Which of these statements is false?

How do you determine the magnication of the of view for a microscope?

harkovskaia [24]

1) Look at your microscope<span> eyepiece. After the eye piece </span>magnification<span> you will see a F.O.V, number. 3) Multiply your Answer by 1000 to convert to Microns (or move the decimal 3 spaces to the right.)</span>

7 0

4 years ago

Consider two different traits in mice affecting tail length and fur color. A two-factor cross was made involving true-breeding m

Stells [14]

Answer:

See the answer below

Explanation:

Null hypothesis: The two genes are independently assorting and therefore, are not linked to each other.

Let A represents the allele for tail length and B for fur color. Long-tail A is dominant over short tail a while brown fur B is dominant over white fur b.

For the first cross involving true-breeding mice:

AABB x aabb

F1 AaBb (long tails and brown fur)

For the second cross:

AaBb x aabb

4 AaBb - Long-tail, brown fur

4 Aabb - Long tail, white fur

4 aaBb - short tail, brown fur

4 aabb - short tail, white fur

Since the phenotypic ratio from the cross is 1:1:1:1, if the null hypothesis was to be true, it means that the expected phenotype ratio should be 1:1:1:1.

In order to test this hypothesis, we use Chi-square:

phenotype O E X^2

Long-tail, brown fur 118 97.5 $\frac{(118-97.5)^2}{97.5}$ = 4.31

Long tail, white fur 77 97.5 4.31

short tail, brown fur 81 97.5 2.79

short tail, white fur 114 97.5 2.79

Total 14.2

Degree of freedom = 4 - 1 = 3

Critical Chi-square value = 7.815

The calculated Chi-square value is more than the critical value, hence, the null hypothesis is rejected.

8 0

3 years ago

It is sometimes observed that offspring do not resemble their parents for a particular character, even though the character vari

Yuki888 [10]

Answer:

Explained below

Explanation:

Sometimes offspring do not resembles their parents because of variation, so these character varies in population. When Darwin went to Galapagos Islands, he observed an amazing diversity of characters. He realized that there were many varieties of finches in the same island. He collected two sets of parent offspring data in two different years. Most of the parents who captured before their beak depth were known then he captured offspring with fledged and measured their beak depth. He calculated average beak depth of two parents and then compared with offspring beak depth.

8 0

4 years ago

True or False. Sound first enters the ear, then passes through the eardrum into the ear, and then passes to the ear where the so

Scilla [17]

Answer: TRUE

Explanation:

Sound waves enter the OUTER EAR and travel through a narrow way up to the eardrum, where it vibrates.

The vibrations are sent to the bones of the MIDDLE EAR where they are amplified, and passed to a structure called COCHLEA in the INNER EAR.

Finally, it reaches the sensory cells that passes it to the auditory nerve that transmit the sound to the brain as electrical signals (neural messages) for proper interpretation.

So, it is True because from OUTER EAR to MIDDLE EAR, to INNER EAR.

4 0

4 years ago

Help!

KatRina [158]

The last one is false, the plates are almost always moving

6 0

3 years ago