocular
Question 11 (2 points)
On the image, which number represents the coarse adjustment knob?
Question 11 options:
1
2
5
10
Question 12 (2 points)
What important feature is missing from this line graph representing sea level change between 1870 and 1990?
Climate change in ten graphs – Channel 4 News
Question 12 options:
X axis label
a title
Y axis label
appropriately spaced scales
Answers: 1
Biology, 21.06.2019 19:00
4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.
Answers: 1
Biology, 22.06.2019 00:30
Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.
Answers: 2
Biology, 22.06.2019 03:00
In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.
Answers: 3
Please answer all these 100 points
Question 1 (2 points)
How did we define homeostasis?
How did we define homeostasis?
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