1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Studentka2010 [4]
3 years ago
9

Suppose a scientist wants to test the effects of a pesticide on mice, so he tags nearby families of wild mice. In each nest, he

assigns some mice to the control group and some to the test group. He takes pictures of the mice and measures them. Then, he gives small doses of the pesticides to the mice in the test group. He returns regularly to make observations.
What is a probable source of error for this experimental design?
A.
The scientist could not control the dose given to the wild mice.
B.
The scientist's results were biased by his expectations.
C.
The scientist could not control the environment of the wild mice.
D.
The scientist did not use a control group in the experiment.
Biology
2 answers:
BlackZzzverrR [31]3 years ago
7 0
Its C. Whenever you perform an experiment you want to make sure its as controled as it can possibly be.
Greeley [361]3 years ago
7 0

Answer:

C

Explanation:

You might be interested in
Scientist who studies the plant life in an environment
mr_godi [17]
A scientist who studies plants is called a botanist.
5 0
3 years ago
Read 2 more answers
Which of the following are functions of lymphoid tissue? A. house and provide a proliferation site for lymphocytes B. house and
Genrish500 [490]

Answer:

The correct answer is option D. A and C.

Explanation:

Lymphoid tissue is the body part that is an essential part of the immune system that provides immune response against different infection or pathogens and protects from these foreign bodies. These tissues are present in all over the body that includes spleen, adenoids, tonsils, lymph nodes and other parts.

Lymphoid tissues or organs are the sites of the proliferation of the macrophages and lymphocytes. These structures also assist in furnishing surveillance points for lymphocytes and macrophages.  

Thus, the correct answer is option D. A and C.

6 0
3 years ago
Anthony is studying decent in a tribe in Africa he observed that in the tribe the children inherit land through their father’s s
ira [324]
  • <em><u>Answer:</u></em>
  • <em><u>Answer:im so sorry I need points</u></em>
  • <em><u>Answer:im so sorry I need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]</u></em>
  • <em><u>Answer:im so sorry I need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]sorry I really need points</u></em>
  • <em><u>Answer:im so sorry I need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]sorry I really need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]</u></em>
  • <em><u>Answer:im so sorry I need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]sorry I really need points[tex]\blue{\rule{40pt}{900000pt}}[/tex]sorry</u></em>

6 0
3 years ago
Read 2 more answers
What is a density-limiting factor?
Mumz [18]
Disease, competition, and predation.
4 0
3 years ago
Read 2 more answers
•Address the letter to the editor of a local newspaper.
Julli [10]

The answer is; hydrothermal, geothermal, and wind

Hydrothermal, taped from the biggest river on the state contributes approximately 60% of the energy in the state. Geothermal is second,approximately 30% while wind power contributes approximately 10%.


The costs of the electricity in the state are relatively cheap compared with states whose main source of energy is hydrocarbon fuels.   Geothermal power is the cheapest (even though initial investment is prohibitive). Hydrothermal is slightly expensive than geothermal due to the maintenance required and also  is prone to fluctuations of the river regime. Winds are also cheap but initial investment if the wind farm is high.



Hydrothermal energy has the biggest environmental impact compared to the other two. Due to the walls of the dam on the river, migration of some aquatic species is impeded. The reduced flow of water (and sediments) downstream of the dam also impact these ecosystems. Geothermal and wind energy sources have a very minimal environmental impact on the environment .


The state could increase electronics with low power consumption (such as LED lights) in the market for availability to the population. This would be followed by a sensitization campaign on the ideal use of power in the household to conserve power when not in use.


4 0
3 years ago
Other questions:
  • A certain segment of DNA can be used as a molecular clock. Its rate of mutation is one mutation per 15 million years. Examine th
    15·1 answer
  • Hypothesize why major functions of the human body are regulated by specialized parts of the brain.
    6·1 answer
  • If adenine makes up 20 percent of the bases in a sample of double-stranded dna, what percentage of the bases would be cytosine?
    6·2 answers
  • What is the functional group in Sucrose?
    14·1 answer
  • The _____ theory suggests that favorable behaviors are passed down from generation to generation.
    15·2 answers
  • Which of these is not a beneficial way that viruses are used?
    10·1 answer
  • How to reduce pimples ?​
    12·2 answers
  • Which describes a feature of synthetic polymers?
    9·1 answer
  • Question 2 of 10
    7·1 answer
  • Brown et al. and Morwood et al. reported in 2004 that they had found skeletal remains of a previously unknown type of hominin, n
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!