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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:

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Which test detects antibodies to hiv and can therefore be used to diagnose aids?
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6 0
3 years ago
Match the reproductive structures based on their function and the system to which they belong.
Rashid [163]

Complete question: Find the complete question in the attached file below.

Answer: From the question, the system to which the structures belong are:

Female reproductive structures include: Egg, ovary, fallopian tube, vagina.

Male reproductive structures include: Urethra, sperm, testis, Vas deferens

Explanation:

The female reproductive system is made up of structures, listed above, which functions together with the purpose of reproducing offsprings. Below is the structure matched with the correct function from the question given:

--> Egg: This functions as the sex cell or gamete

--> ovary: The site where gamete are produced

--> Fallopian tube: This functions to transport the gamete from the site of production in the reproductive system

--> Vagina: connects the internal reproductive fluids to the exterior.

The male reproductive system are also made up of structures that functions together to bring about the fertilization of the female sex cell. Below is the structure matched with the correct function from the question given:

--> Urethra: connects the internal reproductive fluids to the exterior.

--> Sperm:This functions as the sex cell or gamete

--> Testis: The site where gamete are produced

--> Vas deferens: This functions to transport the gamete from the site of production in the reproductive system.

7 0
2 years ago
Apparently means? In English language.<br>I AM GOING TO MARK YOU BRAINLIEST​
Alja [10]

Answer:

Apparently is an adverb, and it describes something that appears to be true based on the context/appearance of a situation

Explanation:

6 0
3 years ago
BRAINLIEST!! According to embryology, why do fish and birds have a common ancestor?
Blizzard [7]

Answer:

Both fish and bird embryos exhibit gill slits and a tail.

Explanation:

According to embryology, all vertebrates exhibit similar traits and structures at their embryonic stage. It becomes very difficult to differentiate between the embryos of a fish, and that of a bird, or embryo of a fish, and a human. These traits, however, disappear, as the case may be, as the embryo develops into an adult. For example, in the case of the embryo of a fish, and a bird, both shows gills slits at their respective embryonic stage. However, the gill slits in fish develop into gills, whereas in the case of birds, it disappears as the embryo develops into an adult.

5 0
3 years ago
Read 2 more answers
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