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Delicious77 [7]
3 years ago
11

To test how fertilizer affects tomato plants, a farmer divided a field of young tomato plants into 10 plots of equal size. The f

armer then put fertilizer on half of the plots and no fertilizer on the other half of the pots. The experimental group in this experiment was:
A. the tomato plants in all the unfertilized plots.
B. all the tomatoes planted in the field
C. all the plots in the field
D. the tomato plants in all the fertilized plots
Biology
1 answer:
cupoosta [38]3 years ago
4 0

Answer:

D. The tomato plants in all the fertilized plots

Explanation:

The independent variable in this case is the fertilizer, because it is the one that is changed in this experiment. This is your clue on how to determine the experimental group.

The experimental group is the group the independent variable is applied on. The group that is not subjected to the independent variable is called the control group.

This is done to ensure that the changes in the experimental group was indeed brought about by the independent variable by comparing the difference between the two groups.

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Vaccination _____.
Luden [163]

Answer:

involves injecting the body with specific medication

Explanation:

Vaccination is a versatile and effective methodology for preventing diseases caused by exposure to harmful bacterial and viral infectious agents. Literally, vaccination refers to the administration of medical preparations that help the body to produce immunity against infectious diseases. Vaccines are used to prevent outbreaks caused by infectious diseases. Even under optimal conditions, vaccination is not always effective in preventing disease transmission, because the immune system of each organism may react in a different manner to the same vaccination (even to the same dose). However, vaccination is always encouraged to prevent the spread of infectious diseases. Although there are many vaccines that target age groups, there are others that can be applied to different ages.

7 0
3 years ago
Read 2 more answers
I need some helppp 40 points...
kherson [118]

Answer:

5: The phenotype for both parents is being tall.

6: 25%

7: 50%

8: 25%

Explanation:

5: We are shown that tall plants are dominant over short plants, and the genotypes of both parents are Tt (tall, short). This means that both parents will be tall.

6: The Punnet Square shows us that 1 out of 4 offspring are TT, 1/4 is 25%

7: The Punnet Square shows us that 2 out of 4 offspring are Tt, 2/4 is 50%

8: The Punnet Square shows us that 1 out of 4 offspring are tt, 1/4 is 25%

8 0
4 years ago
Which of the following planets are considered outer planets
Troyanec [42]
A. B. C. D. E. F. G. H.

They are all outer planets.
5 0
3 years ago
Does the embryo have any leaves? If so, how many? If the embryo has 12 chromosomes, how many chromosomes does a bean or corn spe
iris [78.8K]
<h2>Answer :</h2><h3>Part 1:</h3>

Yes, embryos have leaves which are known as cotyledons.

Plants with two embryonic leaves are termed dicotyledonous ("dicots") .

Plants with one leave are known as monocotyledon.

<h3>Part 2:</h3>

Six (6) Chromosomes.

As embryo is formed from the combination of egg and sperm. If embryo has 12 chromosomes then sperm will have half means 6 chromosomes.

<h3>Part 3:</h3>

Six (6) Chromosomes.

As embryo is formed from the combination of egg and sperm. If embryo has 12 chromosomes then egg of a bean or corn will have half means 6 chromosomes.


5 0
3 years ago
Which of the following best describes what would happen if the offspring of a fragrant, red rose bush produced flowers with no s
drek231 [11]
The answer is <span>B. The offspring would not cross-fertilize often with other roses.

Scent and colour of the flowers are important for pollination because they will attract pollinators. Flowers </span>with no scent and small, pale petals will attract much <span>fewer </span>pollinators than flowers <span>with scent and large coloured petals</span>. This means those bushes would not cross-fertilize often with other roses.
However, they would not die from a lack of pollinators, nor would produce seeds by asexual reproduction. Also, they would not yield more fruit than the parent rose, their fruit would probably be very small,
6 0
3 years ago
Read 2 more answers
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