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Dominik [7]
3 years ago
9

Sandra wanted to test the effectiveness of various kitchen cleaners, so she performed the following experiment. First, she prepa

red five agar plates with the same bacterial density (i.e., the same number of bacteria per plate). Then, she coated the entire agarose surface of one plate with 5 mLs of a particular kitchen cleaner. Finally, she repeated this step three more times using three other kitchen cleaners. Her results appear in the data table below. Plate # of Bacterial Colonies Untreated Plate 24 Cleaner 1 22 Cleaner 2 8 Cleaner 3 12 Cleaner 4 4 Which graph below best represents Sandra's data?
Biology
2 answers:
12345 [234]3 years ago
6 0

Answer:

Cleaner 1 and 3

Explanation:

The most effective cleaners will grow the fewest bacteria. Since cleaners 1 and 3 grew considerably less bacteria than the control (the untreated plate), they are the most effective cleaners.

monitta3 years ago
5 0

Answer:

cleaner 1 and 3

Explanation:

i did the study island trust me

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There are 6 aluminium cans sitting on shelf each can contains
vfiekz [6]

321mL times 6 equals to 1926mL

1926mL in Liters is 1.926L

6 0
3 years ago
4/5 + 2/3 equals what
BigorU [14]

Hey there!

We need to find a common denominator.

5*3= 15

4/5= 12/15

2/3= 10/15

12+10=22

22/15

or

1 7/15

I hope this helps!

~kaikers

7 0
3 years ago
Read 2 more answers
A new mutation arises in one person on the island of Kiribati (human population size 100,000). Assuming this particular mutation
tatuchka [14]

Answer:

0.999999 ≈ 1

Explanation:

In a population ( N ) there is the presence of 2N alleles in the population also chance of fixation can be expressed as ; 1/ 2N

Therefore the probability that the mutation will be lost due to genetic drift

= 2N - 1 / 2N ---- ( 1 )

given that ; N = 100,000

back to equation 1

P ( losing mutation due to genetic drift ) = ((2*100,000) - 1 )) / ( 2* 100,000 )

= ( 200,000 - 1 ) / 200,000

= 0.999999 ≈ 1

5 0
2 years ago
1. results in no motion of the object because forces are equal and in opposite directions
sammy [17]

Answer:

Balanced Forces

Explanation:

When the forces acting on an object have equal strength and act in opposite directions, they are balanced.When the forces acting on an object are unbalanced, they do not cancel out one another.

8 0
3 years ago
Having freckles (F) is dominant over not having freckles (f). A parent with freckles is crossed with a parent without freckles.
Step2247 [10]

Answer:

This is a trick question, and only because the question is vague

Explanation:

Use a Punnet Square to figure out the percentages.

If the parent with freckles (let's just call them Parent A) is homozygous dominant, their genotype would be FF.  The parent without freckles (Parent B) has a genotype of ff.

In any situation, the probability of these two having a child that is homozygous dominant for freckles is 0%.  (see punnet squares for more info).  

Now here's where it gets a little more confusing because the question is kind of vague on this.

Assuming that Parent A is homozygous dominant (both genes for this are dominant (FF)), then the probability of having a heterozygous (non-identical genotype letters, meaning they carry the recessive trait) genotype is 100%.  However, if Parent A is also heterozygous, then that percentage decreases to 50%

For Situation A (Parent A is homozygous dominant), the probability of a homozygous recessive genotype is 0%

For Situation B (Parent A is heterozygous dominant), the probability of a homozygous recessive child is 50%.

Please see the Punnet square I made for more information.

Key:

- Homozygous Dominant: FF

- Heterozygous Dominant: Ff

- Homozygous Recessive: ff

(heterozygous recessive does not exist, because that would mean one of the genes is dominant, which would overpower the recessive gene)

I really hope this helps, and if you're confused by this, please do not hesitate to let me know!

8 0
3 years ago
Read 2 more answers
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