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Nostrana [21]
2 years ago
9

What type of machine is a CD player?

Biology
2 answers:
pogonyaev2 years ago
8 0

Answer:

B. compound machine

Explanation:

A CD Player would be an example of a compound machine. A compound machine is one which contains several simple machines. Simple machines are the following: Levers, pulleys, screws, and inclined planes.

alexandr402 [8]2 years ago
7 0
CD player is Mechanical machine
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How do you use active transport in a sentence
sergey [27]
Active transport is the process in which substances are absorbed against a concentration gradient, i.e. from a lower to a higher concentration.
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3 years ago
A woman with blood type A has a child with blood type O. She accuses a man who is homozygous for blood type B of being the fathe
Svetradugi [14.3K]

Answer:

A woman with blood type A has a child with blood type O. She accuses a man who is homozygous for blood type B of being the father. Could this man be the father of her child? If so, what is the chance he is the father?

No – 0% chance

Explanation:

7 0
3 years ago
The primary difference between a periodic and perpetual inventory system is that a periodic system
sergejj [24]

Answer:

There is no short answer.

Explanation:

The primary difference between the periodic and perpetual inventory system is that the perpetual system keeps track of things from the start to finish continuously while the periodic system divides it into periods and keeps the records at the end of every set period of time.

I hope this answer helps.

4 0
3 years ago
Read 2 more answers
In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If two red-eyed heterozygous
maw [93]
So here we have two heterozygous organisms that will mate. You can put them into a Punnet square, just to be sure of your answers and to find all possible genotypes : 

      R      r
R  RR   Rr
r   Rr     rr

So you have RR, Rr and rr as your possible genotypes. 
6 0
3 years ago
In humans, Rh-positive individuals have the Rh antigen on their red blood cells, while Rh-negative individuals do not. If the Rh
bixtya [17]

Answer: 60%

Explanation:

In population genetics, the Hardy-Weinberg Principle states that the genetic composition of a population remains in equilibrium as long as no natural selection or other factors are active and no mutations occur.

The frequencies of the genotypes of an individual locus will be set to a particular equilibrium value.<u> It also specifies that these equilibrium frequencies can be represented as a simple function of the allelic frequencies at that locus</u>. In the simplest case, with a locus with two alleles A and a, with allele frequencies of p and q respectively, the principle predicts that <u>the genotypic frequency for the dominant homozygous AA is p^2, that of the heterozygous Aa is 2pq and that of the recessive homozygous aa, is q^2. The allele frequency of a is represented as p and the frequency of recessive allele is q.</u>

The three genotypes AA : Aa : aa appear in a ratio p² : 2pq : q². If we add them up, we get the unit:

p^2 + 2pq + q^2 = (p + q)^2 = 1  

And p + q = 1

<u>Rh-positive genotypes are represented as AA (homozygous dominant) or Aa (heterozygous) since the presence of a single dominant allele is sufficient to express the phenotype. While Rh-negative genotypes are represented as aa. </u>

If 84% of the population is Rh-positive, that means that this percentage includes all those who are AA and Aa. Then 16% are aa.

F(aa)=q^2=0.16

then F(a)=q=0.4

And since p + q = 1, p + 0.4 = 1, then p is 0.6

We can also calculate the rest, then F(AA)=p^2= 0.36

So F(Aa)= 2pq = 2 x 0.6 x 0.4 = 0.48

Notice that 0.36 + 0.16 + 0.48 = 1

3 0
2 years ago
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